operating instructions surge arrester type polim · pdf fileoperating instructions surge...

Operating instructions Surge arrester Type POLIM ®-D..PI-2 Type POLIM ®-D..PI-3

Publication No. 1HC0019085 AH With ABB metal-oxide resistors

Without gaps For medium voltage metal enclosed switch-gear with plug-in type bushings cone size 2 and 3 referring to EN 50181

Mounting and installation, maintenance, transportation, storage and disposal

Issued by: Contact 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: [email protected] 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 contents is not permitted without our express consent. © ABB Schweiz AG

Operating instructions for POLIM ®-D..PI-2, POLIM®-D..PI-3 surge arrester

2 EN Doc. 1HC0019085 AH

Grounding bolt M12 or M16

Red polymer hull

Lamella contact

Silicone cone

Installation screw M8x20

Area of pressure-relief in case of overload and indication of arrester position

Installation screw M8x45

Adapter flange

Aluminium tube

Washer


Doc. 1HC0019085 AH EN 3

Table of contents

1. ABOUT THIS DOCUMENT 4

1.1. Validity 4

1.2. Target group 4

1.3. Copyright 4

2. SAFETY 5

2.1. Symbols and advices 5

2.2. Basic safety precautions 6

2.2.1. Product safety 6

2.2.2. Personnel-related measures 6

2.2.3. Organisational measures 6

3. DESCRIPTION 7

3.1. Intended use 7

3.2. Structure and function 7

3.3. Technical data 8

3.3.1. Technical data on the surge arrester 8

3.3.2. Application guidelines 9

3.3.3. Behaviour in fire 9

4. TRANSPORTATION, UNPACKING AND STORAGE 10

5. COMMISSIONING 12

5.1. Safety 12

5.2. Electrical check before commissioning 12

5.3. Installation location and protective distance 12

5.4. Mounting 13

5.4.1. Preparing for installation 13

5.4.1.1. Cleaning of silicone cone and plug-socket 13

5.4.1.2. Greasing of silicone cone 13

5.4.2. Mounting of adapter 15

5.4.3. Mounting of surge arrester without surge counter 16

5.4.4. Mounting of surge arrester with surge counter 19

5.4.5. Removal of surge arrester without surge counter 22

5.4.6. Removal of surge arrester with surge counter 24

6. MAINTENANCE, UPKEEP 26

6.1. Replacement after overloading 26

7. DISPOSAL 27


4 EN Doc. 1HC0019085 AH

1. ABOUT THIS DOCUMENT

These operating instructions are part of the POLIM®-D..PI-2, POLIM®-D..PI-3 surge arrester and describe safe and proper use for all phases of operation.

We reserve the right to make changes in the interest of further development.

1.1. Validity

These operating instructions are valid only for the POLIM®-D..PI-2, POLIM®-D..PI-3 surge arrester.

1.2. Target group

The target group of these operating instructions is professionals in the field of high-voltage technology.

The POLIM®-D..PI-2, POLIM®-D..PI-3 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 illustrations of a technical nature which may neither be utilized for competitive purposes nor passed on to others. Handing over to third parties is impermissible and liable for compensation.

All rights, including those regarding the translation, are reserved.


Doc. 1HC0019085 AH EN 5

2. SAFETY

2.1. Symbols and advices

This is a safety sign. It warns you of the danger of injury and material damage. Follow all measures marked with the safety sign to avoid injuries, death and damage to materials.

This safety sign warns you of the danger of death or serious injury from electric shocks. Follow all measures marked with the safety sign to avoid injuries and death.

� This mark indicates 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 to materials

Warnings are structured as follows:

WARNING WORD

The type and source of danger appear here

Possible consequences, which could occur if the measures are not followed, appear here.

� Impermissible actions appear here.

� Measures for avoiding the danger appear here.

The bolt of the given size shall be tightened with a torque wrench to the specified value

M8 13Nm


6 EN Doc. 1HC0019085 AH

2.2. Basic safety precautions

2.2.1. Product safety

The POLIM®-D..PI-2, POLIM®-D..PI-3 has been constructed using state-of-the-art technology and officially recognised safety-related rules. Danger to life and health of the user or third parties could arise or damage of the POLIM®-D..PI-2, POLIM®-D..PI-3 and other property could occur while the POLIM®-D..PI-2, POLIM®-D..PI-3 is in use, however.

� The POLIM®-D..PI-2, POLIM®-D..PI-3 is only to be used when it is in technical-ly sound condition, for the intended purpose, and with safety and the possible dangers in mind while observing the operating instructions.

� Keep the operating instructions intact and fully readable, and store them in such a way that they are accessible to operating personnel at all times.

� Decommission and replace overloaded or damaged POLIM®-D..PI-2, POLIM®-D..PI-3 units.

2.2.2. Personnel-related measures

� Train personnel in professional and safe working with high-voltage technology.

� Train and instruct personnel in working on the POLIM®-D..PI-2, POLIM®-D..PI-3 using the operating instructions.

� Personnel being trained, instructed or provided with general education may only work with the POLIM®-D..PI-2, POLIM®-D..PI-3 under constant supervi-sion by an experienced high-voltage technology professional.

2.2.3. Organisational measures

� Observe all safety- and danger-related information regarding the POLIM®-D..PI-2, POLIM®-D..PI-3.

� The safety rules of the owner of the high- and medium-voltage system and all regulations of the respective national safety authorities are to be observed.

� Only trained and instructed professionals may be authorised.

� Clearly assign areas of responsibility for working with the POLIM®-D..PI-2, POLIM®-D..PI-3. Make them known and adhere to them.

� Only personnel who have read and understood the operating instructions, es-pecially the "Basic safety precautions" section may be allowed to carry out ac-tivities with the POLIM®-D..PI-2, POLIM®-D..PI-3.

� Check to ensure that work is being performed in a safety-conscious way with awareness of possible dangers and while observing the operating instructions.


Doc. 1HC0019085 AH EN 7

3. DESCRIPTION

3.1. Intended use

The POLIM®-D..PI-2, POLIM®-D..PI-3 is a surge arrester intended for use in me-dium voltage metal-enclosed switchgear applications with plug-in type bushings re-ferring to EN 50181. Surge arresters protect the insulation of medium voltage de-vices against overvoltages which are caused by lightning or switching operations.

The manufacturer is not liable for resulting damages from further, unintended use. The operator accepts all responsibility for using the POLIM®-D..PI-2, POLIM®-D..PI-3 outside of its intended application range as specified in this document.

3.2. Structure and function

The POLIM®-D..PI-2, POLIM®-D..PI-3 surge arrester is constructed from serially connected, non-linear metal-oxide (MO) resistors. These MO resistors have an ex-tremely non-linear resistance property. At the maximum operating voltage of Uc, only a small capacitive current will flow in the mA range. With an increase in vol-tage, the MO resistors enter a highly-conductive state practically without delay. Thus any further increase in voltage is limited to the specified residual voltage val-ues. 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 transfers to the surrounding ambience.

The stack of MO resistors and connection equipment is held together with loops made of fiberglass-reinforced plastic. The MO resistors are enclosed by silicone to insulate against the metal housing. The aluminium housning assures optimal safe-ty for operation personnel. Plug-in surge arresters are available in cone size 2 or size 3 according to EN 50181.

Personal security: The surge arresters are mounted in a closed buildning to which only qualified personnel, working within the high power field , have access.


8 EN Doc. 1HC0019085 AH

3.3. Technical data

The technical data, dimensions and weights are specified in the following docu-ments:

• surge arrester POLIM®-D..PI-2, POLIM®-D..PI-3 in the 3273 pamphlet

• POLIM®-D..PI-2, POLIM®-D..PI-3 dimensional drawings

3.3.1. Technical data on the surge arrester

The rating plate contains the following data:

Data Meaning

POLIM®-D .. PI-2 POLIM®-D .. PI-3

Complete type designation with specification of the maximum permissible continuous operating voltage Uc and cone size

Uc = .. kV Maximum permissible continuous operating voltage Uc

Ur = .. kV Rated voltage

In = .. kA Nominal discharge current

No. HA ... Serial number

Dat. Date of manufacture


Doc. 1HC0019085 AH EN 9

3.3.2. Application guidelines

The following guidelines apply for the use of POLIM®-D..PI-2, POLIM®-D..PI-3 surge arresters:

• "Application guidelines" for medium-voltage systems, pamphlet 3021EN

3.3.3. Behaviour in fire

The silicone housing of the surge arrester is self-extinguishing, and the oxygen in-dex (LOI), measured in accordance with ASTM D 2863 and EN ISO 4589 is great-er than 35.


10 EN Doc. 1HC0019085 AH

4. TRANSPORTATION, UNPACKING AND STORAGE

Transportation

CAUTION

Surge arresters not secured during transportation

Damage to surge arresters that have fallen during transport.

� Secure surge arresters against sliding or falling before transportation.

� Observe safety precautions printed on the packaging for proper handling during transportation and storage.

Unpacking

The surge arresters provided are packaged in cardboard boxes, which shall pro-tect the arresters against damage during the transport. Observe that each surge arrester package consists of two boxes (one with the surge arrester, the other with needed accessories), which are strapped together. In case the surge arrester is delivered with surge counter another box containing the surge counter and acces-sories are provided.

� 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.

� Each arrester shall be delivered with:

1 x adapter flange

3 x installation screws, M8x20

3 x installation screws, M8x45

1 x installation grease

1 x 0,5D-M12 nut (POLIM-D®..PI-2)

2x 0,5D-M16 0.5mm nut (POLIM-D®..PI-3)

2 x washer for M16 (POLIM-D®..PI-3)

� In case the arrester is equipped with a surge counter

1 x surge counter

1 x coupling

1 x thread bolt

1 x M12 nut

1 x 0,5D-M12 nut

2 x washer for M12


Doc. 1HC0019085 AH EN 11

WARNING

Damaged surge arresters

Material damage and personal injury due to the installation and commissioning of damaged surge arresters.

� Do not use damaged surge arresters.

� Examine shipment immediately to check for damage.

� The silicone cone should be without any kind of damages such as rifts, grinded areas or impurities (particles)

� The visible black conductive layer coat must be free of damages

� The aluminium tube shall not be damaged

� Notify the insurance company, the shipper and the supplier of the damage immediately and create a damage log.

Storage

The original packaging materials can be used for storage.

� Store surge arresters in a well-ventilated, clean room.


12 EN Doc. 1HC0019085 AH

5. COMMISSIONING

5.1. Safety

DANGER

System uses high voltage

Death, serious bodily harm and damage to the switching gear may result from an electric shock.

� Allow only authorised professionals to perform work on the surge arrester.

� Observe the safety rules of EN 50110-1 before working on the system:

– Disconnect the system from the power supply.

– Secure the system against 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.

5.2. Electrical check before commissioning

Each surge arrester is tested by the manufacturer. The routine test report is in-cluded with the packaging. Additional electrical testing 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 arres-ter

Ignition of flammable materials by an arc and flying burning parts.

� Do not store flammable materials near the surge arrester.

� When working near the surge arrester, do not wear easily flammable clothing.

Plug-in surge arrester shall only be mounted in plugs with the same size. The plug sizes have to fulfil the rolerances according to DIN EN 50181 and DIN 47637.

The thickness of the mounting plate has to conform the standards DIN EN 50181 and DIN 47637 and shall not exceed 14.5mm.

Surge arresters only protect high- and medium-voltage apparatuses when they are located within the protective distance.The protective distance is only a few meters.

� Always mount surge arresters as close as possible to the apparatus to be pro-tected within the protective distance. The length of the connecting cables are decisive here.

� In cases of doubt, calculate the protective distance according to the formulas in the "Application guidelines".


Doc. 1HC0019085 AH EN 13

5.4. Mounting

CAUTION

Incorrect system voltage

Damage to the switching gear and the surge arrester.

� Do not use surge arresters intended for a.c. systems in d.c. systems.

� Observe the "Application guidelines" from ABB Switzerland Ltd.

� Before mounting, ensure that the characteristic data on the rating plate of the surge arrester matches the requirements of the power system.

� Ensure that system voltage applied at the terminals of the arrester does not exceed the maximum permissible continuous operating voltage of the surge arrester.

5.4.1. Preparing for installation

� Check that the silicone cone has no damage.

5.4.1.1. Cleaning of silicone cone and plug-socket

� Clean the silicone cone and plug-socket with Isopropyl or cable cleaning agent (from ABB).

� Let the cone and socket to dry in the air for approximately 15 minutes.

In order to achieve faultless operation, it’s important that both the plug-socket and the arrester silicone cone are clean. The cone shall be cleaned with Isopropyl or cable cleaning agent (from ABB) before installat ion .

A clean, soft and fluff-free cloth shall be moistened with Isopropyl or cable cleaning agent. Towel the cone with moderate pressure. Surplus cleaning agent can be wiped off with a dry rag. The cone will slightly swell due to this cleaning treatment but will recover within a couple of minutes. It’s therefore important to let the cone dry in the air for approximately 15 minutes before greasing.

Clean the plug-socket before operation with Isopropyl. In case of short-time dis-connection of the plug connection the grease film can be left under condition that the grease is not polluted.

5.4.1.2. Greasing of silicone cone

� Only use the enclosed installation grease.

� Apply the grease immediately before installation.

� Check that the installation grease is evently spread on the silicone cone.


14 EN Doc. 1HC0019085 AH

In order to achieve an optimal insulation between the silicone cone of the surge ar-rester and the plug-socket the cone shall be lubricated with enclosed installation grease before mounting. The grease should be applied immediately before instal-lation in order to avoid pullution. Only use the enclosed installation grease!

Cone size 2 Required amount of installation grease for each surge arrester is approximately 5g or about half of the whole packet.

Cone size 3 Required amount of installation grease for each surge arrester is approximately 10g or the whole packet.

Clean and grease the silicone cone before installation


Doc. 1HC0019085 AH EN 15

5.4.2. Mounting of adapter

� Capacitive divider connection, if provided by the switchgear manufacturer, has to be installed before the mounting of the adapter flange.

Adjust the adapter flange to desired position and fix it with the provided screws M8×45 to the designated threaded holes of the plug-socket. If the capacitive divider connection is to be used, please adjust the adapter flange in such way allowing the cable to be connected. The screws should be tighten with a tightening torque specified from the switchgear manufacturer. The screws have strength class 12.9 according to DIN-ISO 898.

M8 Tightening torque provided by switch-gear manufacturer


16 EN Doc. 1HC0019085 AH

5.4.3. Mounting of surge arrester without surge counter

CAUTION

Incorrect mounted surge arrester

Damage to the surge arrester.

� Do not turn the arrester after mounting

� Place the arrester in correct posistion before inserting the arrester in the plug-socket.

Please observe that this chapter deal with plug-in arresters without surge counters. In case the arrester shall be equipped with a surge counter please see chapter 5.4.4.

The surge arrester is delivered pre-stressed from the factory, which allows manual mounting into the plug-socket with moderate force. The standard arrester mounting postion is vertically cone upright. Other mounting positions on request.

� Insert the surge arrester in vertical position without canting or bending the lamella contact. Fix the aluminium tube (1) with the pre-assembled M8×20 screws using a tightening torque of 13 Nm. Do not turn the arrester after mounting!

� Remove the nuts, washers and the red polymer hull (2) from the grounding bolt.

� The red polymer hull shall be stored for the remova l of the Plug-in arres-ter. In case of loss new hulls can be ordered at ABB Switzerland Ltd, PTHA, Wettingen (Material No: 1HC0018814). The polymer hull is only an assembling tool.

M8 13Nm

2

1


Doc. 1HC0019085 AH EN 17

DANGER

Surge arrester with insulated terminal E


� The leakage current is connected to terminal E, which is insulated from earthed enclosure.

� The terminal E is to be connected to earth with a cable

caution



� Do not energise if this the requirement below is not fulfilled. � The red polymer hull shall never remain assembled in service

� A surge arrester is correctly mounted if about 50% or more of the area seen trough the window is red

� Check if the surge arrester is in correct position (3). There are in total six circular windows situated at the top of the aluminium tube. Only one of these windows has to be checked. A surge arrester is correctly mounted if about 50% or more of the area seen trough the window is r ed. Do not energise if this requirement is not fulfilled.

� Use a flexible ground connection lead of minimal dimension 16 mm2 (4). By using a flexible lead no counter force is applied to the spring and repositioning of the cone is avoided. Any additional forces, except the arresters own force by weight, are not accepted.

M12 or M16 40Nm

E

5a) POLIM-D®..PI-2

5b) POLIM-D®..PI-3

I II

III

3

5

4

6 Minimum 8 mm

Minimum 8mm E

6

Minimum 8mm E

6


18 EN Doc. 1HC0019085 AH

� POLIM-D®..PI-2 (5a). Fix the earth connection with the two nuts (I) & (II) and two washers. Observe that the lower nut is a 0,5D-M12 (delivered). Observe that there must be a minimum distance of 8 mm betwe en the aluminium tube and the first nut (6). The nuts have to be secured by a tighten torque of 40 Nm counter measured.

� POLIM-D®..PI-3 (5b). Fix the earth connection with the two nuts (III) and two washers. Observe that the nuts and washer to be used are 0,5D-M16 and the smaller washers (delivered). Observe that there must be a minimum dis-tance of 8 mm between the aluminium tube and the fi rst nut (6). The nuts have to be secured by a tighten torque of 40 Nm counter measured


Doc. 1HC0019085 AH EN 19

5.4.4. Mounting of surge arrester with surge counter

CAUTION



� Do not turn the arrester after mounting!

� Place the arrester in correct posistion before inserting the arrester in the plug-socket.

Please observe that this chapter deal with plug-in arresters with surge counters. In case the arrester shall not be equipped with a surge counter please see chapter 5.4.3.

The surge arrester is delivered pre-stressed from the factory, which allows manual mounting into the plug-socket with moderate force. The standard arrester mounting postion is vertically cone upright. Other mounting positions on request.

� Insert the surge arrester in vertical position without canting or bending the la-mella contact. Fix the aluminium tube (1) with the pre-assembled M8×20 screws using a tightening torque of 13 Nm. Do not turn the arrester after mounting!

� Remove the nuts, washers and the red polymer hull (2) from the grounding bolt.

� The red polymer hull shall be stored for the remova l of the Plug-in arres-ter. In case of loss new hulls can be ordered at ABB Switzerland Ltd, PTHA, Wettingen (Material No: 1HC0018814). The polymer hull is only an assembling tool.

M8 13Nm

2

1


20 EN Doc. 1HC0019085 AH

DANGER

Surge arrester with insulated terminal E for surge arrester monitoring


� The leakage current is connected to terminal E, which is insulated from earthed enclosure.

� The terminal E is to be connected to earth via monitoring instrument with a cable

caution



� Do not energise if this the requirement below is not fulfilled

� A surge arrester is correctly mounted if about 50% or more of the area seen trough the window is red

� Check if the surge arrester is in correct position (3). There are in total six circular windows situated at the top of the aluminium tube. Only one of these windows has to be checked. A surge arrester is correctly mounted if about 50% or more of the area seen trough the window is r ed. Do not energise if this requirement is not fulfilled.

� Place the coupling (5) and a washer over the insulated terminal E and screw the 0,5D-M12 or 0,5D-M16 nut as shown by (6). Observe that there must be a minimum distance of 5 mm between the aluminium tu be and the coupl-ing (4).

6

M12 or M16 40Nm

E

7

Minimum 5mm

4 8

9 5

E

3

7

6

8

9

5

Minimum 5mm

4


Doc. 1HC0019085 AH EN 21

� Screw the thread bolt into the coupling and place sensor over the bolt (7). Ob-serve that the sensor side marked with earth symbol e should face the earth connection.

� Use a flexible ground connection lead of minimal dimension 16 mm2 (9). By using a flexible lead no counter force is applied to the spring and repositioning of the cone is avoided. Any additional forces, except the arresters and sensors own force by weight, are not accepted.

� Fix the earth connection and sensor with the two M12 nuts and two washers (8). Observe that the outer nut is a 0,5D-M12 (delivered). The nuts have to be secured by a tighten torque of 40 Nm counter measured.


22 EN Doc. 1HC0019085 AH

5.4.5. Removal of surge arrester without surge counter

DANGER










� The surge arrester shall be completely removed from the plug-socket in any case of measuring cable faults or voltage measuring of the equipment.

� Remove the flexible ground leads and the nuts from the insulated terminal E bolt (1) & (2).

E

3b) POLIM-D®..PI-3

4

2

1

3a) POLIM-D®..PI-2

I

II

III

IV


Doc. 1HC0019085 AH EN 23

� POLIM-D®..PI-2 (3a). Push the red polymer hull over the grounding bolt up to-wards the bottom of the aluminium tube. Fix the hull by means of two M12- nuts and two washers. Observe that two M12 nuts, delivered with the surge arrester, are needed . The lock nut need to be counter held by a span-ner. Tighten until total resistance is noticed.

� POLIM-D®..PI-3 (3b). Push the red polymer hull over the grounding bolt up to-wards the bottom of the aluminium tube. Fix the hull by means of one M16 bult and one 0,5D-M16 bult and two bigger washers. Observe that two big-ger washes, delivered with the surge arrester, are needed. The lock nut need to be counter held by a spanner. Tighten until total resistance is noticed.

� The red colour in the window area is no longer visable (4).

� Remove the three M8x20 screws fixing the aluminium tube to the adapter flange. Observe that the arrester has to be manually secure d against fall-ing down.

� Remove the surge arrester from the plug-socket by gently pulling it out in ver-tical direction. Be careful not to damage the silicone cone.

� Store disassembled in a clean and dry environment. The silicone cone has to be protected against any type of damages.


24 EN Doc. 1HC0019085 AH

5.4.6. Removal of surge arrester with surge counter

DANGER










� The surge arrester shall be completely removed from the plug-socket in any case of measuring cable faults or voltage measureing of the equipment.

E

7

3u

4

2

1

5

6a) POLIM-D®..PI-2

I

II

III

IV

6b) POLIM-D®..PI-3


Doc. 1HC0019085 AH EN 25

� Remove the flexible ground leads and the nuts from the thread bolt (1) & (2).

� Gently remove the sensor (3).

� Remove the nut , washer (4) and the coupling (5).

� POLIM-D®..PI-2 (6a). Push the red polymer hull over the grounding bolt up to-wards the bottom of the aluminium tube. Fix the hull by means of two M12- nuts and two washers. Observe that two M12 nuts,delivered with the surge arrester, are needed . The lock nut need to be counter held by a spanner. Tighten until total resistance is noticed.

� POLIM-D®..PI-3 (6b). Push the red polymer hull over the grounding bolt up to-wards the bottom of the aluminium tube. Fix the hull by means of one M16 bult and one 0,5D-M16 bult and two bigger washers. Observe that two big-ger washes, delivered with the surge arrester, are needed. The lock nut need to be counter held by a spanner. Tighten until total resistance is noticed.

� The red colour in the window area is no longer visable (7).

� Remove the three M8x20 screws fixing the aluminium tube to the adapter flange. Observe that the arrester has to be manually secure d against fall-ing down.

� Remove the surge arrester from the plug-socket by gently pulling it out in ver-tical direction. Be careful not to damage the silicone cone.

� Store disassembled in a clean and dry environment. The silicone cone has to be protected against any type of damages.


26 EN Doc. 1HC0019085 AH

6. MAINTENANCE, UPKEEP

DANGER










The surge arresters do not contain wearing parts and are therefore maintenance-free. Replacement parts are not needed.

However, the silicone cone needs to be cleaned before mounting (see Preparing before installation, chapter 5.4.1).

6.1. Replacement after overloading

Overloading during operation can lead to damaging (e.g. traces of fire, fractures) of the surge arrester from arcs.

CAUTION

Damage to the surge arrester

Damaged surge arresters no longer protect the switchgear.

� Check the surge arresters visually on a regular basis to ensure that they are in sound condition.

� Replace damaged surge arresters.

� Keep a small percentage of installed surge arresters in reserve.


Doc. 1HC0019085 AH EN 27

7. DISPOSAL

POLIM®-D..PI-2, POLIM®-D..PI-3 surge arresters are environmentally-friendly products which must be disposed of based on the respective applicable regional regulations in an environmentally-friendly manner. The materials should be given up for recycling.

Constituent components are:

• silicone rubber (not halogenated) for the external insulation

• mounting sections and other parts made of aluminium

• metal-oxide varistors

• fibreglass-reinforced plastic lugs

• steel mounting hardware

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 over 1%: Bi2O3 and Sb2O3, which are considered to be dan-gerous substances according to EU ordinances

• percent by weight between 0.1 and 1%: NiO and Cr2O3, which are considered poisonous and dangerous materials pursuant to EU guideline 91/689/EEC

Metal-oxide varistors are coated with a thin glass coating containing lead-oxide (< 0.1% of the weight).

The substances are present as an oxide in metal-oxide varistors. A wash-out test in accordance with an EPA specification (Federal Register/vol. 45, No 98 /Rules and regulations) has shown that the sintered metal-oxide varistors can be dis-posed of as industrial waste without infringing on EEC guidelines.

No danger to personal health or the environment is present during normal opera-tion.

operating instructions surge arrester type polim · pdf fileoperating instructions surge...

Documents