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ENS31 Automatic Isolation Unit Installation and Operating Manual
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1. Attention A Never remove the ENS31 from the top hat rail using brute force This could damage the housing holders Page 16 of 32 Installation and Operating Manual ENS31 A 04 Chapter 4 Electrical Connections 4 Electrical Connections 4 1 Basic configuration The switching elements of the automatic isolating device e g contactors are not enclosed with the unit and must be brought by the installation technician The technician decides on the switching elements most suitable Danger The installation technician must ensure that the power generator is only connected to the mains via the two switching elements assigned to the ENS Risk of accident The ENS31 must be protected by pre fuses in the mains feed circuit min 6 A max 25 A Observe the circuit diagram 4 2 Demands of the switching elements Two contactors with positively driven auxiliary contacts are required for mains disconnection The feedback contacts must be connected in the correct sequence refer to circuit diagram The contactors must be designed for the nominal output of the current inverter or the system at AC3 The decisive factor for dimensioning is the phase with the highest load A 04 Installation and Operating Manual ENS31 Page 17 of 32 Chapter 4 Electrical Connections 4 3 Circuitry Check that the mains power lines and power feed lines are not conducting electricity Switch the power generator feeder
2. Danger The isolation unit can still conduct dangerously high residual voltage some minutes after being switched off Risk of accident Disconnect the mains power lines contactor lines and relay lines Insulate bare contacts from mains power lines contactor lines and relays e g using insulation tape The ENS31 can then be removed from the top hat rail also refer to Chapter 3 5 A 04 Installation and Operating Manual ENS31 Page 19 of 32 Chapter 5 System Description 5 System Description 5 1 Principles of functioning The automatic three phase ENS31 isolation unit is an automatic switch which is used to connect decentralised electricity generators to the public electricity supply In the event of faults in the mains supply the ENS31 interrupts the feeding of electricity into the mains to prevent an island effect The following deviations are monitored e overvoltage and undervoltage e frequency deviation e impedance jumps The isolation unit replaces an otherwise prescribed manual isolation unit to which the power supply authorities must have permanent access Note Further information on the principles of functioning is available on our Internet site at www ufegmbh de Page 20 of 32 Installation and Operating Manual ENS31 A 04 Chapter 6 Function Test 6 Function Test 6 1 Switching the system on Switch the isolation unit on first and then the power generator feeder Th
3. ENS31 Automatic Isolation Unit Installation and Operating Manual UfE Umweltfreundliche Energieanlagen GmbH Joachim Jungius StraBe 9 D 18059 Rostock Tel 49 3 81 405 97 05 Fax 49 3 81 405 97 03 E mail vertrieb ufegmbh de web www ufegmbh de Note i If you have any queries and need to contact UfE GmbH always have the serial number close to hand in order to make reference to it We do not claim the documentation is free of errors and mistakes Please inform UfE GmbH of any errors found in the documentation Copyright This operating manual is the copyright of UfE GmbH This manual is intended for the operator and electrician It contains instructions and information which must not be copied distributed or transferred by technical data methods nor used for the purpose of competition either as an entirety or as extracts without the necessary authorisation Contravention could lead to prosecution and obligation to pay damages All rights reserved particularly in the case of patent application or other registrations We reserve the right to make technical modifications without notice Note i The ENS31 isolation unit and the measuring method are protected by patent Page 2 of 32 Installation and Operating Manual ENS31 A 04 Declaration of Conformity We UfE Umweltfreundliche Energieanlagen GmbH Joachim Jungius Strabe 9 D 18059 Rostock declare in sole responsibility th
4. ENS31 and contactors as follows note the turning direction oc N E N oA 1 2 P L1 N W BL 4 3 14 zZ Lu L23 LL 55 5 6 L3 S 21 soa alt i i 22 x102 x le K10 1 g K10 2 min 6 A Ai A2 Al F max 25 A ry CO g ft R1iR2R3R4 Ki K2 C INL1IL2L8 RELAY CONTACTS MAINS UfE ENS31 Note i The additional pre fuse is only necessary if the direct mains power fuse protection exceeds 25 A The terminals on the ENS31 are arranged as follows Page 18 of 32 Installation and Operating Manual ENS31 A 04 Chapter 4 Electrical Connections 4 4 A Li Attention The ground conductor should always bypass the unit The neutral conductor MUST be connected to the ENS31 otherwise the unit may be damaged If the ENS31 is switched on and off by means of a system control unit the L1 connection of the ENS31 can be switched by means of a relay Note When switching on via L the delay until the contactors are activated can be up to 30 seconds because the ENS31 must test the power feed conditions again Disconnection Switch off the power supply to the mains power lines and lines from the power generator feeder Wait until the isolation unit has removed all the residual voltages
5. Obligations of the proprietor The proprietor is obliged only to allow suitably trained personnel to work with the ENS31 isolation unit who e are familiar with the basic regulations on safety and accident prevention e have read the operating manual the chapter on safety and the safety symbols have understood them and confirmed this with their signature The proprietor must always ensure the entire product documentation is at the disposal of operating personnel Danger The proprietor bears the responsibility for safety This responsibility cannot be delegated 1 3 2 Obligation of personnel Personnel must e be in possession of a license to connect electronic equipment to the public electricity supply e always ensure for themselves that third parties and the equipment are safe e maintain the safety and connection regulations of the power supply provider have read and understood the operating instructions the chapter on safety and warning labels e observe the applicable regulations concerning industrial safety and accident prevention Danger This concerns the safety of yourself and other persons in the vicinity of the ENS31 as well as safety when working with the mains electricity supply A 04 Installation and Operating Manual ENS31 Page 7 of 32 Chapter 1 Safety 1 4 Guarantee and liability Our General Terms of Sale and Delivery apply The proprietor has claim to these on conclusio
6. CONNECTION 0 eee eee cent tenet tenet teneeeeeeeens 10 1 8 Operatomsie ccxd c isstescdectiiieed etienseteioeee hbieneetsiceaedet ede 10 1 9 Rating plate and CE Symbol eee eee eeeeeeeneeeeneeeeeeees 11 2 Connections and Indicators csseceeeeeeseeeeseeesseeeneeeenseeeeseeeesnensneeeensenenees 12 2 1 gt COMMOCHONS spiediens 12 2 2 LCD display and LEDS eee eee eeeneeteeeteneeeeneeee 13 3 Mechanical Installation cssecssenesecesesesseeeeseeeeneneeseceensneesseeeeneeeeneneeeane 14 3 1 Transport and UNPACKING ee eee e tence cence tenes teeeeteeeeeeee 14 3 2 Conditions for installation eee eee eenee tenet eeeeeteeeeeeee 14 3 3 Preparing the electrical meter cabinet ceeeeees 15 3 4 Mounting on the top hat rail 15 3 5 Removing from the top hat rail eee eee eeeeeeeeeeees 16 4 Electrical Comme ction 0 422 2 c ccsesessccsenscecstereceeeseecesecerecuseseneceseceeecusesenereces 17 4 1 Basic Configuration 0 eee eee eeeeeeeeneeeeneeteneeeeeeseneeeeeeeee 17 4 2 Demands of the switching elements 17 43 CIRCUITRY cnisia aaa aaia a aaa 18 44 DisSc nnectiON sisis deise ipeo viae in iise 19 5 System Description ens cscnicciecesecccncesecscesacesceoeesesccesatessnscezasecesceescceveueeescceseneren 20 5 1 Principles of fUNCTIONING eee eee eee eeeeeeeereeteeeeeneeeeeeeeees 20 6 FUNCTION T OSU siccccicscesces cssecucte cnn sad cae ssecevee socusitn uadeusasuc
7. ENS31 A 04 Chapter 8 Troubleshooting 8 2 7 Hardware Errors ENS31 Wiring faults Contactors HRD1 LCD indication Meaning Cause HRD1 0100 00 NC contact of contactor 1 NC contact not connected is open bevor contactor 1 according to item 4 3 is activated HRD1 02 00 00 NC contact of contactor 2 NC contact not connected is open bevor contactor 2 according to item 4 3 is activated HRD1 04 00 00 Contactor 1 activates Enabling defective contactor even with missing incorrectly wired enabling signal HRD1 08 00 00 NC contact of contactor 1 Contactor 1 does not operate does not open even if contactor incorrectly wired contactor is activated NC contact not correctly connected NC contact interchanged HRD1 40 00 00 Contactor 2 activates Enabling defective contactor even with missing incorrectly wired enabling signal HRD1 80 00 00 NC contact of contactor 2 Contactor 2 does not operate does not open even if contactor incorrectly wired contactor 2 is activated NC contact not correctly connected NC contact interchanged HRD2 LCD indication Meaning Cause HRD2 01 00 00 Contactor 1 deactivates Contactor faulty with valid input signal HRD2 02 00 00 Contactor 2 deactivates Contactor 2 faulty with valid input signal NC contact interchanged NC contact 2 opens with one contactor controls both contactor activated signal inputs A 04 Installation and Oper
8. acturer and prevents errors when processing requests A 04 Installation and Operating Manual ENS31 Page 11 of 32 Chapter 2 Connections and Indicators 2 Connections and Indicators 2 1 Connections The following connections are provided at the top edge of the ENS31 RELAIS NT kontakte knerz TE SS j NEE iz SSSI B C A 4connection terminals for contactor control potential free designation from left to right R1 R2 R3 and R4 B 2 connection terminals to connect positively driven auxiliary contacts designation from left to right K1 and K2 C 4 connection terminals to connect three phases and the neutral conductor designation from left to right N L1 L2 and L3 Page 12 of 32 Installation and Operating Manual ENS31 A 04 Chapter 2 Connections and Indicators 2 2 LCD display and LEDs The following indicators are mounted on the front side of the ENS31 IEn o ggo 3 De a im i ce ee Be od oe mm om 00 FO 1 0 Ju fil o6 7 s 12 A B Cc D A LCD display The unit a
9. aining the ENS31 above or in the vicinity of a heater Ensure sufficient ventilation The ENS31 should be mounted as near as possible to the mains power outlet and as far as possible from the electricity feeding source Note These measures reduce the effect of voltage increase by the current source Page 14 of 32 Installation and Operating Manual ENS31 A 04 Chapter 3 Mechanical Installation 3 3 Preparing the electrical meter cabinet Determine the installation position of the ENS31 on the top hat rail Saw a cut out in the cabinet cover at the installation position of the ENS31 so that you can see the ENS31 and its indicators LCD and LEDs without opening the cabinet The cut out must have the following dimensions 3 4 Mounting on the top hat rail Set the isolation unit with its top housing holder A on the top hat rail and turn it downwards against the top hat rail B Use a little force to press on the bottom housing section until the housing holder engages in the top hat rail A 04 Installation and Operating Manual ENS31 Page 15 of 32 Chapter 3 Mechanical Installation 3 5 Removing from the top hat rail The ENS31 can be removed from the top hat rail Insert the tip of a screwdriver in the grooves A in the clamps at the ends of the housing Pull the clamps downwards B The ENS31 is released Remove the ENS31 by turning it a little C away from the top hat rail
10. alue 8 2 2 Error status for frequency LCD indication Cause Recommended action 50 90 Frequency is too high __ If the mains power fluctuations v48 00 Frequency is too low occur frequently contact your 148 00 Frequency jump was ae electricity supply detected RoCoF an Page 26 of 32 Installation and Operating Manual ENS31 A 04 Chapter 8 Troubleshooting 8 2 3 Error status for phase angle LCD indication Cause Recommended action 1170 Phase angle deviates If the mains power fluctuations too far from setpoint occur frequently contact your public electricity supply authority 12401120 Wrong direction of Swap phases L1 and L2 at the rotation of mains connection terminals 8 2 4 Error status for impedance LCD indication Cause Recommended action 9 25 Impedance is If the mains power fluctuations implausibly too high occur frequently contact your v 0 99 Impedance is public electricity supply implausibly too low authority negative n 0 33 Impedance jumps have p 0 44 been detected 8 2 5 Faults in the ENS 31 isolation unit In the event of errors the following text appears in the bottom line of the first or sixth display LCD indication Cause HRD1Err H A measuring error or hardware error has caused in the HRD2Err ENS31 has caused a shutdown The 3 digits are error codes for reference by the manufacture If the HRD3ErrHH error occurs only briefly i
11. at the product Type ENS31 Automatic Isolation Unit fulfils the applicable health and safety requirements in the EU Directives 89 336 EEC Electromagnetic Compatibility EMC and 73 23 EEC low voltage guidelines and the law reorganising the safety of technical apparatus and consumer products law on equipment and product safety as well as the requirements stipulated in other applicable harmonised European Norms In addition the following directive is also fulfilled 89 39 1 EEC employee safety and health protection Klaus Wilhelm K ln Manager A 04 Installation and Operating Manual ENS31 Page 3 of 32 Table of Contents 1 DACA escosccevectersase ctscceveseardevecdeuevssaeesucestauassaudpecdseseocesracdavatassaccevneatavaasesadevausesies 6 1 1 General information ee eeeeeseeeesecesseeeseeeereseeseseeeeseeeenes 6 1 2 Safety symbols used in this operating manual sesse 6 1 3 ODIIGAtIONS 0 ee eee eee e tener tenet eeeaeeteaeeeeaeeeeeeenseeeeeaeeeeas 7 1 3 1 Obligations of the proprietor eee 7 1 3 2 Obligation of personnel sesser 7 1 4 Guarantee and liability cece eee eeeneeeeneeeeseeeeeneeeeas 8 1 5 Accident prevention regulations 0 0 0 eee eeeeeeeeeeseeeeeneeeens 9 1 6 Intended USC eee eeeeeeceseeceseereseeeeseeeeseeeceanersaeeresneeeneeeenes 9 1 6 1 Exclusive purpose eee eee eeneeeeeeeeeeeeteaeereaeetenees 9 1 6 2 Observe information and regulations 9 1 7 Installation and
12. ata from the 10 minute average values gayen B Indicator Meaning A 10 minute average value of voltages plus error status L1 left L2 middle L3 right B Upper shutdown threshold for the 10 minute average value Third to fifth display Impedances of the three phases and shutdown thresholds A B C D G F E Indicator Meaning A Phase identification L1 L2 or L3 and error status B Estimated value for absolute impedance of this phase C Number of measuring pulses per second D Own share of the ENS31 in the total measuring signal E Dynamic upper shutdown threshold for the impedance jump F Last established impedance jump G Dynamic lower shutdown threshold for the impedance jump Page 24 of 32 Installation and Operating Manual ENS31 A 04 Chapter 7 Operation Sixth display Last error which occurred information is lost following ENS reset A B C E D Indicator Meaning A Time since last error s seconds m minutes h hours d days w weeks a years B Duration of last error s seconds m minutes h hours d days w weeks a years C Power on routines since last reset D Error text also refer to Chapter 8 E Error value in the example the impedance of 9 2 ohm was too high on phase 2 If hardware or impedance errors occur the bottom line of the first di
13. ating Manual ENS31 Page 29 of 32 Chapter 8 Troubleshooting 8 2 8 Error indication through LEDs LED indication Cause Recommended action O Red ligh flashes ts up green Frequency error O Red and simultaneously green flash Voltage error O Red O and alternate green flash ly Impedance error Wait until the mains is switched on again Contact the pubic electricity authority in the case of longer power failures O Green lights up with short interruptions Measured value s outside the factory tolerance Mains power is ok O e O Green flashes rapidly ENS31 waiting for acknowledgement from inverse rectifier Mains power is ok O O or O 4 Display of impedance jump threshold value lights up briefly 0 1 ohm lights up longer 0 5 ohm short short long 0 1 0 1 0 5 0 7 Ohm LED continually on threshold is set to 1 ohm or more O O Red lights up Measuring error or ENS31 has failed If the LED lights up longer than 1 minute with mains available the ENS31 is defective Have the ENS31 replaced by a specialist workshop Page 30 of 32 Installation and Operating Manual ENS31 A 04 9 Technical Data Chapter 9 Technical Data Switched power max Dependent on the co
14. e ENS starts up automatically after switching on the mains supply The following appears on the LCD display after a successful self test and mains test When the voltage frequency and mains impedance are in the permissible range for 20 seconds the contactors are triggered and power feed in the public electricity supply begins The mains power is then monitored 6 2 Indicators during operation After switching on the values for voltage impedance and frequency are displayed alternately refer to chapter 7 A 04 Installation and Operating Manual ENS31 Page 21 of 32 Chapter 7 Operation 7 Operation 7 1 Switching the system on The LCD indicates the status of the power on routine The first character indicates the status of the ENS The following states can occur during the power on routine Indicator Meaning 1 Following a reset the ENS31 is in its initialised state WwW After initialisation all the error bits are deleted and the system waits a fixed time The ENS31 is waiting for a return signal gt The ENS31 switches on after the waiting period The ENS31 is switched on the mains power is within a permissible range and power is fed The mains power is monitored constantly The letters indicate D Setting for Germany Austria and Switzerland F Setting for France I Setting for Italy The ENS31 has interrupted power feed Page 22
15. eautucuvesestecducctnctesetueevusut 21 6 1 Switching the system ON ee eee eee eeeeeeeeeeeeeteeeeeeeeeees 21 6 2 Indicators during Operation eee ee eee eeeseeeeneeeeeeeteeeeeees 21 7 OPC VAtlOM Aae ee EEEE EEE E EEE E 22 7 1 Switching the system On sssseseesseesrrerrerrrerrrerrrsrresrresrrsee 22 Page 4 of 32 Installation and Operating Manual ENS31 A 04 Table of Contents 7 2 LED indicators during the power on routine s e 23 7 3 LCD displays during operation 23 7 4 Switching the system Off c ccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeenaes 25 8 TROUDIESNOOFIING cisscc sees decedcnseessccetecescadceesedessoueeceteersccestonedseceessuseseeersteeeesscoese 26 8 1 General information ccccceceeeeeeeeeeeeeeeeeeeseeeeeeseeeeeeeaes 26 8 2 Error indications in the LCD ccc cceeeseeeeeeeeeeeeeeeeeeeeeees 26 8 2 1 Error status for voltage eeeeeeseeeeseeeseeeeeeetens 26 8 2 2 Error status for frequency s e 26 8 2 3 Error status for phase angle s es 27 8 2 4 Error status for impedance s 27 8 2 5 Faults in the ENS 31 isolation unit 27 8 2 6 Error texts for mains power fluctuations 28 8 2 7 Hardware Errors ENS31 2 ccececeeeeeeeeeeeeeteees 29 8 2 8 Error indication through LEDS 30 9 Technical Data aiecccsc25sccec ccc ecscck ccest east secedstveed coat cnetensecuaiesetdaatetieesicievecctetsbeeeze 31 10 Certificate of Non Object
16. ion seussussnunsnunnnunnnunnnunnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nn 32 A 04 Installation and Operating Manual ENS31 Page 5 of 32 Chapter 1 Safety 1 Safety 1 1 General information This chapter contains information on safety and rules of conduct It is essential to observe the information and rules so that any residual risks represented by the product do not lead to a fault or an accident The device must be connected to the local power supply Therefore all the normal risks involved in the use of electrical power are present here too 1 2 Safety symbols used in this operating manual The following symbols are used at the relevant points throughout this manual Pay strict attention to the information provided in these sections and proceed with the utmost care Meaning of the safety symbols Danger This symbol indicates the risk of fatal or personal injury if certain rules of conduct are disregarded When this symbol appears in the operating manual take all the necessary safety precautions Attention This symbol indicates the risk of property damage as well as financial and legal disadvantages e g loss of rights to claims under the terms of guarantee liability etc Note This symbol indicates important information on working efficiently economically and ecologically Page 6 of 32 Installation and Operating Manual ENS31 A 04 Chapter 1 Safety 1 3 Obligations 1 3 1
17. n of the contract at the latest Rights to claims under the terms of guarantee and liability in respect of persons and property are considered void when they are the result of one or more of the following causes e Unintended use of the ENS31 e Improper start up operation and service of the ENS31 e Failure to observe information in the overall documentation in respect of installation connection starting up operation cleaning servicing e Unauthorised constructional modifications to the ENS31 e Damage through overvoltage overload short circuit mechanical interference moisture e Case of catastrophe caused by foreign body or Act of God Attention No modification may be carried out on the ENS31 without the approval of the manufacturer Attention Never attempt to repair the device yourself All rights to claims under the terms of guarantee are annulled in the case of tampering gt gt Page 8 of 32 Installation and Operating Manual ENS31 A 04 Chapter 1 Safety 1 5 Accident prevention regulations Any faults which occur that affect safety must be eliminated immediately The ENS31 may not be operated until the fault has been cleared Danger Solar modules conduct electricity as soon as they are exposed to daylight Observe this when laying and connecting the cables and take the necessary precautions Danger It is forbidden to open the unit The box can continue to conduct da
18. nd mains power status are shown on a 2 line LC display Each line can display 16 characters B to D LEDs In addition to the LCD the unit and mains power status are also indicated by three LEDs red green yellow B LED display for phase 1 L1 C LED display for phase 2 L2 D LED display for phase 2 L3 Note i The meaning of the indicators is described in chapter 7 and chapter 8 A 04 Installation and Operating Manual ENS31 Page 13 of 32 Chapter 3 Mechanical Installation 3 Mechanical Installation 3 1 Transport and unpacking When transporting the ENS31 isolation unit pay attention that it is always protected against contact with dirt and damage through impacts and setting down too hard Remove the ENS31 from the transport packaging and pull off the protective foil if necessary After transport and before installation check that the ENS31 isolation unit is in a perfect condition 3 2 Conditions for installation The ENS31 is intended for installation on a top hat rail in an electrical cabinet or in a meter cabinet It cannot be installed anywhere The cabinet must be sufficiently large to house the ENS31 providing the necessary contactors and protect the unit from moisture dust dirt and heat If there is not enough space in the cabinets available a separate electrical cabinet must be mounted to accommodate the ENS31 and contactors Attention Never position the electrical cabinet cont
19. ngerous residual voltage some minutes after being switched off 1 6 Intended use The ENS31 has been built according to state of the art technology and accepted safety regulations However when the unit is used there remains a risk of fatal and personal injury to the user and third parties as well as impairment of the unit and other property damage 1 6 1 Exclusive purpose The ENS31 is exclusively intended for monitoring voltage frequency and impedance of the electricity network at the feeding point of a power generating system On detecting over and undervoltages frequency deviation or impedance jumps the ENS31 disconnects the feeding point from the public electricity supply by means of contactors Any other use is considered unintended use The manufacturer is not liable for any consequential damage in such cases 1 6 2 Observe information and regulations Intended use also includes e observing all information provided in this operating manual and e maintaining the connection and installation conditions prescribed by the manufacturer A 04 Installation and Operating Manual ENS31 Page 9 of 32 Chapter 1 Safety 1 7 Installation and connection For installation and connection of the ENS31 please observe chapters 2 to 5 Danger It is forbidden to open the unit The unit can continue to conduct dangerous residual voltage some minutes after being switched off 1 8 Operation Operation
20. ntactors assigned Own consumption 3 5 W Housing Plastic suitable for assembly on the top hat rail Overall dimensions W x H x D 220 mm x 111 mm x 80 mm Cut out dimensions W x H 220 mm x 73 mm Ambient conditions 20 C to 40 C 10 to 90 relative humidity non condensating Nominal current of power feeder According to max switching power of the contactors The unit disconnects the mains under the following defined conditions complying with standard DIN VDE 0126 Overvoltage gt 300 V response time 0 02 s fast shutdown Overvoltage gt 264 V response time 0 2 s Overvoltage average 230 V 10 over 10 minutes Undervoltage lt 130 V response time 0 02 s fast shutdown Undervoltage lt 185 V response time 0 2 s Frequency deviation 0 2 Hz 2 5 Hz response time 0 2 s Impedance jump detection gt 0 5 Ohm response time 0 5 s Installation and Operating Manual ENS31 Page 31 of 32
21. of 32 Installation and Operating Manual ENS31 A 04 Chapter 7 Operation 7 2 LED indicators during the power on routine LEDs are provided for each individual phase and light up as follows during the ower on routine Indicator Meaning ojojo cos oleo All LEDs light up to begin with After approx 1 sec a running light is activated The mains power is in order and the ENS31 switches it on During operation the yellow LED can flash or light up continually 7 3 LCD displays during operation The LCD runs through the following display modes cyclically First display Error status mains voltages power on routines since last rest mains frequency phase angle and error messages A B C ea F E D Indicator Meaning A Country identification plus error status Country identification letters signify the following D Setting for Germany Austria and Switzerland F Setting for France I Setting for Italy Mains voltage of the individual phases plus error status L1 left L2 middle L3 right Number of power ons since the last reset Phase angle plus error status The phase angle L1 L3 is to the right phase angle L1 L2 is to the left Mains frequency and error status Mains power status ok A 04 Installation and Operating Manual ENS31 Page 23 of 32 Chapter 7 Operation Second display D
22. of the ENS31 is impermissible e for monitoring tasks for which the unit is not designed e when using accessories which have not been approved by the manufacturer e when the proprietor has made constructional modifications Functional faults must be analysed immediately If necessary the proprietor must request specialist assistance The equipment may only be put into operation again when there is no doubt about its safety The ENS31 is intended for operation at room temperatures between 20 C and 40 C also refer to Chapter 9 Contact a suitably trained electrician or the manufacturer in the following cases e connection cable is damaged liquids or foreign bodies have got inside the unit the unit has been exposed to water or rain the unit has fallen down or is mechanically damaged the unit behaves in a way indicating a fault e g indicator on the LCD constant switching Page 10 of 32 Installation and Operating Manual ENS31 A 04 Chapter 1 Safety 1 9 Rating plate and CE symbol The manufacturer has provided the following information on the ENS31 at the positions indicated A Serial number The manufacturer s serial number for the ENS31 is provided at this point B CE symbol The CE symbol is located at the bottom right corner of the front side CE Note i Always make reference to the ENS31 serial number in the case of inquiries orders and contracts This simplifies communication with the manuf
23. splay contains an error text Chapter 8 Attention Check the functionality of the ENS31 regularly If for example a red LED lights up constantly the ENS31 may be defective and no power is fed in also refer to Chapter 8 Note i The meaning of the error texts and error status displays are described in 7 4 Switching the system off The ENS31 cannot be switched off The unit switches to an idling state if no voltage is supplied It resumes its tasks as soon as sufficient power is available A 04 Installation and Operating Manual ENS31 Page 25 of 32 Chapter 8 Troubleshooting 8 Troubleshooting 8 1 General information In the case of repeated problems with the mains supply e g frequent deactivation due to mains overvoltage or undervoltage contact the public electricity supply authority and have the mains power quality checked at the feeding point A frequent disconnection from the mains power supply can be observed particularly in rural areas and areas with strong power fluctuations due to the proximity of industrial plants 8 2 Error indications in the LCD 8 2 1 Error status for voltage LCD indication Cause Recommended action 250 Overvoltage v150 If the mains power fluctuations m et ee eqn contact you case of fast chutdowh public electricity supply thority _130 Undervoltage in the Oe case of fast shutdown M250 Overvoltage in 10 minute average v
24. t is probably due to a TMRErr measuring error If the ENS31 does not switch on at all it must be replaced Note The ENS31 cannot be repaired on site Please inform the specialist workshop that a replacement is required A 04 Installation and Operating Manual ENS31 Page 27 of 32 Chapter 8 Troubleshooting 8 2 6 In the event of a power fluctuation one of the following texts appears in the Error texts for mains power fluctuations bottom line of the first or sixth display LCD indication Meaning P ZPJp dR 1 20 An impedance jump has been detected P ZNJp dR 1 20 P ZToHi R 9 20 The impedance is too high or too low P ZToLo R 0 99 P FToHi F 50 83 The impedance is too high or too low P FToLo F 46 83 P FrqJp dF 600 Shutdown following RoCoF value in mHz s P F Pha2 W 180 Shutdown due to too great a phase angle P F Pha2 W 200 deviation P FPha2 W 664 Phase L2 L3 inerchanged P UTHi Ua 260 0 The mains voltage is too high response time 10 minutes P UToHi U 265 3 The mains voltage is too high or too low P UToLo U 130 4 response time 200 ms P UTHi Uf 310 0 The mains voltage is too high or too low P UTLo Uf 120 3 response time 20 ms fast shutdown to protect unit stands for 1 2 or 3 and indicates the phase affected L1 L2 or L3 Page 28 of 32 Installation and Operating Manual
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