SMA PV Offset Box - Installation Manual
Contents
1. PV connection cable Y distribution to inverter 1 x positive 1 x negative PV Y distribution 2 x negative 1 x positive PV Y distribution 2 x positive 1 x negative Connection of Inverters with Several Independent Inputs connection cable Y distribution to inverter 1 x negative 1 x positive For an inverter with 2 independent inputs and 1 internally bridged negative DC terminal such as in SMA multi string inverters 1 positive DC terminal per input and 1 negative DC terminal at one of the two inputs are required As a result you will only need 1 SMA PV Offset Box for all the PV modules connected to the inverter Should the negative DC inputs of the inverter not be internally bridged see inverter documentation the SMA PV Offset Box will only apply voltage to one string In this case you must connect 1 SMA PV Offset Box per string For an inverter with more than 2 independent inputs 1 positive DC terminal is required at each input to which voltage is applied first in the morning and last at night In addition 1 negative DC terminal is required at one of these inputs If an inverter has several independent inputs but only 1 input is assigned just 1 positive and 1 negative DC terminal will be required at the assigned input Only in the operating modes Continuous operation or Temporary operation do both positive DC outputs on the SMA PV Offset Box have to be assigned2. Accessories for PV Inverters SMA PV Offset Box Installation Manual PVO BOX A en 10 IMEN PVO Version 1 0 Cen SMA Solar Technology AG Table of Contents Table of Contents Information on this Manual oooooooooo o o 5 2 ISO Orca 7 ZA Appropridis Usage states 7 2 2 Qualifications of Skilled Persons o ooooooo 9 2 3 Safety precaria 9 3 Scope of Delivery ooooooooooomoomomoo ro ooo 10 Product Description ooooooooooooo ooo oooo oo 11 Ll SMAPV ONSEN BOX aaa 11 4 2 Fault Indication Relay ooooooooooooooooooooo 12 Ao ype A A IO 12 AA ED aa yaaa 14 5B AMA A A 15 5 1 Selecting the Mounting Location o 0oooooooooo 15 5 2 Mounting the SMA PV Offset Box o o oooooooooooooo 18 Setting the Operating Mode and Output Voltage 19 Electrical Connection sica dica 23 7 1 Overview of the Connection rea o oooooooooooooo o 23 7 1 1 View from Below si da 23 Pot A O a a N e a eee ee 24 Za AC Coneco esena ee A Ea bee O EEEN 25 7 2 1 Conditions for AC Connection 0 00 00 cece eee 25 7 2 2 Connecting the SMA PV Offset Box to the Electricity Grid AC 27 7 2 3 Connecting the Fault Indication Relay 30 7 2 4 Connecting Additional SMA PV Offset Boxes 31 Psa ER Bo 0 cio PU NE TE 33 7 3 1 Conditions for DC ConnectioN ooo oooooooooooooo oo 33 7 3 2 Ass
3. Figure 4 Parts of the SMA PV Offset Box Item Description Explanation SSS A EDs ss LEDs for operation and fault display c Comectionarea Cable glands for the AC connection and DC connector The SMA PV Offset Box is connected in parallel with the inverter and applies a voltage against earth to PV modules lt can apply a set voltage or automatically regulate its output voltage Depending on its configuration the SMA PV Offset Box performs various functions Overnight it can dissipate PV modules charges which have accumulated during the day In continuous operation the SMA PV Offset Box regenerates PV modules whose efficiency was previously reduced The SMA PV Offset Box continually monitors the connection of the functional earthing FE and the insulation of the PV plant Prior to starting operation the SMA PV Offset Box checks whether the PV strings are reverse poled or interrupted Faults are displayed via LEDs Installation Manual PVO BOX 1A en 10 11 4 Product Description SMA Solar Technology AG 4 2 Fault Indication Relay An external fault indicator can be connected via the fault indication relay in the SMA PV Offset Box Depending on the type of electrical connection the fault indicator is activated either in the event of a disturbance or during faultfree operation of the SMA PV Offset Box 4 3 Type Label The type label clearly identifies the SMA PV Offset Box The type label is located on the righthand side of the e
4. In the event that only 1 DC input is to be connected the positive DC outputs of the SMA PV Offset Box must be bridged with a Y plug Installation Manual PVO BOX IA en 10 35 7 Electrical Connection SMA Solar Technology AG The following DC connection options are possible as examples 0090090 000o 000090 000o 0000 08059 Figure 13 DC connection options for a multi string inverter Connection Options Description Multi string inverter with no DC input assigned all operating modes Multi string inverter with one DC input area completely assigned all operating modes Multi string inverter with all DC inputs completely assigned all operating modes Cable Connections SUNCLIX PV connection cable SMA PV Offset Box to inverter or 2 x positive Y distribution PV connection cable SMA PV Offset Box to inverter or 2 x negative Y distribution PV connection cable PV array to inverter 1 x positive PV connection cable PV array to inverter 1 x negative 5 PV connection cable Y distribution to inverter 1 x positive 1 x negative PV connection cable Y distribution to inverter 1 x negative 1 x positive PV Y distribution 2 x negative 1 x positive 36 PVO BOX lA en 10 Installation Manual SMA Solar Technology AG 7 Electrical Connection SUNCLIX PV Y distribution 2 x
5. There is a risk of electric shock e Observe the maximum DC voltage of the PV modules the inverter and any other DC side components see manufacturer specifications e Only connect approved PV modules and inverters e For SMA inverters observe additional specifications on maximum DC voltage in the datasheet of the SMA PV Offset Box at www SMA Solar com Electrostatic Discharge ESD By touching electronic components you can cause damage to or destroy the SMA PV Offset Box through electrostatic discharge ESD e Earth yourself on an earthed object before touching any component inside the SMA PV Offset Box Do not use the enclosure of the SMA PV Offset Box for this purpose as it is not earthed Installation Manual PVO BOX IA en 10 9 3 Scope of Delivery SMA Solar Technology AG 3 Scope of Delivery Check the scope of delivery for completeness and any visible external damage Contact your specialist dealer if the delivery is incomplete or you find any damage C D E Figure 3 Components included in the scope of delivery tor Guantiy Descipfion Oo fp a rement coma Sp seat ptes o y C e T RN 1 Bpole plug with strain relief S oh 2 pole plug with strain relief ese tral O A E 10 PVO BOX 1A en 10 Installation Manual SMA Solar Technology AG 4 Product Description 4 Product Description 4 1 SMA PV Offset Box The SMA PV Offset Box dissipates power reducing charges in PV modules C
6. 0 33 7 Electrical Connection SMA Solar Technology AG Connection of String Inverters with One Single Input For a string inverter 1 positive and 1 negative DC terminal is required on the SMA PV Offset Box Only in the operating modes Continuous operation or Temporary operation will both positive DC outputs on the SMA PV Offset Box need to be assigned If only 1 DC input is to be connected the second positive DC terminal on the SMA PV Offset Box must also be connected to PV on the inverter The following DC connection options are possible as examples B 2 314 Figure 12 DC connection options for a string inverter Connection Options Description String inverter with DC input not assigned operating mode Night mode String inverter with all DC inputs assigned operating mode Night mode C String inverter with all DC inputs assigned operating mode Continuous operation or Temporary operation 34 PVO BOX 1A en 10 Installation Manual SMA Solar Technology AG 7 Electrical Connection Cable Connections SUNCLIX PV connection cable SMA PV Offset Box to inverter or 2 x positive Y distribution PV connection cable SMA PV Offset Box to inverter or 2 x negative distribution 3 pe connection cable PV a to inverter 1 x positive 1 x positive PV connection PV connection cable PV array to inverter si PV array to inverter 1 x negative
7. 0 SMA PV Offset Boxes to one AC connection in this way SMA PV Offset Box 1 SMA PV Offset Box 2 SMA PV Offset Box 50 Figure 11 Connection of several SMA PV Offset Boxes 7 2 2 Connecting the SMA PV Offset Box to the Electricity Grid AC 1 Slightly release the swivel nut of the cable gland 2 Strip the AC cable by by 130 mm 3 Strip the insulated wires of the AC cable by 7 8 mm 4 Route the AC cable through the cable gland to the AC terminals in the SMA PV Offset Box Installation Manual PVO BOX 1A en 10 27 7 Electrical Connection SMA Solar Technology AG 5 Plug the supplied 4 pole plug into the centre socket in the SMA PV Offset Box 6 Connect L and N to the plug as follows e Connect L to the first or second terminal e Connect N to the third or fourth terminal 7 WMA Ned Danger to life due to electric shock If the cables slip out of the terminal due to excessive tension the enclosure will carry live voltage e Attach the supplied cable tie to relieve the tension 8 Plug the supplied 2 pole plug into the right hand socket in the SMA PV Offset Box 9 Connect FE to the plug 28 PVO BOX lA en 10 Installation Manual SMA Solar Technology AG 7 Electrical Connection 10 Pie Danger to life due to electric shock If the cables slip out of the terminal due to excessive tension the enclosure will carry live voltage e Attach the supplied cable tie to
8. A PV Offset Box at the end of its service life in accordance with the disposal regulations for electronic waste currently applicable at the installation site PVO BOX lA en 10 Installation Manual SMA Solar Technology AG 12 Technical Data 12 Technical Data AC Input Nominal AC voltage 100VW 110V 120V 220V 230V 240 V AC mains frequency 50 Hz 60 Hz Power consumption in standby operation Typical power consumption in operation Maximum power consumption in operation lt 7 W Maximum switching voltage of the fault 240 V AC 30 V DC indication relay Maximum switching current of the fault indication 1 0 A relay DC Output PV Plant Requirements Maximum PV voltage 1 000 V Minimum MPP voltage ofthe inverter Minimum system voltage of the PV array 400 V Minimum system voltage of the inverter 400 V 200 KQ In case of inverters with lower input voltages it is assumed that the inverter and the SMA PV Offset Box will cause mutual interference Installation Manual PVO BOX IA en 10 A9 12 Technical Data SMA Solar Technology AG Protective Devices Maximum permissible fuse protection of the AC 10 A supply voltage Output current limitation according to 6 7 mA IEC 62103 General Data Width x height x depth of device including wall brackets cable glands and lid screws Protection class according to IEC 60529 O ooo O Climatic Conditions Operating temperature range 25 C 60 C Temperature
9. Connection Principle P 26 32 PVO BOX lA en 10 Installation Manual SMA Solar Technology AG 7 Electrical Connection 12 Screw all enclosure lids onto the SMA PV Offset Boxes using the 4 screws torque 5 Nm 7 3 DC Connection 7 3 1 Conditions for DC Connection The SMA PV Offset Box is connected in parallel to the inverter Depending on the type of inverter you will need different DC connection options on the inverter for this If the necessary DC terminals are free on the inverter you can connect the SMA PV Offset Box directly to the inverter If the necessary terminals are not free you will have to connect the SMA PV Offset Box via a Y plug An individual Y plug will be needed for the DC output of each SMA PV Offset Box which cannot be connected directly to the inverter for order numbers see Section 13 A WARNING Danger of electric arcs if the DC circuit is interrupted by Y plugs Y plugs must not be visible or freely accessible in close proximity to the inverter The DC circuit must not be interrupted by Y plugs Follow the procedure for disconnection of the inverter see installation manual of the inverter Follow the procedure for disconnection of the SMA PV Offset Box see Section 9 The DC connection cables must be fitted with the supplied DC connectors for connection to the SMA PV Offset Box see Section 7 3 1 Conditions for DC Connection page 33 Installation Manual PVO BOX 1A en 1
10. Negative DC terminal DC connector PV Positive DC terminals C Reset button For resetting the LED display Enclosure opening M20 For looping the grid connection AC through to another SMA PV Offset Box Enclosure opening M20 For the grid connection AC of the SMA PV Offset Box Installation Manual PVO BOX 1A en 10 23 7 Electrical Connection SMA Solar Technology AG 7 1 2 Interior View e o o 0 Figure 9 Interior view of the SMA PV Offset Box tem Description Explanation Connection socket Connection socket for fault indication relay Bo o Connection socket Connection socket for AC connection Connection socket Connection socket for FE 24 PVO BOX IA en 10 Installation Manual SMA Solar Technology AG 7 Electrical Connection 7 2 AC Connection 7 2 1 Conditions for AC Connection Cable Requirements O When using a fault indication relay the AC cable must have at least 4 wires for the phase L the neutral conductor N the functional earth FE and the fault indication relay In most countries the green yellow conductor for protective earth PE must not be used for functional earthing O When not using a fault indication relay the AC cable must have at least 3 wires for L N and FE In most countries the green yellow conductor for protective earth PE must not be used for functional earthing LI All cables must be double insulated O External diame
11. PV Offset Box is continuously applying voltage the inverter must not be connected to the electricity grid There are two switch positions for the operating mode Temporary operation Temporary operation 1 and Temporary operation 2 After switching between these positions the SMA PV Offset Box restarts temporary operation and runs for another 10 days in continuous operation Setting Options for Output Voltage The output voltage of the SMA PV Offset Box can be regulated in two ways as follows Fixed voltage setting for fast regeneration of the PV modules it is recommended to set the largest permissible fixed voltage The output voltage can be set to a fixed voltage of 400 V 550 V 700 V or 1 000 V The setting of a fixed voltage is required for the operating modes Continuous operation and Temporary operation and is optional for the operating mode Night mode Automatic voltage regulation this setting is only required for the operating mode Night mode With automatic voltage regulation the magnitude of the output voltage is based on the PV voltage of the previous day For the automatic voltage regulation there are two switch positions IFatthe SMA PV Offset Box one terminal is assigned with PV select switch position Automatic 1 string If two terminals are assigned with PV select switch position Automatic 2 strings Obtain approval from module manufacturer Ask your module manufacturer which operating mode setting is
12. SMA Solar Technology AG 5 2 Mounting the SMA PV Offset Box 1 Mark the position of the drill holes 2 PAN Danger to life due to electric shock or explosion if you drill into utility lines There may be gas pipes or electric cables located behind the mounting points which could be damaged when you drill the holes for the SMA PV Offset Box e Make sure that there are no utility lines behind the mounting points 3 Drill the holes Insert the wall plugs 5 Screw the SMA PV Offset Box to the mounting surface 6 Check that the SMA PV Offset Box is fixed securely to the surface 18 PVO BOX lA en 10 Installation Manual SMA Solar Technology AG 6 Setting the Operating Mode and Output Voltage 6 Setting the Operating Mode and Output Voltage Setting Options for the Operating Mode The SMA PV Offset Box has the following operating modes Night operation the SMA PV Offset Box emits voltage overnight and is inactive during the day Continuous operation the SMA PV Offset Box continuously applies a fixed voltage to the PV modules During the continuous operation of the SMA PV Offset Box the inverter must not be connected to the electricity grid Afterwards you must manually set the SMA PV Offset Box to another operating mode and restart the inverter Temporary operation the SMA PV Offset Box runs continuously for 10 days at a fixed set voltage and thereafter switches automatically to night mode As long as the SMA
13. ative field plug 1787726 Phoenix Contact 2 x positive field plug SUNCLIX Y distribution set 2 x SUNCLIX Y distribution SUNCLIX Y SET 10 SMA 1 x SUNCLIX Y distribution with mating connectors Installation Manual PVO BOX IA en 10 51 14 Contact SMA Solar Technology AG 14 Contact IFyou have technical problems concerning our products please contact the SMA Service Line We will need the following data in order to provide you with the necessary assistance Serial number of the SMA PV Offset Box Device type of the connected inverter Type and number of the connected PV modules Number of PV modules connected in series per string Mounting location of the SMA PV Offset Box and of the connected inverter LED display of the SMA PV Offset Box Configured operating mode of the SMA PV Offset Box Configured output voltage of the SMA PV Offset Box Type of fault indicator connected if applicable SMA Solar Technology AG Sonnenallee 1 34266 Niestetal Germany www SMA de SMA Service Line Inverters 49 561 9522 1499 Communication 49 561 9522 2499 Fax 49 561 9522 4699 E Mail ServiceLine SMA de 52 PVO BOX IA en 10 Installation Manual SMA Solar Technology AG Legal Provisions Legal Provisions The information contained in this document is the property of SMA Solar Technology AG Publishing its content either partially or in full requires the written permission of SMA Solar Technology AG Any i
14. cure against inadvertent re connection If a fault indication relay is connected switch off the voltage supply to the fault indication relay and secure against inadvertent re connection 4 DANGER Danger to life due to high voltages in the PV array During operation with the SMA PV Offset Box dangerously high voltages may be present at the PV array due to leakage capacitances e Wait one minute for the PV array to discharge before pulling the DC connectors 4 DANGER Danger of electric arcs if the DC circuit is interrupted by Y plugs e Do not use Y plugs to interrupt the DC circuit e Release and remove all DC connectors on the SMA PV Offset Box To do this insert a flat blade screwdriver blade width 3 5 mm into one of the side slots and pull the DC connectors straight down Do NOT PULL ON THE CABLE Using a suitable multimeter ensure that no voltage against earth FE is present on the DC outputs of the SMA PV Offset Box Only use multimeters with a DC input voltage range up to at least 1 000 V 4 DANGER Danger to life due to high voltages The SMA PV Offset Box takes 1 minute to discharge e Wait 1 minute before opening the enclosure lid Installation Manual PVO BOX 1A en 10 43 9 Disconnecting the SMA PV Offset Box from Voltage Sources SMA Solar Technology AG 8 UA 12 44 NOTICE Damage to the SMA PV Offset Box due to electrostatic discharge The components inside the SMA PV Offset B
15. ections reverse poled DC connection to PV array interrupted Installed in an area with insufficient irradiation or irradiation interrupted during the day SMA PV Offset Box is disconnected on the AC or DC side during the day Regeneration time too short average night period is less than 5 hours Check DC side installation Installation Manual PVO BOX 1A en 10 45 10 Troubleshooting SMA Solar Technology AG o IN y Description and corrective measure O A n x x x Yellow x Insulation fault red Insulation resistance including inverter against earth less than 200 kQ Earth fault in the PV array Inverter and PV Offset Box in operation simultaneously e Check PV array for earth fault see inverter installation manual x x x x Yellow Device fault red e Contact the SMA Service Line see Section 14 Contact page 52 Off Flashing Flashing Flashing x Setting fault red red red The operating mode and output voltage settings are not compatible Prohibited switch position selected e Configure the SMA PV Offset Box correctly see Section 8 Commissioning page 41 Off Off Off Off Off No supply voltage e Check AC side installation 46 PVO BOX 1A en 10 Installation Manual SMA Solar Technology AG 10 Troubleshooting 10 2 Resetting the Fault Display After a reset the SMA PV Offset Box checks whether there is still any fault present After a waiting period the display is updated Any faults still pr
16. ectors 3 Ifthe necessary DC terminals are not free on the inverter connect the respective DC outputs of the SMA PV Offset Box using Y plugs as follows Disconnect the PV cables from the PV array e Split the PV cables between the inverter and PV array e Fit the open cable ends with mating connectors and connect to the Y plug Connect the inverter to the plug which has a direct connection to the PV array Installation Manual PVO BOX 1A en 10 39 7 Electrical Connection SMA Solar Technology AG e Connect the SMA PV Offset Box to the other branch of the Y plug To do this fit the cables with corresponding mating connectors e al 4 Connect the PV cables to the PV array 5 Ifa DC output on the SMA PV Offset Box is not required create a hermetic seal with a DC plug connector and sealing plugs Do NOT plug sealing plugs directly into the DC output on the SMA PV Offset Box e Push the clamping bracket of the unneeded DC connector down 1 and push the swivel nut up to the thread 2 e Insert the sealing plug into the DC connector wa e Push the swivel nut up to the thread and tighten torque 2 Nm yy e Plug the DC connector with sealing plug into the 2 i DC output of the SMA PV Offset Box 40 PVO BOX lA en 10 Installation Manual SMA Solar Technology AG 8 Commissioning 8 Commissioning i Commissioning for the operating modes Continuous operation or Temporary operation For the opera
17. embling the DC Connectors 00 0 ce cece ene 37 7 3 3 Connecting the PV Array DC ooann nananana nadaa ws 39 Installation Manual PVO BOX IA en 10 3 Table of Contents SMA Solar Technology AG S COMMISSIONINO 44 bea idad 41 9 Disconnecting the SMA PV Offset Box from Voltage Sources 43 10 Troubleshooting sanar cines tai 45 MOST A dy tein was A ts he AAE A5 10 2 Resetting the Fault Display atorado 47 11 DecOmmMiISSIONING iuris ida aa 48 11 1 Disassembling the SMA PV Offset Box o ooo ooo oo 48 11 2 Packing the SMA PV Offset Box adidas 48 11 3 Disposing of the SMA PV Offset Box o oooooooooo ooo 48 12 Technical Data i044 oan sno eked beeen see sees 49 13 ACCOSSONICS rd das 51 t4 COMGCH iis aceaee se ca aie eas oooh arte es Sars ne ee te 52 4 PVO BOX 1A en 10 Installation Manual SMA Solar Technology AG 1 Information on this Manual 1 Information on this Manual Validity This manual is valid for the device type PVO N 20 Target Group This manual is intended for skilled persons Only qualified personnel with the appropriate skills are allowed to perform the tasks set forth in this manual see Section 2 2 Qualifications of Skilled Persons page 9 Additional Information Links to additional information can be found at www SMA Solar com Document Type PID The Problem and How to Solve lt Technical information SMA PV Offset Box Symbols Symbol A DANGER Indicates a hazardous s
18. erter with several inputs the negative PV inputs must be internally bridged for this purpose This is the case with SMA multi string inverters providing that the DC switch disconnector Electronic Solar Switch ESS is plugged in Installation Manual PVO BOX 1A en 10 7 2 Safety SMA Solar Technology AG 4 4 4 4 4 Figure 2 Principle of a PV plant with SMA PV Offset Box and multi string inverter No more than 1 SMA PV Offset Box must be connected per inverter Exceptions to this rule are inverters with several inputs in which the negative DC inputs are not internally bridged 1 SMA PV Offset Box per string can be connected to this type of inverter The SMA PV Offset Box can only be operated with PV plants having an insulation resistance including insulation resistance of the inverter of at least 200 kQ The SMA PV Offset Box must only be operated with PV arrays modules and cabling of protection class Il Before installing the SMA PV Offset Box ensure that the permitted operating range of each component is maintained at all times You may only operate the SMA PV Offset Box once you have obtained the appropriate approval from both the manufacturer of the PV modules and the manufacturer of the inverter Note any relevant restrictions in the approvals e g pertaining to the maximum output voltage of the SMA PV Offset Box Any applications other than those described here shall be considered contrary to the appropriate usage Al
19. es The AC cable is looped through between each SMA PV Offset Box 1 Disconnect the previously installed SMA PV Offset Box from all voltage sources see Section 9 A A Route the cable through the cable gland to the terminals in the previously installed SMA PV Offset Box 5 Remove the cable ties 2 Slightly release the swivel nut of the second cable gland M20 on the previously installed SMA PV Offset Box 3 Remove the sealing plug from the cable gland Connect L and N to the 4 pole plug as follows e Connect L to the first or second free terminal e Connect N to the third or fourth free terminal Installation Manual PVO BOX 1A en 10 31 7 Electrical Connection SMA Solar Technology AG 7 K ONA Danger to life due to electric shock If the cables slip out of the terminal due to excessive tension the enclosure will carry live voltage e Attach the supplied cable tie to relieve the tension 8 Connect FE to the free terminal of the 2 pole plug 9 A DANGER Danger to life due to electric shock If the cables slip out of the terminal due to excessive tension the enclosure will carry live voltage e Attach the supplied cable tie to relieve the tension 10 Route the cable through the cable gland to the second SMA PV Offset Box and connect L N and FE to the respective terminals in the same manner 11 Ifa fault indication relay is required loop it through as follows see
20. esent will be re displayed via red LEDs The display of previous faults via yellow LEDs will be deleted You can only reset the LED fault display by pressing the reset button A grid failure or AC side disconnection of the SMA PV Offset Box will not influence the LED display 1 Press the reset button on the bottom of the SMA PV Offset Box M The fault display is reset 2 Wait 6 minutes Read off the LED display again MM The green LED on the SMA PV Offset Box is glowing or flashing The SMA PV Offset Box is in operation X One or more LEDs are glowing red or all LEDs are off A fault has occurred Eliminate the fault and reset the fault display Installation Manual PVO BOX 1A en 10 47 48 11 Decommissioning SMA Solar Technology AG 11 Decommissioning 11 1 Disassembling the SMA PV Offset Box i Disconnect the SMA PV Offset Box from all voltage sources see Section 9 Disconnecting the SMA PV Offset Box from Voltage Sources page 43 Remove all connection cables from the SMA PV Offset Box Loosen the fastening screws and remove the SMA PV Offset Box from the mounting surface Screw the enclosure lid onto the SMA PV Offset Box with the 4 screws 11 2 Packing the SMA PV Offset Box Pack the SMA PV Offset Box Use the original packaging or packaging suitable for the weight and dimensions of the SMA PV Offset Box see Section 12 Technical Data page 49 11 3 Disposing of the SMA PV Offset Box Dispose of the SM
21. gainst dust IP65 intrusion and water jets from any angle Installation Manual PVO BOX IA en 10 13 4 Product Description SMA Solar Technology AG 4 4 LEDs tem Description Explanation Indicates the operating state of the SMA PV Offset Box B RedyellowlED Indicates an FE connection fault or AC connection fault Indicates a DC connection fault D RedyellowlED Indicates an insulation fault E RedwyellowlED Indicates a device fault The LEDs for fault indication are 2 colour They glow red if operation is currently interrupted They glow yellow if a fault has previously occurred but normal operation is currently possible 14 PVO BOX lA en 1 0 Installation Manual SMA Solar Technology AG 5 Assembly 5 Assembly 5 1 Selecting the Mounting Location Requirements for the mounting location A DANGER Danger to life due to fire or explosion Despite careful construction electrical devices can cause fires e Do not mount the SMA PV Offset Box on flammable construction materials e Do not mount the SMA PV Offset Box in the vicinity of highly flammable materials e Do not mount the SMA PV Offset Box in potentially explosive areas O The installation site must be freely and safely accessible at all times without the necessity for any auxiliary equipment such as scaffolding or lifting platforms Non fulfillment of these criteria may restrict servicing QO The mounting surface must be even The wall brackets of
22. itch for setting the output voltage Procedure 1 If the SMA PV Offset Box is already in operation disconnect it from all voltage sources see Section 9 2 Unscrew all the enclosure lid screws and remove the lid 3 Set the rotary switch M to the desired operating mode fo Noselecioneeohseing 4 Set the rotary switch V to the desired output voltage o o Noselecion delouisommg O O ooo fo n E E automatic 2 strings Installation Manual PVO BOX IA en 10 21 6 Setting the Operating Mode and Output Voltage SMA Solar Technology AG 22 A WARNING Danger to life due to electric shock If the output voltage of the SMA PV Offset Box is set too high the insulation of the connected inverters PV modules or other DC side components could be damaged There is a risk of electric shock e Observe the maximum DC voltage of the PV modules the inverter and any other DC side components see manufacturer specifications e Only connect approved PV modules and inverters e For SMA inverters observe additional specifications on maximum DC voltage in the datasheet of the SMA PV Offset Box at www SMA Solar com PVO BOX lA en 10 Installation Manual SMA Solar Technology AG 7 Electrical Connection 7 Electrical Connection 7 1 Overview of the Connection Area 7 1 1 View from Below TR NX D Figure 8 Exterior view of the connection area ltem Explanation DC connector PV
23. ituation which if not avoided will result in death or serious injury A WARNING Indicates a hazardous situation which if not avoided could result in death or serious injury A CAUTION Indicates a hazardous situation which if not avoided could result in minor or moderate injury NOTICE Indicates a situation which if not avoided can result in property damage Information that is important for a specific topic or objective but is not CN e A relevant ott a o SSA KA for meeting a Indicates a requirement for meeting a specific goal goal A Desired rest result LS Undesired result Followed by a solution on how to achieve the desired result Installation Manual PVO BOX 1A en 10 5 1 Information on this Manual SMA Solar Technology AG Abbreviations CO CA ta E 6 PVO BOX 1A en 10 Installation Manual SMA Solar Technology AG 2 Safety 2 Safety 2 1 Appropriate Usage The SMA PV Offset Box applies a voltage against earth to PV modules and in this way dissipates any power reducing charges in the PV modules The SMA PV Offset Box is intended exclusively for in parallel operation on inverters with a maximum DC voltage of 400 V to 1 000 V O D H AH 4 Figure 1 Principle of a PV plant with SMA PV Offset Box and string inverter The SMA PV Offset Box can be operated with both a string inverter and with an inverter with several inputs In an inv
24. n 10 41 8 Commissioning SMA Solar Technology AG Procedure 1 A DANGER 42 Danger to life due to electric shock During operation voltages up to 1 000 V are present in the SMA PV Offset Box e Ensure that the cover is securely screwed on If the SMA PV Offset Box is to be used in the operating modes Continuous operation or Temporary operation Connect PV cables to the inverter Close DC switch disconnector on the inverter Commission the inverter as far as possible see inverter installation manual without connecting the inverter to the electricity grid Leave the miniature circuit breaker of the inverter switched off If the SMA PV Offset Box is to be used in the operating mode Night operation commission the inverter see inverter installation manual Switch the miniature circuit breaker of the SMA PV Offset Box on MM The green LED on the SMA PV Offset Box is glowing or flashing The SMA PV Offset Box is in operation X One or more LEDs are glowing red or all LEDs are off A fault has occurred e Rectify the fault see Section 10 Troubleshooting page 45 PVO BOX A en 10 Installation Manual SMA Solar Technology AG 9 Disconnecting the SMA PV Offset Box from Voltage Sources 9 Disconnecting the SMA PV Offset Box from Voltage Sources Disconnect the inverter from all voltage sources see the inverter installation manual Switch off the miniature circuit breaker of the SMA PV Offset Box and se
25. nclosure SMA Solar Technology AG po www SMA de E SMA PV Offset Box Photovoltaic module regenerator Made in Gi ermany Model PVO N 20 GR1 Serial No Version XXXXXX XX 100 240 V 50 60 Hz 2 5 W 0 5 W 7W 1000 V 400 1000 V 3 3 mA outdoor O XxX CE XXXXXX AH O Figure 5 Layout of the type label em oon OOOO e e O O The information on the type label will support you in the safe use of the SMA PV Offset Box and will be needed when you contact the SMA Service Line The type label must be permanently affixed to the SMA PV Offset Box 12 PVO BOX IA en 10 Installation Manual SMA Solar Technology AG 4 Product Description Symbols on the Type Label Symbol Meaning Explanation Danger to life due to The SMA PV Offset Box operates at high voltages All high voltages work on the SMA PV Offset Box must be performed by skilled workers only Observe the Observe all the documentation supplied with the documentation SMA PV Offset Box Proper disposal Do not dispose of the SMA PV Offset Box with the household refuse The SMA PV Offset Box is equipped with a transformer Protection class Il The protection insulation of the SMA PV Offset Box is compliant with protection class Il CE marking The SMA PV Offset Box complies with the requirements of the applicable EC directives Degree of protection The SMA PV Offset Box is protected a
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27. nductor of the SMA PV Offset Box In a standard compliant installation this current is not allowed to flow through a PE conductor For this reason you must use an FE conductor You can connect the FE conductor either to the substructure of the PV plant or to an equipotential bonding busbar Connection Options for the Potential Free Fault Indication Relay You can connect a separate load optionally for fault indication or for fault free operation You can connect the fault indication relays to an external voltage source or use the voltage between L and N Operation message Error message or N Lor or N Lor Miniature circuit breaker Miniature circuit breaker 1 A 1 A i Fault in the i B i B SMA PV F F Offset Box Lg eee a R SMA PV B B Offset Box in operation 0 SMA PV B B Offset Box 0 F 0 F in operation Light on ee If necessary 22277777 Light on PAN connection e rae Trouble free to earth Error F operation B Figure 10 Connection principle for operation and fault indication 26 PVO BOX IA en 1 0 Installation Manual SMA Solar Technology AG 7 Electrical Connection Explanation Bo Fault free operation Terminal 1 of the fault indication relay Terminal 2 of the fault indication relay Terminal 3 of the fault indication relay Connection of several SMA PV Offset Boxes The AC connection can be looped through to several SMA PV Offset Boxes In total you can connect up to 5
28. nternal company copying of the document for the purposes of evaluating the product or its correct implementation is allowed and does not require permission SMA Factory Warranty The current warranty conditions come enclosed with your device These are also available online at www SMA Solar com and can be downloaded and are available on paper from the usual sales channels if required Trademarks All trademarks are recognised even if these are not marked separately Missing designations do not mean that a product or brand is not a registered trademark The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG Inc and any use of such marks by SMA Solar Technology AG is under licence QR Code is a registered trademark of DENSO WAVE INCORPORATED SMA Solar Technology AG Sonnenallee 1 34266 Niestetal Germany Tel 49 561 9522 0 Fax 49 561 9522 100 www SMA de E Mail info SMA de 2004 to 2013 SMA Solar Technology AG All rights reserved Installation Manual PVO BOX IA en 10 55 SMA Solar Technology SMA Solar Technology AG www SMA de SMA Australia Pty Ltd www SMA Australia com au SMA Benelux bvba sprl www SMA Benelux com SMA Beijing Commercial Company Ltd www SMA China com cn SMA Central 8 Eastern Europe s r o www SMA Czech com SMA France S A S www SMA France com SMA Hellas AE www SMA Hellas com SMA Ib rica Tecnolog a Solar S L U www SMA lberica com SMA Solar I
29. ot need to be interrupted For automatic voltage ings regulation you will need to set the number of connected strings Continuous fixed This operating mode is suitable for the rapid regeneration of operation PV modules with severely reduced power During continuous operation the inverter must be disconnected from the grid Temporary This operating mode is suitable for the rapid regeneration of operation PV modules with severely reduced power The SMA PV Offset Box runs continuously for 10 days at a fixed set voltage and then switches to night mode with automatic voltage regulation During continuous operation the inverter must be disconnected from the grid Setting Faults A setting fault is indicated by 3 red flashing LEDs If the setting of the output voltage is not suitable for the selected operating mode the SMA PV Offset Box displays a setting fault during commissioning see Section 10 Troubleshooting page 45 A setting fault will also be displayed If you have selected an unassigned switch position As long as a setting fault is present the SMA PV Offset Box will not start operation 20 PVO BOX 1A en 10 Installation Manual SMA Solar Technology AG 6 Setting the Operating Mode and Output Voltage Overview of the Configuration Area Ja E E E Ja E E Ja le TIO tem Explanation iM Rotary switch for setting the operating mode Vo Rotary sw
30. ox can be destroyed by electrostatic discharge e Earth yourself before touching any components Do not use the enclosure of the SMA PV Offset Box for this purpose as it is not earthed Unscrew all the enclosure lid screws and remove the lid Ensure that no voltage is present between L and N on the AC terminal using a suitable multimeter Ensure that no voltage is present between L and FE on the AC terminal using a suitable multimeter Ensure that no voltage is present between any fault indication relay terminal and FE using a suitable multimeter PVO BOX 1A en 10 Installation Manual SMA Solar Technology AG 10 Troubleshooting 10 Troubleshooting 10 1 LED Displays The LEDs for fault indication are 2 colour They glow red if operation is currently interrupted They glow yellow if a fault has previously occurred but normal operation is currently possible The possible combinations are given in the following table The x entry in the table means that the previous display of the LED is retained Al Description and corrective measure O pa S a x Ready for operation ng Green x Operation ll x CNE x x x FE connection fault or AC connection fault red L N swapped N not connected SMA PV Offset Box connected between L1 and L2 FE connection interrupted Voltage difference between connected N conductor and FE larger than 50 V AC or DC Check AC side installation x x Yellow x x DC connection fault red DC conn
31. positive l x negative 7 3 2 Assembling the DC Connectors Figure 14 DC connector Description Negative DC connector Bo Positive DC connector Cable Requirements O External diameter 5 mm 8 mm O Cable cross section 2 5 mm 6 mm2 Proceed as follows to assemble each DC connector 1 Strip 12 mm off the cable insulation 2 Lead the stripped cable all the way into the DC connector Be sure to observe the correct polarity Installation Manual PVO BOX IA en 10 37 7 Electrical Connection SMA Solar Technology AG 3 Push the clamping bracket down M The clamping bracket clicks audibly into place M The stranded wire is visible inside the clamping bracket chamber X You cannot see the stranded wire inside the clamping bracket chamber The cable is not correctly in place e Release the clamping bracket To do so insert a 3 5 mm screwdriver into the clamping bracket and lever it open e Remove the cable and go back to step 2 4 Push the swivel nut up to the thread and tighten torque 2 Nm 38 PVO BOX IA en 10 Installation Manual SMA Solar Technology AG 7 Electrical Connection 7 3 3 Connecting the PV Array DC Disconnect the SMA PV Offset Box from all voltage sources see Section 9 2 Ifthe necessary DC terminals are free on the inverter connect the SMA PV Offset Box directly to the inverter To do this fit the connection cables with the respective mating conn
32. range for transport 29 00 Maximum permissible value for relative humidity 100 non condensing Maximum operating altitude above MSL Features AC connection spring clamp terminal for conductors up to 1 5 mm DC connection spring clamp terminal for conductors up to 6 mm SUNCLIX DC connector Fault indication relay standard fitting Connection fault indication relay spring clamp terminal for conductors up to 1 5 mm Torques Enclosure lid screws 50 PVO BOX IA en 10 Installation Manual SMA Solar Technology AG 13 Accessories 13 Accessories You will find the corresponding accessories and spare parts for your product in the following overview If required you can order these from SMA Solar Technology AG or your specialist dealer Brief description Y plug set Multi Contact 3 Y plug set Multi Contact 3 for SB Y SMA parallel connection of 2 strings Y plug set Multi Contact 4 Y plug set Multi Contact 4 for MC SET Y SMA parallel connection of 2 strings Y plug set Tyco Y plug set Tyco for parallel TYCO SET Y SMA connection of 2 strings SUNCLIX DC connector SUNCLIX DC connector 1 negative field plug 1463050 Phoenix Contact SUNCLIX DC connector 1 positive field plug 1463054 Phoenix Contact SUNCLIX Y distribution 1 x positive field plug 1787739 Phoenix Contact 2 x negative field plug SUNCLIX Y distribution 1 x neg
33. recommended for your PV plant Installation Manual PVO BOX 1A en 10 19 6 Setting the Operating Mode and Output Voltage SMA Solar Technology AG Requirements for Setting a Fixed Output Voltage If you set a fixed output voltage on the SMA PV Offset Box this must not exceed the maximum system voltage of the PV modules the inverter or other DC side components General information on the maximum DC voltage of the PV modules and inverters can be found in the respective product documentation Please refer to the manufacturer approvals on the PV modules and inverters for the specific requirements for operation with the SMA PV Offset Box The following applies to SMA inverters e For most SMA inverter types the maximum voltage output to be set on the SMA PV Offset Box is equal to the maximum DC voltage of the inverter e The inverters approved by SMA are listed in the datasheet of the SMA PV Offset Box at www SMA Solar com Permissible Combinations of Operating Mode and Output Voltage Operating Voltage Explanation mode setting Night mode fixed This setting is suitable for the overnight regeneration of PV modules with severely reduced power If you set the output voltage on the SMA PV Offset Box to the maximum system voltage optimum regeneration will take place automatic This setting is suitable for preventing power reductions in the 1 string PV modules Since regeneration takes place overnight inverter suteniate operation does n
34. relieve the tension 11 Screw the swivel nut firmly onto the cable gland 12 If no fault indication relay is to be connected screw the enclosure lid onto the SMA PV Offset Box using the 4 screws torque 5 Nm Installation Manual PVO BOX 1A en 10 29 7 Electrical Connection SMA Solar Technology AG 7 2 3 Connecting the Fault Indication Relay If a fault indication relay is required connect it as follows see Connection Principle P 26 13 Plug the supplied 3 pole plug into the lefthand socket in the SMA PV Offset Box 14 If you wish to receive an operation signal connect the wires to terminals 1 and 2 of the plug 15 If you wish to receive a fault signal connect the wires to terminals 2 and 3 of the plug 16 WM Danger to life due to electric shock If the cables slip out of the terminal due to excessive tension the enclosure will carry live voltage e Attach the supplied cable tie to relieve the tension 17 Connect the fault indication relay either to an external voltage source or connect to L and N The maximum supply voltage for the fault indicator is 240 V AC or 30 V DC The maximum switching current is 1 A 30 PVO BOX IA en 10 Installation Manual SMA Solar Technology AG 7 Electrical Connection 18 Screw the enclosure lid onto the SMA PV Offset Box using the 4 screws torque 5 Nm 7 2 4 Connecting Additional SMA PV Offset Box
35. ter 5 mm 13 mm O Conductor cross section 0 5 mm 1 5 mm2 Miniature Circuit Breaker 4 DANGER Danger to life due to fire If a generator inverter and a load SMA PV Offset Box are connected to the same miniature circuit breaker the protective function of the miniature circuit breaker is no longer guaranteed The currents from the inverter and the electricity grid can accumulate to overcurrents which are not detected by the miniature circuit breaker e Fuse the SMA PV Offset Box with a separate miniature circuit breaker Tip you can connect up to 50 SMA PV Offset Boxes to the same miniature circuitbreaker e Observe the maximum permissible fuse protection of the SMA PV Offset Box when selecting the miniature circuit breaker see Section 12 Technical Data page 49 Inverter Earthing A DANGER Danger to life due to electric shock If the SMA PV Offset Box is operated with an inverter with AC connector and the AC connector is disconnected during operation of the SMA PV Offset Box the inverter enclosure will be live e Connect a second non disconnectable protective conductor to the inverter Do not pull the AC connector out during operation with an SMA PV Offset Box Installation Manual PVO BOX 1A en 10 25 7 Electrical Connection SMA Solar Technology AG FE Connection Since the SMA PV Offset Box applies a voltage against earth to the PV modules an operational current flows through the protective co
36. ternative uses or modifications to the SMA PV Offset Box will void the warranty claims and operation permit Appropriate usage also includes compliance with all the supplied documentation Keep this manual in a convenient place for future reference 8 PVO BOX A en 10 Installation Manual SMA Solar Technology AG 2 Safety 2 2 Qualifications of Skilled Persons The work described in this document must be performed by skilled persons only Skilled persons must have the following qualifications e Knowledge of how an inverter works and is operated e Training in how to deal with the dangers and risks involved in installing and operating electrical devices and plants e Training in the installation and commissioning of electrical devices and plants e Knowledge of all applicable standards and directives e Knowledge and observance of this document and all safety precautions 2 3 Safety precautions Electric Shock When the SMA PV Offset Box is in operation voltage will be present in the PV array at night Prior to any maintenance work on the PV plant e Disconnect the inverter from all voltage sources see the inverter installation manual e Disconnect the SMA PV Offset Box from all voltage sources see Section 9 Disconnecting the SMA PV Offset Box from Voltage Sources page 43 If the output voltage of the SMA PV Offset Box is set too high the insulation of the connected inverters PV modules or other DC side components could be damaged
37. the SMA PV Offset Box must lie flush with the mounting surface C The ambient temperature must be between 25 C and 60 C The LED display of the SMA PV Offset Box must be readable O The mounting location should be close to the inverter If the device is mounted on the PV array support by SMA Service will not be possible O Installation Manual PVO BOX 1A en 10 15 SMA Solar Technology AG 5 Assembly Dimensions for mounting 28 9 mM 140 mm E ON SN eee A C i i O O z E E O LO N as lt O N E O O O N 1 TODD WES YY J D 128 5 mm p 257 mm 7 Figure 6 Dimensions of the SMA PV Offset Box and the drill holes for mounting Observe the permitted mounting positions Mount the SMA PV Offset Box in a vertical position or tilted backwards by max 45 The connection area must point downwards Permitted and prohibited mounting positions Installation Manual 16 PVO BOX lA en 10 SMA Solar Technology AG 5 Assembly Observe recommended clearances e In order to have sufficient room for mounting installation and maintenance of the SMA PV Offset Box observe the recommended clearances In addition take the recommended clearances of the inverter into account Seino a cee ees 100 mm 450 mm Figure 7 Recommended clearances Installation Manual PVO BOX 1A en 10 17 5 Assembly
38. ting modes Continuous operation and Temporary operation of the SMA PV Offset Box the inverter must not yet be fully commissioned The PV cables must be connected to the inverter and the DC switch disconnector closed so that the SMA PV Offset Box can apply voltage to the PV modules However during continuous operation the inverter must not be connected to the electricity grid The miniature circuit breaker must be switched off After completion of continuous operation or after the first 10 days of temporary operation the inverter must be re commissioned Operation of the SMA PV Offset Box with SMA multi string inverters In SMA multi string inverters the strings in the inverter are disconnected by the pulling the Electronic Solar Switch ESS out If the SMA PV Offset Box is commissioned while the inverter remains disconnected e g during continuous operation the SMA PV Offset Box will only apply voltage to one string e Prior to commissioning the SMA PV Offset Box with a disconnected SMA multi string inverter re plug the ESS on the inverter Requirements O DOODODOO SMA PV Offset Box is fixed firmly to the wall Operating mode and output voltage are set correctly AC cable is correctly connected DC cables are correctly connected Unnecessary AC terminals are closed with the corresponding sealing plugs Unused DC inputs are closed with the corresponding DC connectors and sealing plugs Installation Manual PVO BOX 1A e
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