CQB91-40 miniature circuit breaker is suitable for AC 50/60Hz, rated voltage single phase 230V, rated current to 40A line. When the person is electric shocked or the leakage current of the power grid exceeds the specified value, the miniature circuit breaker can quickly cut off the faulty power supply in a very short time to protect the safety of the human body and the electrical equipment. The miniature circuit breaker has overload and short circuit protection functions, which can be used to protect the line from overload and short circuit, and can also be used as an infrequent conversion start of the line under normal conditions.

1   Application

CQB91-40 miniature circuit breaker is suitable for AC 50/60Hz, rated voltage single phase 230V, rated current to 40A line. When the person is electric shocked or the leakage current of the power grid exceeds the specified value, the miniature circuit breaker can quickly cut off the faulty power supply in a very short time to protect the safety of the human body and the electrical equipment. The miniature circuit breaker has overload and short circuit protection functions, which can be used to protect the line from overload and short circuit, and can also be used as an infrequent conversion start of the line under normal conditions.

 The product complies with GB 10963.1 and IEC60898-1 standards.

2  Type designation

3 Order Specifications

When ordering circuit breakers, the following points should be specified:

A) Product models, such as CQB91-40;

B) Poles of circuit breakers, such as1P+N;

C) Types of instantaneous tripping, such as type B/ C ;

D) Rated current of circuit breakers, such as 16A、20A、25A;

E) Order quantity, e.g. 100 sets

Purchase order template  CQB91-40    1P+N  C16  100pcs

 

 

 

4  Technical data

Specifications
Rated voltage(V)	AC230V
Rated current(A)	6A，10A，16A，20A，25A，32A，40A
Pole	1P+N
Rated breaking capacity lcs(A)	B、C：4.5/6kA
Rated residual making& breaking capacity	500A
Tripping Curves	B、C
Mechanical & Electrical life	Mechanical：≥6000；Electrical：≥4000
Connecting wire (mm2)	2mm²：6A~16、2.5mm²：20~25、4mm²：32~40
Pollution degree	2
Protection class	IP20
Overvoltage category	Ⅱ、Ⅲ

 

Table 2  Tripping characteristics （Reference temperature 30℃）

Item	Type	Test current	Status	Time limit for tripping or non-tripping	Expected result	Remarks
a	B、C、	1.13ln	Cold	t≤1h	Non-tripping	Current smoothly rises to specified value within 5s
b	B、C、	1.45ln	Following item a test	t≤1h	Tripping
c	B、C、	2.55ln	Cold	1s＜t＜60s(ln≤32A) 1s＜t＜120s(ln＞32A)	Tripping
d	B C	3ln 5ln	Cold	t≤0.1s	Non-tripping	Switch on the power supply by closing the auxiliary switch
e	B C	5ln 10ln	Cold	t≤0.1s	Tripping	Switch on the power supply by closing the auxiliary switch

Note: The term "cold " means that the test is carried out at a reference calibration temperature without load before the test. 

 

5   Operating conditions.

1. Ambient  temp. range:-5℃~+40 ℃，average temperature in 24 hours not exceed +35℃

2. Altitude:≤ 2000m;

3. Atmospheric conditions：At mounting site, relative humidity not exceed 50% at the max temperature of +40 ℃，in the wettest month, the average monthly minimum temperature does not exceed 25 ° C, and the relative humidity does not exceed 90%.

4. Mounting type :  Din rail embedded

5. Installation conditions
  Any direction of the outer magnetic field of the installation site should not exceed 5 times than earth's magnetic field; miniature circuit breaker should be mounted vertically, power position above the handle   , the installation place should be no significant impact and vibration.

6. Wiring method: tighten the wiring with screws.

 

6 Conductor requirements and cross-sectional area

Nominal cross-sectional area（mm2）	Rated current （A）
1	In≤6
1.5	6＜In≤13
2.5	13＜In≤20
4	20＜In≤25
6	25＜In≤32
10	32＜In≤50

7 Dimensions (unit: mm)

8 Tripping curve

 

Zhejiang Chuangqi Electric Co., Ltd.