Scribd
Upload
123 views3 pages

1.2.3 CRP Panels

The Control and Relay Panel (CRP) is essential for protecting substation equipment and managing electricity flow, featuring various protection types such as generator, line, transformer, and bus bar protection. These panels are designed according to voltage classes and include numerous components like relays, meters, and control switches, adhering to international standards and IEC-61850 protocols. Additionally, two main types of control panels, simplex and duplex, are manufactured, with the former housing all instruments in one panel and the latter separating relay and control units.

Uploaded by

promhotrainig1
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
123 views3 pages

1.2.3 CRP Panels

The Control and Relay Panel (CRP) is essential for protecting substation equipment and managing electricity flow, featuring various protection types such as generator, line, transformer, and bus bar protection. These panels are designed according to voltage classes and include numerous components like relays, meters, and control switches, adhering to international standards and IEC-61850 protocols. Additionally, two main types of control panels, simplex and duplex, are manufactured, with the former housing all instruments in one panel and the latter separating relay and control units.

Uploaded by

promhotrainig1
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 3

1.2.

3 CRP PANEL:

Control and Relay panel is most important equipment of the substation as it work as shield guard for all
substation equipments and electrical network. Moreover, these panels are useful to control the flow of
electricity as per the Voltage class and detect the faults in transmission lines. Designing and manufacturing
of Control and Relay panel depend on the requirement of utilities and these can broadly be classified as
follows;
a) Generator Protection
b) Line Protection
c) Transformer Protection
d) Bus Bar Protection
e) Bus Coupler Protection
In this panel, varieties of numerical & electromechanical relays are installed to provide damage protection to
equipments. Meters, Semaphore indicators, Control Switches, Indicating lamps, Push Buttons, Annunciator,
Test Blocks and Test Plugs are among of major equipments installed as per designing requirements.
The Control & relay panels are designed & manufactured as per voltage class of substations like 11KV,
33KV, 66KV, 132KV, 220KV and 400KV etc. However DC voltage or supply voltage may differ according to
the panel requirement such as 30V DC, 110V DC, 220V DC etc. Use of Control & relay panel is not only
limited in Substations owned and operated by electrical utilities, but also essential in industrial and
commercial sector where power consumption is very high.
Modern Control & Relay panels are widely being manufactured as per international standards and strictly
following IEC -61850 communication protocol, which is well compatible to SCADA application
There are major two types of control panels are being manufactured for substations;
1. Simplex type 2. Duplex type
In simplex type panel, all control and relay instruments are equipped / mounted in the same panel. On the
other hand, control & relay unit fitted separately in duplex type, wherein relay installed in relay section and
other equipments like Meters, Switches, Semaphores, Annunciator, indicating lamps and Push Buttons in
control section.Panel is made of CRCA sheet having thickness from 2mm to 3mm. Rack mounting
type panel is design with front glass door and corridor type is simple panel which do not have front glass
door.

Page 3 of 1
Figure 2.9 Control & relay panel
3. ELEMENTS OF ELECTRICAL PANEL:
3.1) ACB:
This type of circuit breakers, is those kind of circuit breaker which operates in air at atmospheric pressure.
After development of oil circuit breaker, the medium voltage air circuit breaker (ACB) is replaced completely
by oil circuit breaker in different countries. But in countries like France and Italy, ACBs are still preferable
choice up to voltage 15 KV. It is also good choice to avoid the risk of oil fire, in case of oil circuit breaker. In
America ACBs were exclusively used for the system up to 15 KV until the development of new vacuum and
SF6 circuit breakers. Fig 2.10 Shows both Fixed and draw out type ACB.
Types of ACB :
There are mainly two types of ACB are available.
a) Plain air circuit breaker.
b) Air blast Circuit Breaker.
Plain air circuit breaker:
Plain brake air circuit breakers are the simplest form of air breakers. The main points of contacts are made
in the shape of two horns. The arc of these circuit breakers extends from one tip to the other.
Air blast Circuit Breaker:
Magnetic blowout air circuit breakers are used in voltage capacity up to 11KV. The extension of the arc can

Page 3 of 1
1.2.2 get by magnetic field provided by the current in blowout coils

Page 3 of 1

You might also like