ENS31 Automatic Isolation Unit Installation Manual Issue 09
Contents
1. Installation Manual ENS31 Automatic Isolation Unit Issue 09 2005 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 post ufegmbh de web www ufegmbh de Note 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 Installation Manual is the copyright of UfE GmbH This manual is intended for the electrician It contains instructions and in formation which must not be copied distributed or transferred by techni cal data methods nor used for the purpose of competition either as an en tirety 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 The ENS31 isolation unit and the measuring method are protected by patent Page 2 of 24 Installation Manual ENS31 Version A 02 Issue 20 09 2005 Version A 02 Issue 20 09 2005 Table of Contents Stewie a ia beaNA di ca E A E E 4 1 1 General information 4 1 2 Safety symbols us2. 20 C and 40 C also refer to Chapter 5 Technical Data Contact a suitably trained electrician or the manufacture 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 24 Installation Manual ENS31 Version A 02 Issue 20 09 2005 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 Always make reference to the ENS31 serial number in the case of in quiries orders and contracts This simplifies communication with the manufacturer and prevents errors when processing requests Version A 02 Installation Manual ENS31 Page 11 of 24 Issue 20 09 2005 Chapter 2 Connections and Indicators 2 Connections and Indicators 2 1 Connections The following connections are provided at the top edge of the ENS31 D CN oo EEEIEE f____ amp J J RELAIS lt KONTAKTE SFTW TAX SOON FEET SO i A 4 connection terminals for contactor control potential free
3. mains disconnection The feedback contacts must be connected in the cor rect 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 Version A 02 Installation Manual ENS31 Page 17 of 24 Issue 20 09 2005 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 ENS31 and contactors as follows note the turning direction na N A 1 gt 2 1 2 2 L1 2 T ca gt L25 LL 5 6 5 i 6 35 21 K10 1 22 Koa o min 6A DI te max 25 A H dee R1R2R3R4 RELAY NE Note The additional pre fuse is only necessary if the direct mains power N L1 L2 L3 MAINS fuse protection exceeds 25 A Page 18 of 24 Installation Manual ENS31 Version A 02 Issue 20 09 2005 Chapter 4 Electrical Connections The terminals on the ENS31 are arranged as follows Attention The ground conductor should always bypass the unit The neutral con ductor 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 LI the delay until the contactors
4. Manual ENS31 Page 7 of 24 Issue 20 09 2005 Chapter 1 Safety 1 6 Intended use The ENS31 has been built according to state of the art technology and ac cepted 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 gen erating system On detecting over and undervoltages frequency devia tions or impedance peaks 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 li able 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 manual and e maintaining the connection and installation conditions prescribed by the manufacturer Page 8 of 24 Installation Manual ENS31 Version A 02 Issue 20 09 2005 Chapter 1 Safety 1 7 Installation and connection The unit is designed for installation in an electrical cabinet or meter cabi net If there insufficient space in the cabinets available a separate cabinet must be provided for the ENS31 and contactors Never place the cabinet containing the ENS31 above or in
5. 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 4connection terminals to connect three phases and the neutral conductor designation from left to right N L1 L2 and L3 Page 12 of 24 Installation Manual ENS31 Version A 02 Issue 20 09 2005 Chapter 2 Connections and Indicators 2 2 LCD display and LEDs The following indicators are mounted on the front side of the ENS31 A LCD The unit and 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 L1 C L2 D L3 Note li The meaning of the indicators is described in the Operating Manual Version A 02 Installation Manual ENS31 Page 13 of 24 Issue 20 09 2005 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 set ting down too hard Remove the ENS31 from the transport packaging and pull off the protec tive 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
6. 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 containing 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 24 Installation Manual ENS31 Version A 02 Issue 20 09 2005 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 219 mm 4 mm 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 litt
7. the vicinity of a heater Pay attention to sufficient ventilation Connection to the public electricity supply may only be performed by a properly qualified electrician The safety regulations of the electricity supply authority must be observed Do not place anything on the connection cable Lay all the cables so that they do not present a risk of tripping Fix all cables to the wall ceiling etc Pay attention to the cable cross section requirements for all connection cables Never attempt to repair the unit yourself Opening the unit can expose components conducting dangerously high levels of voltage Repairs may only be made by the manufacturer or an authorised specialist Danger It is forbidden to open the unit The unit can continue to conduct dangerous residual voltage some minutes after being switched off Version A 02 Installation Manual ENS31 Page 9 of 24 Issue 20 09 2005 Chapter 1 Safety 1 8 Operation Operation 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 manu facturer e when the proprietor has made constructional modifications Functional faults must be analysed immediately If necessary the pro prietor must request specialist assistance The equipment may only put into operation again when there is no doubt about its safety The ENS31 is intended for operation at room temperatures between
8. After switching on the values for voltage impedance and frequency are displayed alternately refer to the Operating Manual Version A 02 Installation Manual ENS31 Page 21 of 24 Issue 20 09 2005 Chapter 6 Technical Data 6 Technical Data Switched power max Dependent on the contactors assigned Me Plastic suitable for assembly on the top hat rail Cut out dimensions W x H 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 condi tions complying with standard DIN VDE 0126 Overvoltage gt 300 V response time 0 02 s fast shutdown fast shutdown 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 Page 22 of 24 Installation Manual ENS31 Version A 02 Issue 20 09 2005 Chapter 6 Technical Data For your notes Version A 02 Installation Manual ENS31 Page 23 of 24 Issue 20 09 2005 Chapter 6 Technical Data For your notes Page 24 of 24 Installation Manual ENS31 Version A 02 Issue 20 09 2005
9. ained personnel to work with the ENS31 isolation unit who e are familiar with the basic regulations on safety and accident preven tion e have read the operating manual the chapter on safety and the safety symbols have understood them and confirmed this with their signa ture 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 e have read and understood the operating instructions the chapter on safety and warning labels e observe the applicable regulations concerning industrial safety and ac cident 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 Version A 02 Installation Manual ENS31 Page 5 of 24 Issue 20 09 2005 Chapter 1 Safety 1 4 Guarantee and liability Our General Terms of Sale and Delivery apply The proprietor has claim to these on conclusion of the contract at the latest Rights to claims under the terms of guara
10. are activated can be up to 30 seconds because the ENS31 must test the power feed conditions again Version A 02 Installation Manual ENS31 Page 19 of 24 Issue 20 09 2005 Chapter 4 Electrical Connections 4 4 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 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 Page 20 of 24 Installation Manual ENS31 Version A 02 Issue 20 09 2005 Chapter 5 Function Test 5 Function Test 5 1 Switching the system on Switch the isolation unit on first and then the power generator feeder The 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 J 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 5 2 Indicators during operation
11. ed in this operating manual 4 L3 ObligalioniS inca 9 1 3 1 Obligations of the proprietor 5 1 3 2 Obligation of personnel 5 1 4 Guarantee andliability cccceeccesseeeeeeeeeeeesaeeees 6 1 5 Accident prevention regulations T 1 6 MEnded USE iridati 8 1 6 1 Exclusive purpose 8 1 6 2 Observe information and regulations 8 1 7 Installation ANd connection 9 1 8 OPEraliol coi ind 10 1 9 Rating plate and CE symbol 11 Connections and Indicators rien 12 2 1 CONNECIOISoe 12 2 2 LCD displays and LEDS 13 Mechanical Installation 14 3 1 Transport and unpacking 14 3 2 Conditions for installation 14 3 3 Preparing the electrical meter cabinet 15 3 4 Mounting on the top hat rall ees 15 3 5 Removing from the top hat rail 16 Electrical CONNGCUONS sssusa 17 4 1 Basic configuration 17 4 2 Demands of the switching elements 17 43 CIGUIN a aaa 18 4 4 DISCONNECHION i 20 FUNCHONICSELLRO ai 21 5 1 Switching the system ON 21 5 2 Indicators during operation reene 21 Trecnnica
12. l Data iia a ia 22 Installation Manual ENS31 Page 3 of 24 Chapter 1 Safety 1 Safety 1 1 General information This chapter contains information on safety and rules on conduct It is es sential to observe the information and rules so that any residual risks rep resented 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 4 of 24 Installation Manual ENS31 Version A 02 Issue 20 09 2005 Chapter 1 Safety 1 3 Obligations 1 3 1 Obligations of the proprietor The proprietor is obliged only to allow suitably tr
13. le force to press on the bottom housing section until the housing holder engages in the top hat rail Version A 02 Installation Manual ENS31 Page 15 of 24 Issue 20 09 2005 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 Attention Never remove the ENS31 from the top hat rail using brute force This could damage the housing holders Page 16 of 24 Installation Manual ENS31 Version A 02 Issue 20 09 2005 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 suit able 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
14. ntee 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 in terference 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 Page 6 of 24 Installation Manual ENS31 Version A 02 Issue 20 09 2005 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 day light 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 dangerous residual voltage some minutes after being switched off Version A 02 Installation
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