SRM3-125S /160S Thermomagnetic Fixed Type Molded Case Circuit Breaker

Thermomagnetic type MCCB (thermal magnetic molded case circuit breaker) is the core equipment with overload protection and short circuit protection functions in low-voltage distribution system. Its functional design is based on dual mechanism of thermal tripping and magnetic tripping, which can accurately respond to electrical faults and quickly cut off the circuit to ensure safe and stable operation of the system.

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Model:
SRM3-125S
Brand:
ZJSLAC

Product Description

Model		SRM3-125/160
Standard		IEC 60947-2/GBT 14048.2
Frame grade rated curent Inm(A)		160
Poles		3,4
Rated frequency(f)		50Hz
Rated current In(A)		SRM3- 125:In=10, 16,20,25,32, 40,50,63,80, 100, 125A
		SRM3- 160:In=10, 16,20,25,32, 40,50,63,80.100, 125, 140, 160A
Rated operational voltage Ue(V)		AC400V/415V/500V/660V/690V
Rated insulation voltage Ui(V)		1140
Rated impulse withstand voltage Uimp(kV)		8
Breaking capacity code		S	H	R
Rated ultimate short- circuit breaking capacity lcu(kA)	AC380V/400V/415V	36	50	75
	AC500V	25	25	25
	AC660V/690V	15	15	20
Rated operating short- circuit breaking capacity Ics(kA)	AC380V/400V/415V	25	36	50
	AC500V	20	20	20
	AC660V/690V	10	10	15
Selective category		A
Life of operation cycles	Mechanical	20000
	Electrical (415/440V)	8000

Tripping unit

Thermomagnetic type (fixed type)

Mode of protection	Overload protection, overcurrent protection,N-pole protection(4 pole)
N-pole protection(4P)	A: N pole no protection and always connected without being opened or closed together with the other three poles
	B: N pole no protection and opens and closes together with the other three poles
	C: N pole is protected and opens and closes together with the other three poles
	D: N pole is protected and always connected without being opened or closed together with the other three poles
Operation mode	Manual operation, electric operation, mechanical operation with an external handle
Installation	front connection,rear connection,plug-in connection
Accessory	Auxiliary contacts,alarm contacts,shunt trip unit,undervoltage trip,manual operating mechanism,electric operating mechanism

Outline and installation dimensions(mm)

Model

Ouline dimensions

Installation dimensions

φd

SRM3-125/160

122

155

47.5

43.5

136

68.5

83.5

102

75.5

132

4.5

·Miniaturized design:The product is miniaturized in size,which can meet customers'personalzed requirements for the instllation dimensions of the product.

·Uniform dimensions:Under the same shell frame grade,the installattion dimensions of products with different breaking capabiities(S.H,R)and different functions(thermomagnetic fixed type,thermomagneic adjustable type,electronic type)are exactly the same.