Operating instructions Surge arrester Type MWK, MWD
Contents
1. Damaged surge arresters Material damage and personal injury due to the installation and commissioning of damaged surge arresters Do not use damaged surge arresters gt Examine shipment immediately to check for damage gt 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 gt Store surge arresters in a well ventilated clean room gt Remove plastic film to prevent the formation of condensation water Doc 1HC0040013 AA EN 9 Operating instructions for MWK MWD surge arrester FPAULDID 5 COMMISSIONING 5 1 Safety DANGER 5 2 System uses high voltage Death serious bodily harm and damage to the switching gear may result from an electric shock gt Allow only authorised professionals to perform work on the surge arrester gt 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 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 EN Doc 1HC0031013 AA AL ED ED2. Thread Maximum torque Nm M6 8 8 M8 21 4 M10 44 M12 74 M14 119 M16 183 3 3 4 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 grea ter than 35 8 EN Doc 1HC0031013 AA AL ED ED FAILED Operating instructions for MWK MWD surge arrester 4 CAUTION WARNING TRANSPORTATION UNPACKING AND STORAGE Transportation Surge arresters not secured during transportation Damage to surge arresters that have fallen during transport gt Secure surge arresters against sliding or falling before transportation gt Observe safety precautions printed on the packaging for proper handling during transportation and storage Unpacking The surge arresters provided are packaged in stable cardboard boxes or wooden crates The accessories packaged in plastic bags are either included in the carton or wooden crate or supplied separately in case of large quantities The surge arresters are supplied with accessories installed unless specifically or dered otherwise The routine test reports for the final electrical inspection are in cluded in the packaging material gt 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
3. Product safety The MWK MWD has been constructed using state of the art technology and offi cially recognised safety related rules Danger to life and health of the user or third parties could arise or damage of the MWK MWD and other property could occur while the MWK MWD is in use however gt The MWK MWD is only to be used when it is in technically 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 MWK MWD 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 MWK MWD using the operat ing instructions Personnel being trained instructed or provided with general education may only work with the MWK MWD under constant supervision by an experienced high voltage technology professional 2 2 3 Organisational measures gt gt v Doc 1HC0040013 AA Observe all safety and danger related information regarding the MWK MWD 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
4. FAILED Operating instructions for MWK MWD surge arrester 5 3 DANGER 5 4 CAUTION Installation location and protective distance Danger of fire and injury via arc with overloading of the surge ar rester Ignition of flammable materials by an arc and flying burning parts gt Do not store flammable materials near the surge arrester gt When working near the surge arrester do not wear easily flammable clothing 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 gt 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 gt In cases of doubt calculate the protective distance according to the formulas in the Application guidelines Mounting 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 gt Before mounting ensure that the characteristic data on the rating plate of the surge arrester matches the requirements of the power system gt Ensure that system voltage applied at the terminals of the arrester does not exceed the maximum permissible continuous operating voltage of the surge arrester The head end is ge
5. authorised Clearly assign areas of responsibility for working with the MWK MWD 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 MWK MWD Check to ensure that work is being performed in a safety conscious way with awareness of possible dangers and while observing the operating instructions EN 5 Operating instructions for MWK MWD surge arrester FPAULDID 3 DESCRIPTION 3 1 Intended use 3 2 The MWK MWD is a surge arrester intended for use in high and medium voltage applications Surge arresters protect the insulation of high voltage and medium voltage devices against overvoltages which are caused by lightning or switching operations The MWD surge arrester is intended for use indoors only The surge arrester MWK is intended for use outdoors and indoors The manufacturer is not liable for resulting damages from further unintended use The operator accepts all responsibility for using the MWK MWD outside of its in tended application range as specified in this document Structure and function The MWK MWD surge arrester is constructed from serially connected non linear metal oxide MO resistors These MO resistors have an extremely non linear re sistance property At the maximum operating voltage of Uc only a small capacitive current will flow in the mA ran
6. 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 hinder the functioning of the surge arrester Heavy bites do re duce the insulation capacity of the silicone housing however 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 gt Replace damaged surge arresters gt Keep a small percentage of installed surge arresters in reserve EN Doc 1HC0031013 AA FPALDID Operating instructions for MWK MWD surge arrester 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 should be cleaned Solvents and abrasive equipment Damage to the silicone housing Do not use cleaning agents containing solvents besides isopropanol oun Do not use abrasive equipment for cleaning Do not use silicone grease or silicone oil after the cleaning gt Clean surge arresters either with warm water and soft lint free cloths water spray with a maximum pressure of 10 bar soft lint free cloths moistened with isopropanol isop
7. on the surge arrester The rating plate molded into the silicone housing contains the following data Data Meaning MWK MWD Type designation IEC P CL kA Rated short circuit current for 0 2 sec f Hz Power system frequencies Hz Additional data is etched in or located on signs Data MWK MWD Meaning Complete type designation with specification of the maximum permissible continuous operating voltage Us Uc kV Maximum permissible continuous operating voltage Us Rated voltage Nominal discharge current IEC L Cl Line discharge class if specified Dat Date of manufacture No HA Serial number Doc 1HC0040013 AA EN 7 Operating instructions for MWK MWD surge arrester 3 3 2 Application guidelines The following guidelines apply for the use of MWK MWD surge arresters e Application guidelines for medium voltage systems pamphlet CHHOS AR 3257 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 Maximum Minimum Maximum torque screw in depth screw in depth Nm mm mm M12 Head end 48 18 23 5 M12 Foot end 48 18 23 5 The specified values in the following table apply for steel bolts amp nuts of strength class 8 8 which are used in some clamping accessories
8. Operating instructions Publication No 1HC0040013 AA Surge arrester Type MWK MWD With ABB metal oxide resistors and silicone housing Without gaps For indoor and outdoor use Mounting and installation maintenance transportation storage and disposal Issued by ABB Switzerland Ltd High Voltage Products Surge Arresters Jurastrasse 45 CH 5430 Wettingen 1 We reserve the right to make changes Contact information 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 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 MWK MWD surge arrester FPAULDID Table of contents 1 ABOUT THIS DOCUMENT 3 1 1 Validity 3 1 2 Target group 3 1 3 Copyright 3 2 SAFETY 4 2 1 Symbols and advices 4 2 2 Basic safety precautions 5 2 2 1 Product safety 5 2 2 2 Personnel related measures 5 2 2 3 Organisational measures 5 3 DESCRIPTION 6 3 1 Intended use 6 3 2 Structure and function 6 3 3 Technical data 7 3 3 1 Technical data on the 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 Ele
9. ar gins gt Observe national regulations and the rules of the system owner EN Doc 1HC0031013 AA FAULDID Operating instructions for MWK MWD surge arrester 5 4 4 Earthed installation If no surge counters and or milliammeters were supplied the MWK MWD surge arrester is to be mounted earthed gt Bolt surge arresters directly to the earthed frame or foundation Depending on the type of mounting plate centring washers are used gt Connect the ground connection of the surge arrester to its base plate tab 5 4 5 Insulated installation If surge counters and or milliammeters were supplied the MWK MWD surge ar rester is to be mounted insulated gt Mount surge arresters with the included loose insulators made of cast resin on the earthed frame or foundation according to the dimensional drawing gt Mount surge counters milliammeters according to the respective mounting in structions Surge counters milliammeters with analogue display Surge counters Milliammeters with analogue display are connected in series to the surge arrester between the floor plate and the ground connection gt Attach the cable connector of the surge counter milliammeter to the base plate tab of the surge arrester gt Select a cable or conductor for the connector cable with the same diameter and material as used for earth connection gt Connect the earth connection to the earth tab of the surge counter milliammeter Digital surge counters milliammeters D
10. ctrical check before commissioning 10 5 3 Installation location and protective distance 11 5 4 Mounting 11 5 4 1 Transportation during mounting 12 5 4 2 Installation position 12 5 4 3 Minimum distances between surge arresters and earth 12 5 4 4 Earthed installation 13 5 4 5 Insulated installation 13 5 5 Earthing 13 6 MAINTENANCE UPKEEP 14 7 DISPOSAL 16 EN Doc 1HC0031013 AA FPAULDID Operating instructions for MWK MWD surge arrester 1 ABOUT THIS DOCUMENT These operating instructions are part of the MWK MWD surge arrester and de scribe 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 MWK MWD surge arrester 1 2 Target group The target group of these operating instructions is professionals in the field of high voltage technology The MWK MWD may only be commissioned and maintained by persons in structed 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 liabl
11. e for compensation All rights including those regarding the translation are reserved Doc 1HC0040013 AA EN 3 Operating instructions for MWK MWD surge arrester FPAULDID 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 da mage 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 Meanin word g 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 The type and source of danger appear here Possible consequences which could occur if the measures are not followed appear here WARNING _Impermissible actions appear here WORD gt Measures for avoiding the danger appear here EN Doc 1HC0031013 AA AL ED ED FPALDED Operating instructions for MWK MWD surge arrester 2 2 Basic safety precautions 2 2 1
12. ge With an increase in voltage 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 MO resistors and connection equipment is held together with strong strips made of fiberglass reinforced plastic The directly molded silicone housing with sheds protects it from all environmental and weather influences This design has proven to be the best solution in every environment for years For indoor ap plications without pollution sheds are not required Thanks to its high energy absorbing capability and low protective level the MWK MWD is especially suited for overvoltage protection of e Transformers e cables motors e other high and medium voltage apparatuses and systems EN Doc 1HC0031013 AA FAULDID Operating instructions for MWK MWD surge arrester 3 3 Technical data The technical data dimensions weights and installation distances are specified in the following documents e surge arrester MWK for applications in a c systems in the CHHOS AR3205 6 pamphlet e surge arrester MWD for applications in a c systems in the CHHOS AR3209 pamphlet e MWK MWD dimensional drawings 3 3 1 Technical data
13. igital surge counters milliammeters need separate current sensors which con nected to the base plate tap of the surge arrester by means of a long bolt gt Connect the earth connection at the bolt of the sensor according to the mount ing instruction of the surge counter milliammeter 5 5 Earthing gt Observe national regulations and the requirements of the system owner gt Connect surge arresters to the system ground via the shortest path Carefully clean contact surfaces before mounting and lubricate with acid free contact grease gt Observe recommended minimum diameters Copper dia 20 mm Aluminum dia 40 mm Doc 1HC0040013 AA EN 13 Operating instructions for MWK MWD surge arrester FPAULDID 6 DANGER CAUTION MAINTENANCE UPKEEP System uses high voltage Death serious bodily harm and damage to the switching gear may result from an electric shock gt Allow only authorised professionals to perform work on the surge arrester gt 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 The surge arresters do not contain wearing parts and are therefore maintenance free Replacement parts are not needed Replacement after overloading or damages caused
14. nerally intended for connexion 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 Doc 1HC0040013 AA EN 11 Operating instructions for MWK MWD surge arrester FPAULDID 5 4 1 5 4 2 CAUTION 5 4 3 The following materials made of stainless or galvanised steel are to be provided by the customer e bolts e foundation bolts e nuts e bolt locks e any required balancing washers gt Carefully clean contact surfaces before mounting and lubricate with acid free contact grease gt Ensure selection of suitable material pairs Transportation during mounting Depending on weight and installation location of the surge arrester a crane may be necessary for mounting The crane rope can be fastened directly or by means of an eyenut to the surge arrester head end Installation position Deposits on the undersides of sheds Conductivity of deposits hinders protective function of the MWK MWD gt Always mount surge arresters in such a way that the sheds point downward TE Minimum distances between surge arresters and earth The minimum permissible distances between the surge arresters and the earth are specified on the data sheets supplied with the offer or order confirmation The val ues are based on calculations for unfavourable conditions and include safety m
15. o 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 EN Doc 1HC0031013 AA
16. ropyl alcohol Apply on the whole silicone surface Doc 1HC0040013 AA EN 15 Operating instructions for MWK MWD surge arrester FPAULDID 7 DISPOSAL MWK MWD surge arresters are environmentally friendly products which must be disposed of based on the respective applicable regional regulations in an environ mentally friendly manner The materials should be given up for recycling Constituent components are e silicone rubber not halogenated for the external insulation e mounting sections and other parts made of aluminium e metal oxide varistors e _ fibreglass reinforced plastic lugs e steel mounting hardware Silicone rubber not halogenated The silicone rubber can break down into SiO and COs 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 e percent by weight over 1 BizO3 and Sb2Os3 which are considered to be dan gerous substances according to EU ordinances e 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 lt 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 N
Download Pdf Manuals
Related Search