Types of MCCB:-
Technical Features and Parameters.

  1. Types of MCCB (Molded case circuit breaker).

Types of MCCB:

Types of Moulded Case Circuit Breaker(MCCB) and their functions.

A molded case circuit breaker is used for utilization in the distribution system. It is used mostly low tension (LT) panel and feeder panel. It is available as pole types, load types, protection types, and operation types. All types of details given below are mentioned.

1- According to the Power Supply:
1-AC Power Supply
  • Capacity: 16A to 1250A.
  • Voltage: 240 to 690 AC Volt.
2-DC Power Supply
  • Capacity: 16A to 630A.
  • DC Voltage: 24 to 750V DC.
1- Pole Type MCCB:

MCCB is used for three phase system without neutral three pole and with neutral four pole.

1- Single pole MCCB:
  • Capacity: 16A to 250 Amp.
  • Voltage: 240-volt AC.
2- Two pole MCCB:
  • Capacity: 16 Amp to 160 Amp.
  • Voltage: up to 690-volt AC.
3- Three pole MCCB:
  • Capacity: 16 Amp to 160 Amp.
  • Voltage: up to 690-volt AC.
4- Four pole MCCB:
  • Capacity: 16 Amp to 160 Amp.
  • Voltage: up to 690-volt AC.
2- Isolator type MCCB:

Isolator MCCBs is used for without protection device only isolation purpose like as--

  • Motor load
  • Sub distribution
  • Isolator for bus coupler
  • For VFD
  • Soft Starter
3- According to breaking capacity MCCB:

Breaking capacity of MCCB is 15 KA, 20KA, 25KA, 35KA, 40KA, 50 KA, 65KA, 100KA.
details given below mentioned...

Sr.No. Breaking Code Breaking value
1 B 25KA/440 Volt
2 F 36KA/440 Volt
3 N 50KA/440 Volt
4 H 70KA/440 Volt
5 S 100KA/440 Volt
6 L 150KA/440 Volt
7 R 200KA/440 Volt
8 HB1 75KA/690 Volt
9 HB2 100KA/690 Volt
10 K 10KA/1000 Volt
4- According to Operation of MCCB:

MCCB can be operated as three type, one is manual second is rotary and third is motorised.

1- Manual
2- Rotary
3- Motorised
5- According to utilization MCCB:
  1. Power distribution.
  2. Motor and Isolator.
  3. Dc and Capacitor Application.
  4. Protection Releases of MCCB.
  5. Auto source transfer
6- Protection Release type MCCB.:

1- Thermal Magnetic Protection:

2- Micrologic Controller Without Display Protection

3- Micrologic Controller With Display Protection

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