ABB POLIM User manual

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OPERATING INSTRUCTIONS
Surge arresters
Types POLIM® and MWK/MWD

1 About this document.............................................................................................. 3
1.1 Validity................................................................................................................................... 3
1.2 Target group......................................................................................................................... 3
2 Safety ....................................................................................................................... 3
2.1 Symbols and warnings ........................................................................................................ 3
2.2 Basic safety precautions .................................................................................................... 4
2.2.1 Product safety...................................................................................................................... 4
2.2.2 Personnel-related measures .............................................................................................. 4
2.2.3 Organisational measures.................................................................................................... 4
3 Description ..............................................................................................................4
3.1 Intended use ......................................................................................................................... 4
3.2 Structure and function........................................................................................................ 5
3.3 Technical data ...................................................................................................................... 5
3.3.1 Technical data on the surge arrester ................................................................................ 5
3.3.2 Application guidelines ........................................................................................................ 6
3.3.3 Recommended torques and screw-in depths .................................................................. 6
3.3.4 Behaviour in fire................................................................................................................... 6
4 Transporting, unpacking and storage.................................................................. 7
4.1 Transporting......................................................................................................................... 7
4.2 Unpacking ............................................................................................................................. 7
4.3 Storage.................................................................................................................................. 7
5 Commissioning .......................................................................................................8
5.1 Safety..................................................................................................................................... 8
5.2 Electrical checking before commissioning ...................................................................... 8
5.3 Installation location and protective distance.................................................................. 8
5.4 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 Earthed installation........................................................................................................... 12
5.4.8 Insulated installation......................................................................................................... 12
5.5 Earthing............................................................................................................................... 13
6 Maintenance .......................................................................................................... 13
6.1 Safety................................................................................................................................... 13
6.2 Cleaning in case of heavy pollution................................................................................. 14
6.3 Replacement after overloading or damages caused by animals................................. 14
6.4 Disconnecting device ........................................................................................................ 14
7 Disposal.................................................................................................................. 15
2 | Operating instructions | EN | 1HC0141361 AA
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Content

1 About this document
These operating instructions are applicable to the POLIM® and MWK/MWD type surge
arresters. These instructions describe the safe and proper use for all phases of operation.
Language of the original operating instructions: English
1.1 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.
Representative samples of the products are shown on the front page.
1.2 Target group
The target group of these operating instructions is professionals in the field of high-
voltage technology.
Surge arresters may only be commissioned and maintained by persons instructed in the
proper use and handling of the surge arresters.
2 Safety
2.1 Symbols and warnings
Important information and technical notes are emphasised in order to illustrate the correct
operation.
Symbol Meaning
This is a warning sign. It warns you of the danger of injury or death and/or
material damage. Follow all measures marked with such warning signs to avoid
injuries, death and damage to materials.
This sign warns you of the danger of death or serious injury from electric shocks.
Follow all measures marked with such warning signs to avoid injuries and/or
death.
XThis mark indicates that an action is to be performed.
Warning signs in these operating instructions indicate special dangers and list measures
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 the danger are listed here.
Possible consequences, which could occur if the measures are not followed, are
listed here.
XMeasures for avoiding the danger are listed here.
1HC0141361 AA | EN | Operating instructions | 3

2.2 Basic safety precautions
2.2.1 Product safety
The POLIM® and MWK/MWD type surge arresters have been constructed using state-of-the-
art technology and officially recognised safety-related rules. However, while they are in use,
danger to life and health of the user or third parties could arise, or damage of the surge
arresters and other property could occur.
XThe 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.
XKeep the operating instructions intact and fully readable, and store them in such a way
that they are accessible to operating personnel at all times.
XDecommission and replace overloaded or damaged surge arrester units.
2.2.2 Personnel-related measures
XTrain personnel in professional and safe working with high-voltage equipment.
XTrain and instruct personnel in working on the POLIM® and MWK/MWD type surge
arresters using the operating instructions.
XPersonnel being trained, instructed or just provided with a general education may only
work with the POLIM® and MWK/MWD type surge arresters under constant supervision by
an experienced high-voltage technology professional.
2.2.3 Organisational measures
XObserve all safety- and danger-related information regarding the POLIM® and MWK/MWD
type surge arresters.
XThe 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.
XOnly trained and instructed high-voltage technology professionals may be authorised to
work independently with the POLIM® and MWK/MWD type surge arresters.
XClearly assign areas of responsibility for working with the POLIM® and MWK/MWD type
surge arresters. Make them known and adhere to them.
XOnly personnel who have read and understood the operating instructions, especially the
„Basic safety precautions“ section, may be allowed to carry out tasks with the POLIM®
and MWK/MWD type surge arresters.
XEnsure that work is being performed in a safety-conscious way with awareness of
possible dangers and while observing the operating instructions.
3 Description
3.1 Intended use
The POLIM® and MWK/MWD type surge arresters are intended for use in high-, medium- and
low-voltage applications.
Surge arresters protect the insulation of devices 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® and MWK/MWD type surge
arresters outside of their intended application range as specified in this document or in the
respective data sheet.
Note: MWD and POLIM® 4.5 ID surge arresters are designed for indoor use. All other POLIM®
and MWK type surge arresters are suitable for use outdoors and indoors.
4 | Operating instructions | EN | 1HC0141361 AA

3.2 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 Uc, the metal-oxide material acts almost as an
insulator and only a small capacitive current will flow, which is in the mA range. With an
increase in voltage, the MO resistors enter a low-ohmic 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 high-ohmic
state. The surge arrester converts the energy of the surge into heat and transfers it to the
surrounding air.
The stack of MO resistors and electrodes is held together with fiberglass-reinforced plastic
elements. A directly molded silicone housing protects it against environmental influences.
Surge arresters may optionally be equipped with a disconnecting device. Such a device
disconnects automatically the surge arrester from the power network in case of an
overload.
3.3 Technical data
Performance characteristics, dimensions, weights and installation
distances of the POLIM® and MWK/MWD type surge arresters are
specified in the data sheets, see:
https://new.abb.com/high-voltage/surge-arresters/medium-
voltage-arresters
The corresponding dimensional drawings of the products and/or
their accessories are available on request.
3.3.1 Technical data on the surge arrester
Main characteristic data are partly molded into the silicone housing and partly engraved in
the electrodes.
Note: AC surge arresters are not suitable for use in DC applications. DC surge arresters have
a D at the end of their name.
Detailed information on this is given in the examples below:
POLIM-D 10-04 aType designation
sUcin kV
dHousing size
fHousing type designation
gDesignation for special housing or DC type (D=DC, other letters
refer to the housing, not used if AC and standard housing)
h1: one MO resistor, 2: two parallel MO resistors
jPosition only used in case of special housing (K4, KLL)
a s d
POLIM-C 1.8 N D
a s f g
POLIM-R 0.14-2 N D
a s h fg
MWK 24 K4
a s j
Labeling Meaning
Uc= ... kV Continuous operating voltage Ucin kVrms; DC types: Uc= Ur
Ur= ... kV Rated voltage Urin kVrms; DC types: Uc= Ur
In= ... kA Nominal discharge current Inin kA
Is= ... kA Rated short-circuit current Isfor 0.2 sec in kArms
HA... Serial number (8 digits; the ‘HA’ might be omitted for space
reasons), also included in the QR code
20... Year of manufacture
Class IEC DH (POLIM-D)
IEEE DIST Class HD (POLIM-D .. R)
Class IEC SL (POLIM-K, MWK/MWD,
POLIM-C AC types)
Class IEC SL, SM or SH
for POLIM-I, -S or -H, respectively
DC-A/-B/-C
Designation of arrester classification
Charge transfer class (DC types only)
1HC0141361 AA | EN | Operating instructions | 5

3.3.2 Application guidelines
The following guidelines apply for the use of surge arresters in medium-voltage systems
and in railway applications:
“Application guidelines Overvoltage protection: Dimensioning, testing and application of
metal oxide surge arresters in medium-voltage systems”, document 1HC0075561
“Application guidelines Overvoltage protection: Dimensioning, testing and application of
metal oxide surge arresters in railway facilities”, document 1HC0075573
3.3.3 Recommended torques and screw-in depths
Thread Arrester type Position Required
torque [Nm]
Screw-in depth [mm]
min. max.
Material pairing: steel bolts class 8.8 in aluminum threads of arrester electrodes
M10 POLIM-H support on grading
ring (if present) 25 10 10
M10 POLIM-H SD top connection 30 16 16
M10 POLIM-R top connection 30 16 16
M10 POLIM-X top connection 30 15 16
M12 MWK/MWD top & bottom 50 18 23.5
M12 POLIM-C top connection 50 16 20
M12 POLIM-C bottom connection 50 16 16
M12 POLIM-C .. LB top & bottom 30 – –
M12 POLIM-D/-K/4.5 ID top connection 50 20 25
M12 POLIM-D/-K bottom connection 50 20 20
M12 POLIM-D without lug top connection 50 17 17
M12 POLIM-D without lug bottom connection 50 12 12
M12 POLIM-I top & bottom 50 14 14
M12 POLIM-H top & bottom 50 14 20
M12 POLIM-X bottom connection 50 18 25
M16 POLIM-I/-S/-H top connection 100 25 25
M16 POLIM-I/-S/-H bottom connection 100 25 40
M16 POLIM-X top connection 100 23 24
M16 POLIM-X bottom connection 100 23 25
Attachment of a disconnecting device (POLIM-D/-K only)
M10 &
M12
POLIM-D/-K
disconnector
threads at the
disconnecting device 20 – –
Material pairing: steel bolts and steel nuts class 8.8 of some clamping accessories
M6 10
M8 25
M10 50
M12 75
M16 160
3.3.4 Behaviour in fire
The silicone housing of POLIM® and MWK/MWD type arresters is self-extinguishing.
6 | Operating instructions | EN | 1HC0141361 AA

4 Transporting, unpacking and storage
4.1 Transporting
CAUTION!
Surge arresters not secured during transportation
Damage to surge arresters that have fallen during transport.
XSecure the surge arresters against sliding or falling before transportation.
XObserve the safety precautions printed on the packaging for proper handling during
transportation and storage.
XDon’t expose the disconnectors or surge arresters equipped with disconnecting devices
to temperatures above +60 °C (for exceptions, see specific product documentation).
4.2 Unpacking
The surge arresters provided are packaged in sturdy cardboard boxes or wooden crates.
If accessories are included in the order, the surge arresters are supplied with accessories
installed. If specifically requested, accessories are packaged separately in plastic bags and
are either included in the cardboard box or wooden crate or supplied separately in case of
large quantities.
The routine test reports for the final electrical inspection are included in the packaging
material.
XAfter receiving the shipment, compare the order and delivery documents immediately to
check for completeness and correctness of the shipment.
XIn case of incompleteness or deviations, inform the supplier and shipper immediately.
Packaging material is one-way unless stated otherwise. It shall be disposed of or recycled
according to local regulations.
WARNING!
Damaged surge arresters
Material damage and personal injury due to the installation and commissioning of damaged
surge arresters.
XDo not use damaged surge arresters.
XExamine shipment immediately to check for damage.
XImmediately notify the insurance company, the shipper and the supplier of the damage
and create a damage log.
4.3 Storage
The original packaging materials can be used for storage.
XStore the surge arresters in a well-ventilated, clean room.
XRemove the plastic film to prevent the formation of condensation water.
Storage temperature: –40 ... 70 °C
Storage temperature for disconnectors or surge arresters equipped with disconnecting
devices: –40 ... 60 °C (for exceptions, see specific product documentation).
1HC0141361 AA | EN | Operating instructions | 7

5 Commissioning
5.1 Safety
DANGER!
System uses high-voltage
Electric shock may cause death, serious injury and damage to the system.
XAllow only authorised professionals to perform work on the surge arrester.
XObserve the safety rules of EN 50110-1 or equivalent local standards on the “Operation of
Electrical Installations” before working on the system:
àDisconnect the system from the power supply.
àSecure the system against being switched on again.
àEnsure that the system is de-energised.
àGround the system and short-circuit it.
àCover or cordon off neighbouring energised parts.
5.2 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.
5.3 Installation location and protective distance
DANGER!
Danger of fire and injury due to arc and ejected parts when electrically overloading the
surge arrester and when the disconnecting device, if installed, is disconnecting the surge
arrester
Ignition of flammable materials by an arc or ejected hot parts
XDo not store flammable materials near the surge arrester.
XWhen working near a surge arrester, do not wear easily flammable clothing.
Surge arresters only protect high-voltage apparatuses when they are located within the
protective distance, as defined in the surge arrester application guidelines (see chapter
3.3.2 above).
XAlways mount surge arresters as close as possible to the apparatus to be protected
within the protective distance. The length of the connection cables is decisive here.
XIf in doubt, calculate the protective distance according to the formulas in the surge
arrester application guidelines (see chapter 3.3.2 above).
Additionally, for surge arresters equipped with disconnecting devices, the following app-
lies:
XUse surge arresters equipped with a disconnecting device in outdoor installations only.
XUse the disconnecting device with the intended surge arrester only. The disconnecting
devices are different for each surge arrester type.
XEnsure that a safe insulating distance will be created and maintained between the
connection lead and the disconnecting device in case of disconnection.
8 | Operating instructions | EN | 1HC0141361 AA

5.4 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.
XDisconnect surge arrester from the system during insulation tests.
CAUTION!
Incorrect system voltage or technical data
Damage to the system and the surge arrester. The test voltage applied to the equipment
during insulation tests may damage the surge arrester.
XDo not use surge arresters intended for AC systems in DC systems.
XConsult the manufacturer for the application of surge arresters intended for DC systems
in AC systems.
XObserve the “Application guidelines” as mentioned in chapter 3.3.2 above.
XBefore mounting, ensure that the characteristic data on the surge arrester matches the
requirements of the power system.
XEnsure that the system voltage applied at the terminals of the arrester does not exceed
the continuous operating voltage Ucof the surge arrester.
5.4.2 Connections
The top end is generally intended for connection to the high-voltage and the foot end/floor
plate is generally to be connected to the system ground.
The base or foundation for the surge arrester must be flat, clean and suitable for the loads
that arise.
The following parts made of stainless or galvanised steel are to be provided by the
customer depending on the application:
Bolts
Foundation 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 has been ordered and delivered separately, it must be mounted
according to the enclosed instruction, data sheet or dimension drawing.
The use of a counter tool at the same electrode is advised when accessories are tightened
to the top or bottom connection.
Furthermore, it is recommended to use a flexible connection on one terminal of the surge
arrester to minimise mechanical stress on the active part.
Careful consideration of the potential consequences associated with the installation of a
surge arrester as a supporting post is necessary.
Surge arrester without disconnecting device
XEnsure selection of suitable material pairs.
XConnect the earth conductor to the ground terminal of the surge arrester.
XConnect the high-voltage conductor to the high-voltage terminal of the surge arrester.
XObserve the recommended torques and the screw-in depths (see chapter 3.3.3).
XWhen tightening a bolt, the torque must be countered by a spanner at the same terminal
to minimise torque or bending forces on the surge arrester.
XCarefully clean the contact surfaces before mounting and lubricate with acid-free contact
grease.
1HC0141361 AA | EN | Operating instructions | 9

Surge arrester with disconnecting device
DANGER!
Tripping of disconnecting device
Risk of injury due to inappropriate handling.
XDo not expose the disconnecting device to temperatures above 60 °C (for exceptions, see
specific product documentation).
XNever try to open the disconnecting device.
XDo not connect any voltage/energy source to the terminals of the disconnecting device.
XMount the insulating bracket at vertical surface (wall, column, tower).
XUse a flexible connection between disconnector and earth.
XConnect the earth conductor to the stud of the disconnecting device.
5.4.3 Mounting grading ring (POLIM-I, -S, -H only)
1
2
4
3
5
1 Connection bolt
2 Cover
3 Support
4 Grading ring
5 Countersunk screw
If your surge arrester has a grading ring, you must mount the grading ring.
XEnsure that the surge arrester cannot topple over.
XPlace the grading ring (4) over the surge arrester with the mounting holes towards the
top.
XScrew out the connection bolt (1) approx. 11 mm with a fork wrench.
XLift the cover (2) slightly.
XPlace the three supports (3) of the grading ring into the intended cut-outs between
cover (2) and surge arrester.
XScrew in the connection bolt (1) with a fork wrench, but do not tighten it yet.
XScrew the grading ring (4) onto the supports with countersunk screws M10 (5).
XTighten the connection bolt (1) to a torque of 100 Nm.
XTighten the countersunk screws (5) at the grading ring to a torque of 25 Nm.
10 | Operating instructions | EN | 1HC0141361 AA

5.4.4 Transportation during mounting
Depending on weight and installation location of the surge arrester, a crane may be
necessary for mounting. The crane ropes can be fastened in the following ways, depending
on the surge arrester model:
Fastening to accessories Fastening via ring bolt
(if fastening to accessories
is not possible)
Fastening to grading ring
(if present)
Figure 1 Figure 2 Figure 3
Fastening to accessories
XHook the rope as shown in Figure 1.
Fastening via ring bolt
XRemove top accessories from surge arrester.
XScrew the ring bolt into threaded hole M16x25.
XHook the rope as shown in Figure 2.
Fastening to grading ring
XHook the three ropes in the three supports of the grading ring and the hook of the crane
as shown in Figure 3.
5.4.5 Installation position
CAUTION!
Deposits on the undersides of sheds
Conductivity of deposits hinders protective function of the POLIM® and MWK/MWD type
surge arresters.
XAlways 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. In case of doubt please consult ABB.
1HC0141361 AA | EN | Operating instructions | 11

5.4.6 Distances between surge arresters and earth
The recommended distances between the surge arresters and the earth are specified on
the data sheets supplied with the quotation or order confirmation. The values are based on
calculations for unfavourable conditions and include safety margins.
XObserve national regulations and the rules of the system owner.
Surge arrester with disconnecting device
XEnsure that the mounting position of a surge arrester equipped with a disconnecting
device is such that a disconnected earth wire can swing freely and in this case no flash
over will occur between the bottom connection and earth.
5.4.7 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.
XBolt surge arresters directly to the earthed frame or foundation. Use the centering
washers (if supplied) when fixing the mounting plate.
XConnect the earth connection of the surge arrester to its base plate tap.
Earthed installation of POLIM 4.5 ID
The POLIM®4.5 ID surge arrester is to be mounted earthed.
XMount the metallic side bars of the surge arresters directly to the earthed frame.
XConnect both side bars of the surge arrester to earth.
XUse flexible connection and connect the high-voltage connection with the top terminal of
the surge arrester.
XObserve recommended torques (see chapter 3.3.3 above).
XCarefully clean contact surfaces before mounting and lubricate them with acid-free
contact grease.
XEnsure selection of suitable material pairs.
5.4.8 Insulated installation
If 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 insulated.
XMount surge arresters with the included loose insulators made of cast resin on the
earthed frame or foundation according to the dimensional drawing.
XMount monitoring devices according to the respective mounting instructions.
Monitoring devices with analogue display
Monitoring devices with analogue display are connected in series to the surge arrester
between the base plate and the ground connection.
XAttach the cable connector of the monitoring devices to the base plate tap of the surge
arrester.
XSelect a cable or conductor for the connector cable with the same diameter and material
as used for the earth connection.
XConnect the earth connection to the earth tap of the monitoring devices.
Digital monitoring devices
Installation of digital monitoring devices is described in their respective operating
instructions.
12 | Operating instructions | EN | 1HC0141361 AA

5.5 Earthing
XObserve national regulations and the requirements of the system owner.
XConnect surge arresters to the system ground via the shortest path. Carefully clean
contact surfaces before mounting and lubricate them with acid-free contact grease.
XEnsure selection of suitable material pairs.
XObserve recommended cross-sections:
Surge arrester type Recommended cross-section
for copper [mm²]
Recommended cross-section
for aluminum [mm²]
MWK/MWD,
POLIM-C..N, -C..ND, -C..LB
POLIM-R
35 70
POLIM-D 70 95
POLIM-C..HD
POLIM-H..ND, -H..SD
POLIM-I
POLIM-X
POLIM 4.5 ID
70 120
POLIM-K
POLIM-S 95 150
POLIM-H..N 120 240
Surge arrester with disconnecting device
XEnsure that a surge arrester equipped with a disconnecting device meets the following
requirements:
The disconnector must be connected to earth with a flexible connection.
One side of the earth wire must be connected to the disconnecting device, the other
side must be connected to the earth near the mounting position of the insulating
bracket.
In case of disconnection, ensure that the disconnected earth wire can swing freely and
that no flash over will occur between the bottom connection and earth (see chapter
5.4.6).
6 Maintenance
The surge arresters do not contain wearing parts and are therefore maintenance-free.
Replacement parts are not needed.
We recommend to check the surge arresters visually on a regular basis for damages and the
clamps of surge arrester terminals for loose connections.
6.1 Safety
DANGER!
System uses high-voltage
Electric shock may cause death, serious injury and damage to the system.
XAllow only authorised professionals to perform work on the surge arrester.
XObserve the safety rules of EN 50110-1 or equivalent local standards on the “Operation of
Electrical Installations” before working on the system:
àDisconnect the system from the power supply.
àSecure the system against being switched on again.
àEnsure that the system is de-energised.
àGround the system and short-circuit it.
àCover or cordon off neighbouring energised parts.
1HC0141361 AA | EN | Operating instructions | 13

6.2 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).
CAUTION!
Solvents and abrasive equipment
Damage to the silicone housing
XDo not use cleaning agents containing solvents other than isopropanol.
XDo not use abrasive equipment for cleaning.
XDo not use silicone grease or silicone oil after cleaning.
XDo not immerse the entire surge arrester into a cleaning bath.
XClean the surge arresters either with:
àWarm water and soft, lint-free cloths,
àWater spray with a maximum pressure of 400 kPa,
àSoft, lint-free cloths moistened with isopropanol (isopropyl alcohol).
XClean the entire silicone surface.
6.3 Replacement after overloading or damages caused by animals
Overloading during operation can lead to damaging (e.g. traces of fire, fractures) of the
surge arrester from arcs.
Minimal animal bites on the sheds of the silicone housing (e.g. by birds, martens, mice etc.)
do not impair the functioning of the surge arrester. However, heavy bites do reduce the
insulation capacity of the silicone housing.
CAUTION!
Damage to the surge arrester
Damaged surge arresters no longer protect the equipment.
XCheck the surge arresters visually on a regular basis to ensure that they are in sound
condition.
XReplace damaged surge arresters.
XReplace the surge arresters when the disconnecting device has operated.
XKeep a small quantity of surge arresters in reserve.
6.4 Disconnecting device
The disconnecting device, if installed, does not need any maintenance.
DANGER!
Tripping of disconnecting device
Risk of injury due to inappropriate handling.
XDo not expose the disconnecting device to temperatures above 60 °C (for exceptions, see
specific product documentation).
XNever try to open the disconnecting device.
XDo not connect any voltage/energy source to the terminals of the disconnecting device.
14 | Operating instructions | EN | 1HC0141361 AA

7 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:
Silicone rubber (not halogenated) for the external insulation
Terminals and other parts made of aluminium
Metal-oxide resistors
Fibreglass-reinforced plastic lugs
Steel mounting hardware
Silicone rubber (not halogenated)
The silicone rubber can decompose into SiO2and CO2, thus uncovering the encased metal-
oxide resistors.
Metal-oxide resistors
The metal-oxide resistors are sintered ceramic bodies composed mainly of ZnO (90%). In
accordance with the rules of the European Union for hazardous substances, with reference
to the Regulation (EC) 1272/2008 on classification, labeling and packaging of substances
and mixtures, and the Directive 2008/98/EC on waste, the following other substances are
present in the metal-oxide resistors:
Bi2O3>1% by weight
Sb2O3, Co2O3, NiO, Cr2O3>0.1% by weight
After the sinter production process, these oxides are part of a new composition within
the ZnO-resistor ceramic bulk material, which is chemically bonded. No exposition occurs.
In addition, the metal-oxide resistors are coated with a thin glass layer (<0.1% by weight)
containing PbO.
A leaching test, according to the Council Decision of 19 December 2002 and directive
1999/31/EC on acceptance of waste at landfills, has therefore been performed. The test is
much more arduous than reality since the test is performed with material in ground form.
Despite this, all substances listed in the Council Decision of 19 December 2002, except Pb,
fulfilled the criteria for inert non-hazardous waste. It is very likely that a test performed on
metal-oxide resistor blocks, parted but not ground, would fulfil the criteria for inert non-
hazardous waste for all substances.
No danger to personal health or to the environment is present if disposed of properly.
Constituent components of the disconnecting device
Terminals and metallic parts made of aluminium
Enclosure made of thermoset material
Small propellant charge
If the disconnecting device has not been damaged it can be assumed that the small
propellant charge had not been tripped. In this case, the disconnecting device must be
disposed of as hazardous waste according to the local laws and regulations. Do not open
the disconnecting device.
Tripped disconnecting devices can be recycled or disposed of as non-hazardous waste.
1HC0141361 AA | EN | Operating instructions | 15

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Document-ID: 1HC0141361 AA | EN
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