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Relay Coordination Study And Analysis

Relay Coordination Study And Analysis

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Type Of Service Provider Company
Analytical Service Frequency As per the requirement
Preferred Audit Location On-Site Testing
Mode Of Service Offline
Usage/Application Industrial
Scope The aim of a coordination study is to determine the characteristics,ratings of devices
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Reliserv Solution

Panvel, Navi Mumbai, Thane, Maharashtra
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Product Specification

Type Of Service Provider Company
Analytical Service Frequency As per the requirement
Preferred Audit Location On-Site Testing
Mode Of Service Offline
Usage/Application Industrial
Scope The aim of a coordination study is to determine the characteristics,ratings of devices

Product Description

RELAY COORDINATION STUDY AND ANALYSIS


Relay Co-ordination Study & Analysis service : In power system studies, the power system protection relay and circuit breakers are the major instruments for large interconnected power system. We need proper protection to isolate the faulted region from healthier network. When two protective apparatus installed in series have certain characteristics, which provide a specified operating sequence, they are said to be coordinated or selective. Relay coordination is an important aspect in the protection system design as coordination schemes must guarantee fast, selective, and reliable relay operation to isolate the power system faulted sections.

HOW IS RELAY COORDINATION STUDY AND ANALYSIS DONE?ONE-LINE DIAGRAM

If the study is on a new system or already existing system, attain or create a one- line diagram of the system or the part of the system concerned. The diagram should show the following data:

  1. Apparent power and voltage ratings as well as the impedance ratings and connections of all transformers.
  2. Normal and emergency switching conditions.
  3. Nameplate ratings and sub-transient reactance of all major motors and generators as well as transient reactance of synchronous motors and generators, plus synchronous reactance of generators.
  4. Conductor sizes, types, and configurations.
  5. Current transformer ratios.
  6. Relay, circuit breaker and fuse ratings, characteristics, and ranges of adjustment.
SHORT CIRCUIT STUDY

Obtain or perform a complete short-circuit study providing momentary and interrupting ratings. It must also contain highest and lowest anticipated fault interrupting duties, as well as inputs from every single short-circuit current source. Gather time-current characteristic curves for each protective device under consideration.

CURRENT SCALE SELECTION

Because the whole aim of the study is to attain time-sequenced tripping of overcurrent protective equipment, the characteristic curve of the device closest to the load is plotted as far to the left of a 4- by 4-cycle graph as possible so that the source side characteristic curves are not packed to the right of the paper. The highest short-circuit current of the system is the right-hand limit of the curves.

CHARACTERISTIC CURVES

Plot on the time-current, Iog-log paper the fixed and continuous points of all electrical devices under consideration. In the process of plotting the time-current characteristic curves, it must be remembered that all currents must be referred to a common voltage, either primary or secondary, before attempting to determine coordination. On a delta-wye system, the current that the primary fuse sees due to a secondary fault depends on the type of fault, as well as the severity of the fault.

SELECTIVE COORDINATION

The time-current characteristic curves of protective devices should not overlap if selective coordination is to be achieved, nor should the primary device of the transformer trip on inrush. The protective equipment should be set to defend motors, cables and system gear from overlay as well as short-circuit states.

 

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Relay Coordination Study And Analysis

About the Company

Year of Establishment2012
Legal Status of FirmPartnership Firm
Nature of BusinessDistributor / Channel Partner
Number of Employees51 to 100 People
Annual TurnoverRs. 10 - 25 Crore
IndiaMART Member SinceNov 2013
GST27AAOFR4891A1ZY
Import Export Code (IEC)03140*****
Exports to United Arab Emirates, Yemen, Myanmar, South Africa, Indonesia

We, Reliserv Solution from 2012 are one of the leading organizations involved in wholesale distributor, trader and service provider a broad spectrum of Numerical Relay. Offered range includes the finest quality Numerical Relay, VCB Breaker Spares, Electrical AMC Services and many more. All these products are designed by using only optimum grade components at vendors end. Offered products are highly demanded across the market for their unmatched quality, high durability, easy to use, high functionality and super performance. To suit the varied needs of our valued clients, these products are used in various fields.

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Seller Contact Details

Piyush Rathi

Office No. 9, Plot No. 53/54, Space Heights
Panvel
Navi Mumbai - 410209, Thane, Maharashtra, India

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