HIGH FREQUENCY CAPACITOR

(1). SAFETY NOTICE

The objective of these instructions is to help make capacitor users aware of application and handling practices which will aid them in the use of power capacitors. The guides cover good practices in receiving, handling, installing, field-testing and disposal of power capacitor unit. The guides do not addross themselves to the requirements of insurance underwriters, which may be applicable to any given capacitor application. Compliance with codes and insurance underwrit ers’ requirements demand individual consideration on the part of capacitor users for each particular situation and should not be assumed to have been achieved simply by complying with the suggestions contained in these instructions.

(A). PROTECTION AGAINST SHOCK

CAUTION: – POWER MUST BE SWITCHED OFF BEFORE DOING ANY WORK ON CAPACITORS OR EQUIPMENTS TO BE CERTAIN THAT THE CAPACITORS HAVE BEEN DISCONNECTED FROM THE POWER SOURCE. IT IS NECESSARY TO MAKE A VISUAL CHECK FOR AN OPEN CONTACT DISCONNECT. BEFORE USE & AFTER TAKING OUT, SHORT THE CAPACITOR WITH INSULATED SHORTING STICKS TO DISCHARGE ANY RESIDUAL CHARGE.

(B). EXPLOSION HAZARD

The correct application of capacitor disconnecting system will greatly minimize the possibility case rupture. but since considerable stored energy may be available upon the occurrence of fault inside a capacitor.

It is possible to get explosive case rupture in any application even wit proper. disconnecting system.

Test procedur || Start Up

(C). HANDUNG OF FAILED CAPACITORS

Some failed capacitors may be found considerably bulged due to internal pressure from gassir prior to circuit clearing. Such units should be handied very carefully. A failed capacitor should be shorted with suitable insulated shorting sticks, to discharge any residual charge. It is furth recommended that a bulged capacitor be permitted to cool before handling. This will lower t internal pressure, reducing the possibility of case rupture with leakage of gasses during subs quent handling.

WARNING: – AVOID LIQUID CONTACT WITH SKIN AND EYES AND EXPOSURE TO FUMES IN AN UNVENTILATED AREA.

(D). COMBUSTIBEL IMPREGNANT FIRE HAZARD

These capacitors contain a class II B combustible liquid which could possibly ignite it there is a case puncture or rupture in the presence of an electric arc. Capacitors should be suitably protected from mechanical damage and located where possible fire would not result in damage or hazard to the surrounding area.

(E). DISPOSAL OF CAPACITORS OR IMPREGNAN

The preferred method of liquid disposal is by incineration. If teasible, the solid portion of the capacitor, the elements, should also be incinerated and the capacitor case should be disposed of in a waste disposal site approved for hazardous industrial waste.

An alternate method of disposal to be considered is the incineration of the liquid and disposal of the solid reminder, consisting of elements, and capacitor case, in a waste disposal site ap- proved for hazardous industrial waste Disposal of whole capacitor, including the liquid, in a site approved for hazardous industrial waste is a third method, which may be considered for the disposal of the capacitors

Do not let impregnating liquid enter Into drain.

(2). Receving

When unpacked CAREFULLY INSPECT THE UNIT FOR DAMAGE AND CHECK THE NAME PLATE TO BE SURE THE DESIRED RATING HAS BEEN RECEIVED. File a claim immedi- ately with the carrier for any damages sustained in transit, and notify nearest office of INDUCTOTHERM (india) Ltd.

(2.A). Handins Do not lift the capacitor by bushing. Dragging the capacitor across the floor or striking the case may cause leaks.

(2.B). Stoting Where the capacitors are exposed to freezing temperature and are not in operation, cooling must be protected from damage due to water treezing solid.

While storing the capacitor water trom the cooling coil is to be removod by blowing the air. Capacitor should be protected from mechanical damage and located possible fire would not result in dama hazard to the surrounding aroa.

(3). Installation Since this product contains a combustible liquid (OSHA class lll- B). the location of the c tors should be chosen with consideration given to the possibility of fire in the event of capao damage and subsequent case rupture.

If a capacitor fails in service, it is important to remove the energy source as quickly as possi As long as the capacitor remains energized, gases are generated as a result of a burning of the dielectric material in the faulted area. These gases can expand the capaci until it ruptures. Once the case in vented, the gases and free dielectric fluid will be released the equipment enclosure.

CAUTION:- TIGHTENING THE TERMINAL NUTS TO MORE THAN 15 FO POUNDS IS NOT REQUIRED OR RECOMMENDED: EXCESIVE TORQUE C BREAK GASKET SEALS OR STRIP THREADS ON GROUND BAR OR BUSHIN TERMINALS

(3). COOLING SYSTEM

The cooling coil is a continuous copper tube terminated. It is generally rediused to red hazard of clogging A minimum flow rate of 0.5 gal/min, must be maintained and the out temperature must not exceed 45° C (1130 F) to prevent erosion ot the tubing the flow ra not exceed 16 lit. min. and be free of abrasive grit.

“Only a few minutes of operation without water will damage the capacit water is discontinued until one unit fails, the other units on the same wat line must be assumed to have been severely abused even though no o damage is seen.”

A screen is sometimes used in the water supply lines to prevent clogging due to depos should be checked and cleaned periodically. These deposits are not only harmful in t reduce the flow of water but also because they reduce the flow of heat from the capacitor the water and gives wrong outlet water readings.

The interconnecting insulating hoses should be of sufficient quality and length such that the case to ground voltage and leakage current will not damage them.

(4). MAINTENANCE

FOR THE SAFETY OF PERSONNEL, THIS APPARATUS SHOULD BE ISOLATED FROM HIGH VOLTAGE CIRCUITS BEFORE PERFORMING MAINTENANCE, INSPECTIONS AND SERVICING. ALL COMPONENTS SHOULD BE ELECTRICALLY DISCONNECTED BY MEANS OF A VISIBLE BREAK, AND SHOULD BE SECURELY GROUNDED.

During initial startup the capacitors should be monitored to find any probliems. Some things to look for are water leaks, wet and/or dirty conditions around insulation systems, proper capacitor cooling water quality, and temperature to all capacitors. sparking of case to mounting frames as well as hot capacitor terminals due to loose terminal nuts and hot spots in materials caused by inductive heating. Frequently scheduled maintenance check should tollow until routine mainte- nance scheduled timing is determined.

Add a Comment

Your email address will not be published. Required fields are marked *