Jyoti Limited

Switch Gears

   Features

Vacuum Circuit Breaker

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Manufactured in technical collaboration with Toshiba Corporation, Japan.
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A compact, light weight construction, optimized to give minimum weight to KA ratio.
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A unique 'U' shaped insulation barrier housing the Vacuum interrupters, (except for VK 10 Q 40) imparting maximum mechanical strength against electrodynamic forces and provides most effective phase to phase and phase to earth segregation.
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A simple motor charged spring operating mechanism noted for its high performance reliability.
bullet A versatile mechanism capable of operating Vacuum Interrupters of any type. Hence, dependence on single source of Vacuum Interrupters eliminated.
bullet Trip free mechanism suitable for repeated auto re closing duty.
bullet Spring charging time of less than 10 seconds.
bullet Totally enclosed construction for spring charging motor.
bullet Built-in manual charging handle with every circuit breaker for effortless manual spring charging.
bullet Easy visual check of contact erosion
bullet Superior mechanical endurance limit. Maintenance required only after 10,000 operations.


Inside the Cubicle

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Fully segregated circuit breaker compartment ensures that no arc product or foreign body can travel from or to cable and bus bar compartment.

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A screw type racking arrangement for easy insertion and withdrawal of the Circuit Breaker renders perfect contact pressure, independent of operator's force.
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A positive interlock to ensure the circuit breaker insertion to or withdrawal from SERVICE position only when it is OPEN.

Retrofit (Indoor MOCB Panel)

  • Jyoti MOCB Panel

  • Other make MOCB Panel

Jyoti Ltd. has successfully carried out 'Retrofitting' of nearly 1000 MOCBs with VCBs in last decade at number of installations. 

 


 


Retrofitting Medium Voltage Old MOCB Switchgear with VCB
Rear view of 
One-to-One VCB
Bus bars
bullet Bus bars and jumpers are covered with special heat shrink sleeves which provide effective insulation between phases or phase to earth, even if bridged by vermin or any other conducting body.
bullet Flexible insulating shrouds cover the bus bar to jumper joints and jumper to stationery contact joints

 













 

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Automatic safety shutters cover the live parts when circuit breaker is not in SERVICE position, for safety to operating personnel.

bullet Independent safety shutters for upper and lower disconnect contacts. Each independently pad lockable in open or closed condition.
bullet Eproxy moulded stationary disconnect contacts provide effective segregation between phases and phase to earth.
A separate segregated compartment for voltage transformers. Voltage transformer connections through eproxy moulded contacts.


bullet Withdraw able voltage transformer truck arrangement.
bullet Automatic safety shutters cover the live parts when voltage transformer is withdrawn outside the crucible.
bullet Adequate space for entry and termination of two sets of 3-core or 6 nos. (2 per phase of single core) cable connections.
bullet Additional sets of cables or current transformers can be housed within modular rear extension.

Vacuum Contactor - (Indoor)

Medium Voltage Vacuum contactor

Rear view Vacuum contactor

  • Suitable for 3.3kv / 6.6kV  400 Amp.

  • A compact , light weight construction, optimized to give minimum weight.

  • Excellent Choice for switching motors transformers and Capacitors.

  • Available In two versions  Electrical and Mechanicals.

  • Exceptionally High mechanical and electrical life( In million operations)

  • Low Chopping Current ( maximum 1.5 Amp and Avg 0.9 Amp)

  • Suitable for High Switching frequency ( around 300 operations per hour)

  • Cheaper / cost saving device for motor , transformer and capacitor switching.

  • Low maintenance.

Ring Main Unit

Rear view Main Unit

Ring Main Unit
(JRM Series)

Copyright © 2004 Jyoti Ltd.