The vacuum interrupter and the circuit breaker operating mechanism have performed the number of operations indicated in the following table. All spares should be stored in such a manner as to protect against corrosion, humidity, adverse atmospheric conditions mechanical damage and vermin. When ordering spares of replacements a complete description should be given, together with relevant nameplate, data and serial numbers.
For further details regarding spares the Spares Manual can be referred. The following spares should be kept in stock, actual quantities will depend on the number of circuit breaker in service and operating conditions.
Prove dead after opening. The Gap when New is 5mm, which, when the interrupter is Worn Out, will reduce to 3 mm. PUT2 Nos. M12 Brass Washer and 1 No.
Eccentric Drive over the Motor Shaft As shown in the drawing such that their keyways are matching. Place the key through the keyway thus locking the eccentric drive with the motor shaft. Fit the two charging pawls with DU bushes through gradual, application of pressure on a bench vice. Insert the pawls into the motor shaft such that the stepped positions are in opposite direction and the plane faces fall upon one another. File M12 shim washers to have slots for the key and place these above the second eccentric drive.
Key the end bearing to the shaft. The top end of the Aluminium Bracket and the top of the end bearing meshes. Fit the Aluminium Bracket after proper adjustment to the motor shaft housing by M4X30 long round head screws and M4 spring washers at the four ends.
Tighten the screws with a screw driver. Check tightening of the motor bracket to the gear box housing by double nuts and loctite. Press the Plunger so that the other end of the Spindle comes out through the Pole Piece.
Lock the Spindle with 1 No. The Screw Head should be downward. Fit the Buffer pin in the M5 thread hold of the Trip Box through the 7. Disconnet coil and remove coil assembly 2 bolts from rear Using long nosed pliers remove the spring clip. Remove plunger, coil can now be removed from the coil box. To refit the coil, reverse the sequence and check electrical operation. Replacing Spring Release Coil.
Reverse Sequence to Refit Coil. Check Electrical Operation. Replacing Shunt Trip Coil. All trade names or trademarks mentioned herein whether registered or not, are the property of their owners. Our policy is one of continuous development. Accordingly the design of our products may change at any time. Whilst every effort is made to produce up to date literature, this brochure should only be regarded as a guide and is intended for information purposes only.
Its contents do not constitute an offer for sale or advise on the application of any product referred to in it. We cannot be held responsible for any reliance on any decisions taken on its contents without specific advice. Open navigation menu. Close suggestions Search Search. User Settings. Skip carousel. Carousel Previous. Carousel Next. What is Scribd? Explore Ebooks. Bestsellers Editors' Picks All Ebooks.
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Download now. Save Save HWX manual. Original Title: HWX manual. Related titles. Carousel Previous Carousel Next. Jump to Page. Search inside document. The circuit breaker closing mechanism is capable of storing a considerable amount of energy and therefore, before commencing work, steps must be taken to discharge this energy and leave the springs in a discharged state SPRINGS FREE.
Reversal of the above isolates and withdraws the circuit breaker primary terminals make with contacts in the housing primary connection spouts. Care must be taken to ensure that no undue stresses are placed on any part of the equipment, especially that the projecting base If the equipment is not required for immediate use it should be stored in a clean, dry, well ventilated place and covered.
Remove lifting plate before mounting panel. HD screws with washer 1. The main cables shall be made off in acordance with the cabling schedule. Busbar Assembly and Torque Settings. High Voltage Test 3. Electrically : Turn the 4. Trip the circuit breaker Section 4. Insert the racking handle into the racking orifice below the mechanism facia, locating the slot in the handle on the drive pin the racking shaft.
Mechanism Facia 4. Earth the circuit with the help of circuit earthing truck. Isolate all transformers during test 5. Refer to figure 7 and ascertain the mechanism spring state. The only readjustment which may be required in case of trip and spring Care must be taken to ensure that no lubricant is applied to the operating mechanism electrical release coil plunger or electrical trip coil plunger.
Unscrew the 4 Nos. M4 slotted head screw from the Motor Gear Box Unit. Fit 1 No. Insert the other eccentric drive into the motor shaft and key it. The top end of the Aluminium Bracket and the top of the end bearing meshes Keep the assembly in the bin free on the motor shaft.
Check that the pawls are absolutely. COLs F. Check the Locking Check easy movement of Spindle Operation Description Put the Neoprene Buffer on Buffer Pin Check easy pivoting of Trip Bar on Trip Box.
Kannan Gnanaprakasam. Anonymous nwByj9L. Akula Veerraju. Claudious Jepit Geraman Gema. Osama Kamel Elghitany. Slobodan Nesovic. Ahmed Saeed Ghonemy. Inayat Hathiari. David Arbildo. S Manohar. More From ramana Raghu Ram. Malu Sakthi. Anonymous sENwj8nwq. Senthil Thanappan. Anil Marturi. You must be familiar with these interlocks before operating the circuit-breaker Electrical interlocks have been designed according to the circuit diagram. All trade names or trademarks mentioned herein, whether registered or not, are the property of their owners.
For Schneider medium voltage switchgear and for panel builders. As standard, the circuit-breaker is equipped with two auxiliary switches with 8 contact elements each. It remains in this initial position until the ON command is issued again.
An experienced circuit for many applications. Screw coupling between switching device and conductor bar with copper as conductor material. Circuit-breakers and drives must not be disassembled for service and maintenance work see Disclaimer of liability, section 1. Depending on dirt collected, hfx cloth as often as necessary.
Spring-charging mechanism of the drive using a crank Approx. The control lines are wired in the circuit-breaker up to the control connector or up to the terminal strip. Keep duration of exposure as short as possible. Connect external control lines via the terminal strip. Release the energy-storing device by performing the corresponding operating sequence on the circuit-breaker.
Bolts and socket-head cap screws except slotted screws and nuts except selflocking nuts Table 2: The energy storing device of motorized circuit-breakers is charged automatically once the auxiliary voltage is applied. The drive mechanism is available in two basic models, i. Measures to take in case of condensation: Whilst every effort is made to produce up-to-date literature, this brochure should only be regarded as a guide and is intended for information purposes only.
On principle, general cleanliness of the circuit-breaker or of its external parts should be ensured. The energy storing device can be charged immediately after switching ON by hand or by motor.
Note : The mechanism springs can be recharged after a closing FIG. Resetting Motor Mechanism after Loss of supply operation enabling an. The mechanism is supplied with the carried out. Truck However, restoration of the motor 6. Refer to Figure 6. Aseol molitea or The maintenance policy for HWX Further advice can be obtained Molydag 47 is to be used for the re- switchgear is based on IS from the manufacturer.
Operating Mechanism 6. Manual closing and opening tight at the terminals and the operations should be made to change over of contacts are These intervals may vary greatly check the closing and tripping checked periodically with a depending on the duty the mechanisms. The electrical closing continuity meter. The time intervals are therefore best determined by user The duty imposed on spring charge All insulators should be cleaned experience based on the behaviour motor is very light, consequently with a non-sheeding cloth.
However, the assembly 6. The scoring, the brushes for excessive Contacts only readjustment which may be wear and free movement in the required in case of trip and spring brush retainers. Check the condition of the plug and. Any furnished An overhaul will be necessary Spring Release Coil — Refer to surfaces should be cleaned using a when : Figure for fitting instructions Trip branded liquid silver polish and a a.
An examination has identified a Coil — Refer to Figure 13 for Fitting non-shedding cloth. LT Fuses 6. The limit of contact wear of a Auxiliary Switch vacuum interrupter has been Limit Switch Ensure that all connections are tight reached. Refer to fig. Contact surfaces should be treated in a similar c. The vacuum interrupter and the All spares should be stored in such manner to the primary contacts.
Clean and examine all parts of the 7. If The following spares should be kept description should be given, required parts should be sparingly in stock, actual quantities will together with relevant nameplate, lubricated with a good quality depend on the number of circuit data and serial numbers.
For further mineral oil. Manual can be referred. Refer to Section 3. Overhaul comprises work carried out to restore the equipment to a satisfactory condition including the replacement of components. Contact Wear Gauging. Unscrew the 4 Nos. M4 slotted head screw from the Motor Gear Box Unit.
Fit 1 No. M12 Brass Washer and 1 No. Eccentric Alignment of keyaways should be Drive over the Motor Shaft As shown in the drawing checked. Place the key through the keyway thus locking the eccentric drive with the motor shaft. Fit the two charging pawls with DU bushes through gradual, application of pressure on a bench vice.
Insert the pawls into the motor shaft such that the stepped positions are in opposite direction and the plane faces fall upon one another. Insert the other eccentric drive into the motor shaft and key it. File M12 shim washers to have slots for the key and place these above the second eccentric drive. Key the end bearing to the shaft.
The top end of the Aluminium Bracket and the top of the end bearing meshes. Fit the Aluminium Bracket after proper adjustment Check tightening of the motor to the motor shaft housing by M4X30 long round bracket to the gear box housing by head screws and M4 spring washers at the four double nuts and loctite.
Tighten the screws with a screw driver. Keep the assembly in the bin free on the motor shaft. Check that the pawls are absolutely. Lock the Spindle with 1 No. Fit the Buffer pin in the M5 thread hold of the Trip Box through the 7. Put the Neoprene Buffer on Buffer Pin Our policy is one of continuous development. Accordingly the design of our products may change at any time.
Whilst every effort is made to produce up to date literature, this brochure should only be regarded as a guide and is intended for information 99 Plunger inside the Coil. Its contents do not constitute an offer for sale or advise on the application of any product referred to in it. We cannot be held responsible for any reliance on any decisions taken on its contents without specific advice.
Remove Facia Screws Disconnect. All trade names or trademarks mentioned herein whether registered or not, are the property of their owners. Using long nosed pliers remove the spring clip. Check Electrical Operation. Remove plunger, coil can now be removed from FIG. Replacing Shunt Trip Coil the coil box. To refit the coil, reverse the sequence and check electrical operation.
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