Control Panel And Its Components

Control Panel And Its Components

Control Panel

A cabinet containing a collection of electrical components designed to control and protect equipment and devices. Basically the control panel shortlists the given point like power rating of the device, incoming supply, explosion proof category, usage of the device. A control panel is a cabinet that contains electrical components for controlling motors and equipment. In simple terms, a control panel is a combination of electrical devices that use electrical power to control various mechanical functions of industrial equipment or machinery. Control panels control and monitor many mechanical processes. Control panels are used to accommodate equipment for measurement, monitoring, protection, detection, control and process management purposes. The panels are located in the control room as well as in the field known as local control panels for operational convenience. The design of the control panel is based on the type of energy and mobility. Panels are named based on the functional media such as electrical, electronic, air and oil. Such as PLC control panel with PLC installed, related wiring, power supply. Pneumatic Control Panels Pneumatic controllers/indicators which are operated by air are called pneumatic control panels with associated controllers, transducer gauges etc. Hydraulic control panel to associated pressure gauge, oil operated with directional control valves.

Control Panel Components

  • surround
  • Incomer with handle and shaft
  • Switch gear elements
  • MCCB
  • MCB
  • contact person
  • Over load relay
  • Phase sequence relay
  • indicator
  • Push buttons


The enclosure is the main part of the control panel and the main visible part of the control panel. Enclosures in control panels are primarily used to isolate and protect components from the environment and to protect the equipment user from electric shock.

Incomer with handle and shaft

Incomer with handle and shaft is also known as isolator with handle and shaft. And isolator is an off-load device used to control, protect and isolate equipment under current or short circuit conditions. Energize equipment to allow maintenance to eliminate faults. The isolator rating shall be the next largest standard rating to the current rating

Switch gear elements

A switch gear component is a combination of electrical components such as MCCB, MCB, contactor, over load relay, fuse, which are used to control, protect and isolate electrical equipment. A common purpose of switching gear elements is to protect electrical equipment in case of any fault or fault in the system.


Molded case circuit breaker is known as MCCB. A molded case circuit breaker provides protection to connected equipment against both overload and short circuit. Molded Case Circuit Breaker The molded case provides an insulating housing for mounting all circuit breaker components. The position of the handle indicates the state of the contacts whether they are closed, open or tripped. So the faulty circuit can be easily identified.
 MCCBs are built into the arc extinguishing device and trip unit. Since the arc extinguishing device interrupts the current flow, the arc formed is confined and divided and thus extinguished. Trip unit In case of short circuit or prolonged over current, the trip unit trips the operating system with the help of temperature sensitive device and current sensitive electromagnetic device.


A miniature circuit breaker is known as MCB. MCBs are automatically operated electrical switches used to protect electrical circuits from damage caused by excessive current or overload. The basic function of a protective relay is to interrupt the current after detecting a fault. A fuse will blow once and then must be replaced, but the circuit breaker can be reset to resume its normal operation.
MCBs can only be operated up to a rated current of 100A, while MCCBs can be operated up to a rated current of 1000A. The work of the MCB is connected by a bimetallic strip, which heats up and bends if excessive current flows through the MCB. In the event of a short circuit, the electromagnet connected to the MCB strikes the trip lever and the contacts of the MCB open instantaneously. Provides protection to electrical equipment as well as users operating electrical equipment.

contact person

A contactor is a control device, used to pass/switch current to electrical equipment. Electrical equipment can be protected from current damage by the use of over load heaters associated with contactor contacts. If any over current is detected, the contacts of the contactor change from NC to NO, thus protecting the equipment.

Over load relay

It protects the circuit from over load condition with the help of bimetallic strips connected to the trip mechanism. The ratings of overload relays are always expressed in range. Ex: For over load relay LRD08, the current rating ranges from 2.5-4A.

Phase sequence relay

Continuously monitors all phases and detects phase sequence, phase unbalance, phase failure and phase loss in three phase systems. If the phase sequence relay detects any fault in the system, it automatically trips the system and protects the electrical equipment.


Indicator lights show the current status of the device.
is the main indicator
  • Red: R phase, off
  • Yellow: Y phase, trip
  • Blue: B phase
  • Green: On

Push buttons

Push buttons are used to switch electrical appliances on/off.
There are push buttons
Green: Start
Red: Wait
Black: Emergency stop