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Summary of Contents for ABB POLIM
- Page 1 — O P E R AT I N G I N S T R U C T I O N S Surge arresters Types POLIM® and MWK/MWD...
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Page 2: Table Of Contents
Installation location and protective distance ..............8 Mounting ..........................9 5.4.1 System Voltage ........................9 5.4.2 Connections .......................... 9 5.4.3 Mounting grading ring (POLIM-I, -S, -H only) ..............10 5.4.4 Transportation during mounting..................11 5.4.5 Installation position ......................11 5.4.6 Distances between surge arresters and earth .............. 12 5.4.7... -
Page 3: About This Document
Language of the original operating instructions: English Validity These operating instructions are valid for all the POLIM® and MWK/MWD type surge arresters, with the exception of the POLIM-D .. PI-2/-3 plug-in type (separable) surge arresters. The operating instructions of POLIM-D .. PI-2/-3 are available in the document 1HC0019085. -
Page 4: Basic Safety Precautions
The POLIM® and MWK/MWD type surge arresters are only to be used when they are in technically sound condition, for the intended purpose, and with safety and the possible dangers in mind while observing the operating instructions. -
Page 5: Structure And Function
Structure and function The POLIM® and MWK/MWD type surge arresters are constructed from metal-oxide (MO) resistors. These MO resistors have an extremely non-linear voltage-current characteristic. At the continuous operating voltage of U , the metal-oxide material acts almost as an insulator and only a small capacitive current will flow, which is in the mA range. -
Page 6: Application Guidelines
– – disconnector disconnecting device Material pairing: steel bolts and steel nuts class 8.8 of some clamping accessories 3.3.4 Behaviour in fire The silicone housing of POLIM® and MWK/MWD type arresters is self-extinguishing. Operating instructions | EN | 1HC0141361 AA... -
Page 7: Transporting, Unpacking And Storage
Transporting, unpacking and storage Transporting CAUTION! Surge arresters not secured during transportation Damage to surge arresters that have fallen during transport. Secure the surge arresters against sliding or falling before transportation. Observe the safety precautions printed on the packaging for proper handling during transportation and storage. -
Page 8: Commissioning
à Cover or cordon off neighbouring energised parts. Electrical checking before commissioning Each POLIM® and MWK/MWD surge arrester is tested by the manufacturer. The log of the electrical test is included with the packaging. Additional electrical testing before commissioning is not necessary. -
Page 9: Mounting
Mounting 5.4.1 System voltage WARNING! Surge arrester connected to the system during insulation tests The test voltage applied to the equipment during insulation tests may damage the surge arrester. Disconnect surge arrester from the system during insulation tests. CAUTION! Incorrect system voltage or technical data Damage to the system and the surge arrester. -
Page 10: Mounting Grading Ring (Polim-I, -S, -H Only)
Mount the insulating bracket at vertical surface (wall, column, tower). Use a flexible connection between disconnector and earth. Connect the earth conductor to the stud of the disconnecting device. 5.4.3 Mounting grading ring (POLIM-I, -S, -H only) Connection bolt Cover Support... -
Page 11: Transportation During Mounting
Installation position CAUTION! Deposits on the undersides of sheds Conductivity of deposits hinders protective function of the POLIM® and MWK/MWD type surge arresters. Always mount surge arresters in a way that the sheds point downward. The top and bottom connections could be either ground or high-voltage terminals as long as the sheds point downwards. -
Page 12: Distances Between Surge Arresters And Earth
Earthed installation If no surge arrester monitoring devices such as surge counters and/or milliammeters were supplied, the POLIM® and MWK/MWD type surge arresters are to be mounted earthed. Bolt surge arresters directly to the earthed frame or foundation. Use the centering washers (if supplied) when fixing the mounting plate. -
Page 13: Earthing
Ensure selection of suitable material pairs. Observe recommended cross-sections: Recommended cross-section Recommended cross-section Surge arrester type for copper [mm²] for aluminum [mm²] MWK/MWD, POLIM-C..N, -C..ND, -C..LB POLIM-R POLIM-D POLIM-C..HD POLIM-H..ND, -H..SD POLIM-I POLIM-X POLIM 4.5 ID POLIM-K POLIM-S POLIM-H..N... -
Page 14: Cleaning In Case Of Heavy Pollution
Cleaning in case of heavy pollution Thanks to the hydrophobicity of the silicone housing, normal pollution does not affect the insulation capacity of the housing. In case of excessive pollution (heavy deposit layer) the surge arrester should be de-energised and then cleaned (see chapter 6.1 for safety precautions). -
Page 15: Disposal
Disposal POLIM® and MWK/MWD type surge arresters are environmentally-friendly products. They must be disposed of in accordance with regional environmental regulations. Their materials are suitable for recycling. Constituent components are: ƒ Silicone rubber (not halogenated) for the external insulation ƒ Terminals and other parts made of aluminium ƒ... - Page 16 ABB Switzerland Ltd. prior notice. With regard to purchase orders, PGHV the agreed particulars shall prevail. ABB does Division Surge Arresters not accept any responsibility whatsoever for Jurastrasse 45 potential errors or possible lack of information in this document.