MCB 10kA

An MCB operates as an automatic switch that opens in the event of excessive current flowing through the circuit and once the circuit returns to normal, it can be reclosed without any manual replacement.

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	“B”	“C”
Standard Conformity	IS/IEC 60898-1
No. of Pole	1P, 1P+N, 2P, 3P, 3P+N, 4P*
Magnetic Release Setting	(3-5)In	(5-10)In
Method of Mounting	Clip on Din rail (35×7.5mm)
Rated Operational Voltage	240/415V
Rated Current	6 to 63A*
Rated Frequency	50Hz
Rated Short Circuit Capacity	10kA
Max. Value of I2 t (Joule Integral)	125000
Rated Insulation Voltage	660V
Rated Impulse with stands Voltage	4kV
Material Group	III a
IP Category	IP20
Ambient Temp.	-5º to 55ºC
Tightening Torque	2.Nm
Dielectric Test Voltage	2.5kV
Energy Limiting Class	3
Vibration	3g
Installation Position	Vertical/Horizontal
Bi-connect Terminal	Both side
Line & Load Terminal Capacity	25 mm2
Resistance to Shock	40mm free fall
Endurance Mechanical & Electrical Cycles	8000

*CURRENT RATING

6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A
*1P = Single Pole
*1P+N = Single Pole & Neutral
*2P = Double Pole

*3P = Three Pole
*3P+N = Three Pole & Neutral
*4P = Four Pole

Miniature Circuit Breakers have precisely formed molded case & cover of flame-retardant high strength thermo-plastic material having high melting point, low water absorption, high dielectric strength and temperature with stand. The Switching Mechanism is independent, manual and trip free, i.e, the breaker trips internally even if the operating knob is held in ON position.

The Contact Mechanism comprises of fixed & moving contacts specially designed for reliability, long life and anti-weld properties. The Arc Extinguishing Device comprises of 12 plates arc chute. The arc under the influence of the magnetic field and arc guide is moved into the arc chute where it is rapidly split and quenched. The tripping mechanism is thermal magnetic type.

THERMAL OPERATION

The thermal operation provides protection from moderate overload. During a current overload, a thermo-metallic element (bimetallic strip) deflects until it operates a latching mechanism allow the main contacts to open.

MAGNETIC OPERATION

In a magnetic operation, large overloads or short circuit current actuates a solenoid causing a plunger to strike the latching mechanism rapidly opening the main contacts.

Type B Characteristics curves