ABB POLIM-D Operating Instructions Manual Download Page 13

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ABB

Operating instructions for POLIM

-D surge arrester

Doc. 1HC0010173 AB

5.5. Earthing

Observe national regulations and the requirements of the system owner.

Connect surge arresters to the system ground via the shortest path.

Surge arresters equipped with disconnecting device shall be connected to

earth by a stranded wire. One side of the earth wire shall be connected to the
disconnecting device the other side shall be connected to earth nearby the
mounting position of the insulating bracket.

Observe recommended minimum diameters for POLIM

-D:

Copper

dia. 20 mm

Aluminum

dia. 40 mm

Summary of Contents for POLIM-D

Page 1: ...tact information ABB Switzerland Ltd High Voltage Products Surge Arresters Jurastrasse 45 CH 5430 Wettingen 1 Phone 41 0 58 585 29 11 Telefax 41 0 58 585 55 70 E Mail sales sa ch abb com Internet www abb com arrestersonline We reserve the right to make changes We reserve all rights to this document and the object presented within Reproduction passing on to third parties or utilisa tion of the cont...

Page 2: ...e surge arrester 7 3 3 2 Application guidelines 8 3 3 3 Recommended torques and screw in depths 8 3 3 4 Behaviour in fire 8 4 TRANSPORTATION UNPACKING AND STORAGE 9 5 COMMISSIONING 10 5 1 Safety 10 5 2 Electrical check before commissioning 10 5 3 Installation location and protective distance 10 5 4 Mounting 11 5 4 1 System voltage 11 5 4 2 Installation position 11 5 4 3 Minimum distances between s...

Page 3: ...e field of high voltage technology The POLIM D may only be commissioned and maintained by persons instructed in proper use and handling 1 3 Copyright The copyright of these operating instructions belongs to ABB Switzerland Ltd These operating instructions are to be handled confidentially and are intended solely for mounting operating and monitoring personnel They contain regulations and illustrati...

Page 4: ...icates that an action is to be performed Warnings in these operating instructions indicate special dangers and list meas ures for prevention of the danger There are three levels of warning Warning word Meaning DANGER Immediate impending endangerment of your life and health WARNING Possible impending endangerment of your life and health CAUTION Possible impending danger of light injuries or damage ...

Page 5: ... safe working with high voltage technology X Train and instruct personnel in working on the POLIM D using the operating instructions X Personnel being trained instructed or provided with general education may only work with the POLIM D under constant supervision by an experienced high voltage technology professional 2 2 3 Organisational measures X Observe all safety and danger related information ...

Page 6: ...oltage the MO resistors en ter a highly conductive state practically without delay Thus any further increase in voltage is limited to the specified residual voltage values After the decline of the overvoltage the arrester immediately turns back to the non or slightly conductive state The MO arrester converts the energy of the surge into heat which it trans fers to the surrounding air The stack of ...

Page 7: ...POLIM D dimensional drawings Drawings of accessories 3 3 1 Technical data on the surge arrester The rating plate molded into the silicone housing contains the following data Data Meaning POLIM D Type designation In kA Nominal discharge current In IEC P CL kA Rated short circuit current Is for 0 2 sec Additional data is engraved Data Meaning Uc kV maximum permissible continuous operating voltage Uc...

Page 8: ... surge arrester only 3 3 3 Recommended torques and screw in depths The specified values in the table below apply for steel bolts of strength class 8 8 in aluminum nut threads Thread Position Torque Nm Minimum screw in depth mm Maximum screw in depth mm M12 top connection 48 18 25 M12 top connection without socket 48 18 20 5 M12 bottom connection 48 18 20 5 M12 bottom connection without socket 48 1...

Page 9: ...talled unless specifically or dered otherwise The routine test reports for the final electrical inspection are in cluded in the packaging material X After receiving the shipment compare the order and delivery documents im mediately to check for completeness and accuracy of the shipment In case of incompleteness or deviations inform the supplier and shipper immediately WARNING Damaged surge arreste...

Page 10: ...ng before commissioning is not necessary 5 3 Installation location and protective distance DANGER Danger of fire and injury via arc with overloading of the surge ar rester and when disconnecting device is disconnecting the surge arrester Ignition of flammable materials by an arc and flying burning parts X Do not store flammable materials near the surge arrester X When working near the surge arrest...

Page 11: ...d Ltd X Before mounting ensure that the characteristic data on the rating plate of the surge arrester matches the requirements of the power system X Ensure that system voltage applied at the terminals of the arrester does not exceed the maximum permissible continuous operating voltage of the surge arrester 5 4 2 Installation position CAUTION Deposits on the undersides of sheds Conductivity of depo...

Page 12: ...plication bolts nuts bolt locks any required balancing washers The ordered mounting accessory is already mounted to the surge arrester in most cases If the mounting accessory hase been ordered and delivered separately it shall be mounted according to the enclosed instruction drawing data sheet or di mensional drawing X Surge arrester with disconnecting device Mount insulating bracket at vertical s...

Page 13: ...system ground via the shortest path X Surge arresters equipped with disconnecting device shall be connected to earth by a stranded wire One side of the earth wire shall be connected to the disconnecting device the other side shall be connected to earth nearby the mounting position of the insulating bracket X Observe recommended minimum diameters for POLIM D Copper dia 20 mm2 Aluminum dia 40 mm2 ...

Page 14: ...gainst being switched on again Ensure that the system is de energised Earth the system and short circuit it Cover or cordon off neighbouring energised parts The surge arresters do not contain wearing parts and are therefore maintenance free Replacement parts are not needed 6 1 Disconnecting device DANGER Tripping of disconnecting device Risk of injury due to inappropriate handling Do not expose th...

Page 15: ...rge arresters when disconnecting device has operated X Replace damaged surge arresters X Keep a small percentage of installed surge arresters in reserve 6 3 Cleaning in case of heavy pollution Thanks to the hydrophobicity of the silicone housing normal pollution does not af fect the insulation capacity of the housing If pollution exceeding this is present heavy deposit layer the surge arrester sho...

Page 16: ...sconnecting device The remaining parts of a disconnecting device which has tripped can be recycled Silicone rubber not halogenated The silicone rubber can break down into SiO2 and CO2 thus uncovering the en cased metal oxide varistors Metal oxide varistors The metal oxide varistors are sintered ceramics consisting up to 90 of ZnO The following additions are also contained within percent by weight ...

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