Installation and Operating Instructions for Automatic Low Voltage
Contents
1. 4 0mm 4x2 5 4x4 4x6 4x10 4x16 3 x 25 16 3 x 35 16 3 x 50 25 3 x 70 35 3 x 95 50 3 x 120 70 3 x 185 95 3 x 95 50 3 x 120 70 3 x 185 95 3 x 240 120 Appendix A4 C k value settings on the reactive power controller Current Current trans former trans former ratio C k values for 400 V 3 phase smallest capacitor step power in kvar A 50 5 12 5 15 16 7 20 25 100 5 150 5 200 5 300 5 400 5 500 5 600 5 800 5 1000 5 1500 5 2000 5 2500 5 3000 5 For other rated voltages 230 V Values x 1 73 525 V Values x 0 76 690 V Values x 0 58 Condensator Dominit GmbH An der Bremecke 8 D 59929 Brilon Tel 49 0 2961 782 0 Fax 49 0 2961 782 36 www condensator dominit de info condensator dominit de CONDO B017 1004 42. g 3 1 2 Parameter setting of RVT controllers When an RVT controller is energized for the first time the Set language menu is displayed Choose the desired language with the arrow buttons and confirm with OK button 3 1 2 1 Automatic setup of RVT Choose in the Welcome menu Settings then Change mode and then Set Press the OK button to confirm then choose Commissioning then Automatic and confirm After the automatic programming is finished the target cos must be set Finally the controller must be set back to automatic mode Choose Change mode then Automatic and confirm 3 1 2 2 Manual parameter setting of RVT Choose in the Welcome menu Settings then Change mode and then Set Confirm with OK button then choose Commissioning then Guided and confirm Enter the ratio of the current transformer Iprimary Isecondary Confirm the following parameters up to target cos Set the target cos to desired value Finally the controller must be set back to automatic mode Choose Change mode and confirm Automatic 3 2 Operation of the bank The switching delay time is set to 40 seconds during factory test or in automatic programming of RVC and RVT automatically Shortening the switching delay time can lead to damage The switching time or switching delay time is to be set to minimum 60 seconds for systems in EMV en
3. 90 s already expired e ls the reactive power controller set to automatic mode e Are controller parameters set correctly see chapter 3 1 d In spite of relatively constant inductive load the system switches relatively often e Are controller parameters set correctly see chapter 3 1 e A faultis signalled although the system is functioning perfectly e A temporary but high reactive power demand may have led to a fault signal The fault signal can be acknowledged and cleared f The reactive power controller indicates that steps are switched on but the relevant contactors have not switched e Check the wiring between contactors and controller g An alarm is indicated Refer to the controller manual For RVC see chapter Alarm 4 2 Other observations a Overcurrent protection systems fuses for capacitor steps trip e Are fuses with the correct rated current fitted e Are the discharge devices okay e Is the switching delay time of the reactive power controller set correctly e ls there a short circuit or short circuit to the enclosure Do the contactors occasionally chatter b Contactors are not working e Are the contactor coils damaged e Have the corresponding fuses tripped See also the items under a c Capacitor breakdown e Have there been unusual or new load or network situations in the recent period e Have the conditions for heat dissipation of the capacitor bank or from the point of installatio
4. Installation and Operating Instructions for Automatic Low Voltage Capacitor Banks Installation and Operating Instructions for Automatic Low Voltage Capacitor Banks 1 Safety Work on and servicing of the capacitor banks may only be performed by specialised electricians 1 1 Special features of capacitors Terminals of capacitors and connected conductors and equipment within the power factor correction system are to be regarded as live parts even when being switched off residual charge 1 2 LV HRC fuses Never use fuse inserts and fuse disconnectors to switch capacitors on or off 1 3 Current transformers Power factor controller It is essential to short circuit the secondary side of the current transformer before disconnecting the power factor correction system This is performed by a short circuiting bridge on terminals K L on the control terminal strip 1 4 Transport Capacitor cubicles with reactors have a high center of gravity and can tip over Take special care when handling the capacitor bank Even a slight tilt can cause the cubicles to tip over When handling by crane the load on the lifting lugs must be vertical 2 Assembly and installation Prior to installation please check that the delivery is complete and free from damages by transport Do not perform any unauthorised modifications particularly to the controller and the ventilation system In case of a later power extension within the same cubicle or
5. ce or switching program should not be changed as the optimum program has already been set at the factory Modification may become necessary in exceptional cases only e g when the system is expanded 3 1 1 Parameter setting of RVC controllers 3 1 1 1 Automatic setup of RVC Press the Mode button twice until AUTO SET is displayed Press and button simultaneously for 5 seconds AU is flashing and the automatic procedure switches ON and OFF steps several times After the automatic setup is finished the target cos must be set to the desired value YY means inductive F means capacitive Finally the controller must be set back to automatic mode Push Mode button several times until AUTO appears 2 Condensator Dominit GmbH 3 1 1 2 Manual parameter setting of RVC Press the Mode button until MAN SET and the parameter cos is displayed Choose the desired value with and buttons Press the Mode button twice until the parameter c k is displayed Calculate and enter the C k value __Qc ___ or see Appendix A4 U J3 k Qc is the smallest capacitor steps power kvar U is the rated system voltage kV at the point of installation of the current transformer k is the ratio of the current transformer 100A 5A 20 Set back the controller to automatic mode by pushing Mode button several times until AUTO appears C k 0 6 0 7 e
6. current protection devices can be found in Appendix A1 In special cases e g with reinforced versions of reactors higher rated fuses are to be used Details can then be found in the system documentation Some types of capacitor banks do not contain any overcurrent protection facilities for the capacitor steps In these cases use the ratings stated on the type plate for the fuses Recommendations for the cross sections of the connecting lines can be found in Appendix 2 Please take into account local regulations local conditions specifications and any planned increases of compensation power 2 2 2 Measuring connections The current transformer to be used has to be designed for measuring purposes not for protection purposes The secondary rated current of the current transformer must comply with the permissible input current of the controller usually 5A The cross section of the current transformer connecting lines has to be determined to suit the rated power of the current transformer see Appendix A3 The additional power consumption of the relevant measuring input on the reactive power controller can be found in the attached description of the controller app 2VA for the 5A input of controllers RVC and RVT 2 3 Installation The capacitor bank has to be connected in accordance with the circuit diagram supplied 2 3 1 Measuring connections The measuring system of the reactive power controller must determine the reactiv
7. e power at the measuring point Its conductors are connected to a current transformer which completely measures the total load to be compensated including the current of the capacitor bank The side of the current transformer designated K P1 must face the feeding side and the side designated L P2 must face the load side The secondary terminals of the current transformer are designated k S1 and I S2 They have to be connected to the terminals of the compensation system with corresponding marking Install the current transformer in the specified phase in accordance with the wiring diagram and designate this phase L1 R Identify the other phases L2 S and L3 T of the network with a rotary field indicator taking into account that the field rotation has to be clockwise Condensator Dominit GmbH 1 Installation and Operating Instructions for Automatic Low Voltage Capacitor Banks E 2 3 2 Power connections The capacitor bank has to be connected to the network with the correct phases and with a clockwise rotating field Connect the PE and N conductors or PEN conductor to the terminals provided in the capacitor bank The connection between PE and N is necessary in a TN C system otherwise it has to be removed Refit all covers 2 3 3 Fault signalling system For external use of the alarm signals of the power factor controller there is a pair of terminals M M in the control terminal bar
8. enclosure it might be necessary to add a temperature supervision device as well as ventilation fans 2 1 Installation site Automatic capacitor banks are suitable for indoor installation and normal operating conditions according to EN 60439 IEC 60439 and VDE 0660 Part 500 Low voltage switchgear and controlgear assemblies The following ambient temperatures apply 40 C Maximum 35 C Average over 24 hours 10 C Minimum Ensure that the temperature is as low as possible and that there is sufficient air supply Maintain the specified ambient temperatures for the system Note that the system itself increases the ambient temperature Check before setting up the system that the permissible floor load is not exceeded The system is to be set up without vibration and fastened in position if necessary 2 2 Requirements for connection The rated voltage of the capacitor bank must comply with the rated voltage of the network Connect the system in accordance with the attached wiring diagram Incorrect connections are the most frequent reason for commissioning problems CONDO B017 1004 2 2 1 Power connection Fuses or short circuit current limiting circuit breakers are to be used for overcurrent protection of the connecting lines These items should generally be selected in such a way that 1 43 times the rated current of the system can be continuously carried The maximum permissible rated compensation power in relation to the over
9. hapter 4 4 Troubleshooting Please observe the notes on safety Chapter 1 and on discharging of capacitors Chapter 3 1 4 1 Reactive power controller Refer to the controller manual For RVC see chapters Testing Error messages and Troubleshooting For RVT see chapters 4 2 5 and A3 Common problems and possible reasons a The reactive power controller signals a fault and demands more compensation power b The reactive power controller signals a fault and wants to switch off capacitor steps c The reactive power controller does not switch steps on or off although there are different loads or it does not appear to switch correctly e Is the capacitor bank connected as specified in the wiring diagram Have any subsequent modifications been performed at site See also Chapters 2 3 1 and 2 3 2 e Is the cos setpoint correct e ls the expected current transformer current flowing e Have fuses for the control measuring current tripped e Has a fuse in the feeder or for the capacitor steps tripped e Are the capacitor contactors in the specified switching positions Fault signals can be acknowledged and cleared For a also clarify the following e Is there a significant loss of capacitance in any capacitor step For b also clarify the following e Are there further capacitors in the system For c also clarify the following e Has the switching delay time or zero voltage blocking time approx
10. n been fundamentally changed e ls the reactive power controller working correctly See also the items under a and b 5 Maintenance recommendations Your capacitor bank is an investment whose function you can monitor and ensure by regular maintenance If you cannot perform the recommended maintenance work yourself our sales offices will be pleased to provide assistance Please observe the notes on safety Chapter 1 and on discharging capacitors Chapter 3 1 5 1 Contacts Defective contacts in capacitor circuits can cause sparkling whose high frequency oscillations overload the capacitors It is therefore recommended that all contacts fuses screw and plug connections terminals in capacitor banks be checked during inspection and fastened if found to be vibrating When the switching frequency is extremely high also check the switching contacts in the capacitor contactors 5 2 Air supply The air intake and outlet openings and any filter tissues are to be checked for contamination and cleaned if necessary In capacitor banks with fans check the function and control of fans regularly 5 3 Discharge devices Defective discharge systems can lead to impermissible loads for almost all the equipment in the capacitor bank It is therefore advisable to check their function during inspections The amount of work required is not much e Switch the capacitor step on e Switch the capacitor step off e After at least 40 seconds mea
11. of the capacitor bank These terminals are connected with a floating contact which is closed if e the desired cos is not reached Target cos for RVC Alarm cos for RVT e A voltage disconnection is present e Analarm threshold is violated RVC RVT e The internal temperature of the controller is above 85 C Please also refer to the controller manual 3 Commissioning Check the electrical and mechanical connections Perform a visual check before commissioning the system e Have all tools been removed e Have all covers been refitted 3 1 Setting the reactive power controller and energizing the system To start the commissioning open the short circuit bridges on the CT terminals and the terminals k and of the control terminal bar Switch on the overcurrent protection of the Control voltage circuit and energize the capacitor bank The controller display becomes active The following procedure depends on the type of controller The majority of nowadays available power factor controllers provide an automatic self programming function please refer to the controller manual If the automatic programming fails the programming must be made manually For this procedure please refer to the controller manual In order to achieve a short commissioning even when manual programming is necessary the controllers are pre programmed during the factory test except the values for current sensitivity and desired cos 9 The switching sequen
12. sure the voltage between all the capacitor terminals on the relevant contactor When the discharge device is functioning correctly a residual DC voltage of less 0 1 x rated voltage is measured If the discharge system is defective a residual DC voltage of gt gt 0 1 x rated voltage which can be over 1 kV in extreme cases may be measured 5 4 Control function Performance of a functional test as set out in Chapter 3 2 is and protection For RVT see chapters 4 2 3 2 Protections recommended to verify the control function of the 4 2 3 4 Alarm and 4 3 Alarm logging compensation system CONDO B017 1004 Condensator Dominit GmbH 3 Installation and Operating Instructions for Automatic Low Voltage Capacitor Banks ELLE a ae Appendix A1 Maximum permissible rated compensation power for 400 V 3 phase in relation to external fuses without reactor with reactor or LA LB L070 max kvar max kvar with reactor with reactor with reactor L140 LL1 LL2 max kvar max kvar max kvar with reactor L125 max kvar with reactor L057 max kvar For other rated voltages 230 V Values 1 73 525 V Values 0 76 690 V Values 0 58 Appendix A2 Extract from DIN VDE 0100 Terminal cross section mm Appendix A3 Losses in Cu conductors Losses W for 5A with cross section 1 5mm 2 5mm 4 0mm for 1A with cross section 1 5mm 2 5mm
13. vironments classified as residential areas After returning to automatic bank mode e When correctly connected and when there is a need for compensation the reactive power controller indicates that it will activate a capacitor step e The capacitor steps are connected in accordance with the set switching delay time until the specified cos is achieved Note Automatic capacitor banks contain discharge facilities which achieve discharge to 10 of rated voltage or less within 40 seconds of a capacitor being switched off Note Capacitors must be discharged to at least 10 of rated voltage before reconnection and therefore e do not operate contactors manually e donot reduce the switching delay times e do not perform any work on the control circuit when it is live CONDO B017 1004 Installation and Operating Instructions for Automatic Low Voltage Capacitor Banks eS eel 3 3 Functional testing A functional test of the system and potentially necessary troubleshooting are described in the controller manual For RVC see chapters Testing Error messages and Troubleshooting For RVT see chapters 4 2 5 and A3 Note Too many steps switched on can lead to over compensation i e increased voltage particularly under low load Not sufficient compensation power switched on can lead to overloading of the feeder particularly under heavy load If the system fails the functional test see C
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