Feeder Protection Relay

Listing ID #5460919

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Supply Type Manufacturer, Exporter, Supplier
Preferred Buyer Location All over the world

Features Suitable for 1A / 5A relay rating Choice of 6 IDMT curve and definite time History of 6 latest faults along with settings Self supervision facility Breaker status monitoring In-built....

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Product Details

Features

Suitable for 1A / 5A relay rating
Choice of 6 IDMT curve and definite time
History of 6 latest faults along with settings
Self supervision facility
Breaker status monitoring
In-built breaker trip circuit supervision
Disturbance records (DR) in IEEE COMTRADE
format – Optional
Event Records (ER) – Optional
Programmable digital inputs and outputs
MODBUS open protocol over RS – 485 port
MODBUS protocol over RS – 232 port
Draw out facility with inbuilt CT shorting

Principle of Operation:

JNC 268 N / JNC 268 A / JNC 268 L :

The relay measures the line current from each of the line CTs and if the current exceeds the set threshold, then relay extends a trip signal after an operating time. The relay's “operating time” is determined by selecting “definite time” or one of the six “inverse time” characteristics.

A sensitive earth fault or restricted earth fault (suitable for high impedence REF scheme) is provided in the relay.The input to sensitive earth fault protection can be connected in two ways. First one the residual current derived from three phase current transformers, and second is low output core balance current transformer can be connected. The input to restricted earth fault protection will be derived from neutral CT output with external stabilizing resistor.The relay has facility to monitor circuit breaker operation through 52a or 52b aux contacts of circuit breaker.

4 programmable digital inputs (PDI) and 4 programmable digital outputs are provided and can be used to synthesize logic along with some internal digital inputs i.e.(phase OC pickup, Earth fault pickup, Phase high set trip, Earth fault OC trip, Earth fault high set trip,etc). Together, this feature can be effectively used to reduce the number of aux. tripping relays in a protection scheme. The trip relay (B1-B2) can be operated either when any one / more of the protection scheme provided inside JNC 268 x initiates the relay or any/more of the PDI initiates the same relay.

Each PDO has independent timer. Each PDI has programmable mask facility.The relay in-built breaker trip circuit supervision and dedicated alarm contact to indicate trip circuit failure.

JNC 268 A :

Provides Multi shot auto re-closer facilitates automation of breaker operation. Auto re-closer can be programmed to provide a maximum of five shots. “Dead time” starts when a trip signal is provided due to the occurrence of a fault involving L-L or L-G or L-L-G or L-L-L or L-L-L-G. After an elapse of a time interval equal to “dead time”, closing command will be extended.

The “reclaim time” timer starts at the instant when the “dead time” timer expires. If after extending the “breaker close” signal an over current fault was detected before the “reclaim time” timer reached its terminal count, then the relay understands that the fault in the system is still persisting and the over current relay will issue a trip signal. The relay tries to close the breaker for a maximum of the programmed number of shots before it choses to lockout. The relay can be configured for independent trip sequence as IDMT or Def. time

JNC 268 L :

The relay monitors line current even after the trip condition to ensure breaker operation. Even if small current exist in the line the relay sends trip command to adjacent or backup breaker after definite operating time. The current threshold and definite time required to detect breaker failure are programmable.

Company Details

Reliable, Safe & Proven products that are Engineered to perfection is what JVS Electronics offers. Having been in the Electrical Protection Industry for over two decades, JVS has developed and manufactured products that have realized customer delight over the years.
With a strong and loyal customer base to boast about, JVS has designed and manufactured products that have been adding great value to businesses.
Started in the year 1991 in a small way, when acceptability of Small scale manufacturers to make high end products like relays was a challenge across the globe, JVS established itself by proving its excellence and commitment to inventing and producing products of great quality. JVS has since come a long way and is one of the leading relay manufacturers, supplying products in India and abroad.
A highly energetic team of professionals, with a strong sense of customer focus has been working to take JVS to greater heights. The management of JVS is backed by highly skilled and intelligent employees, that makes any new challenge a cake walk.
Conceptualizing new designs, developing new products, making products more customer friendly and adding value to customer's businesses is the daily mantra at JVS Owning many design and product patents, JVS has scaled heights thanks to virtues of patience and perseverance.
A keen look at JVS will exhibit the culture of passion in doing new things, learning, Openness, confidence and humility. Any corporate or individual getting associated with JVS, not only completes a transaction but builds a relationship for a life time. JVS feels it utmost important to nurture the customer's need of reliable, user friendly, problem free products.
We make sure that each product we manufacture are of the highest quality and we go about achieving the same at competitive prices. With the best delivery times in the Industry, JVS Electronics is the safest choice today. We strive to improve Ourselves in every aspect and hence for the valued customers who are already aware of JVS Quality, delivery and Service, there is more that you can expect. Team JVS assays to make each association, every transaction or even a conversation a memorable one.