Circuit breaker

DZ47 Miniature circuit breaker

1. Altitude: no more than 2000m;
2. Ambient temperature: -5°C~+40°C, the average value of 24h does not exceed 35°C. If it exceeds this range, please consult with the manufacturer;
3. Relative humidity: no more than 50% when the maximum temperature is +40℃, and the maximum relative humidity is 90% (20℃). Special measures must be taken for condensation on the product due to temperature changes;
4. Pollution level: Level 2;

Detailed introduction

Main purpose and scope of application
DZ47 series miniature circuit breaker (hereinafter referred to as circuit breaker) is a current-limiting high-breaking miniature circuit breaker with dual protection of overload and short circuit. It is suitable for AC 50Hz/60Hz and rated working voltage 230V/400V. Used for circuit overload and short circuit protection in circuits with a rated current of 63A and below.
This product complies with: National Standard GB10963 and IEC60898-1.

Model and meaning

Working conditions
1. Altitude: no more than 2000m;
2. Ambient temperature: -5°C~+40°C, the average value of 24h does not exceed 35°C. If it exceeds this range, please consult with the manufacturer;
3. Relative humidity: no more than 50% when the maximum temperature is +40℃, and the maximum relative humidity is 90% (20℃). Special measures must be taken for condensation on the product due to temperature changes;
4. Pollution level: Level 2;
5. Installation category: Class II and Class III;
6. The external magnetic field of the installation site should not exceed the geomagnetic field in any direction 5 times that of,
7. Generally, it is installed vertically, with a tolerance of 2° in any direction;
8. There should be no significant impact and vibration at the installation place.

Structural features
DZ47 series miniature circuit breakers are composed of plastic shell, operating mechanism, contact arc extinguishing system, tripping mechanism, etc. The shell is made of high-flame-retardant, high-strength special plastic, which has strong impact resistance and light weight. The parts of the operating mechanism of the circuit breaker are made of high-strength plastic products, which obtain the lowest moment of inertia while ensuring sensitivity and reliability, so that the time from the start of the short-circuit fault to the action of the tripping mechanism is very short. The tripping mechanism is composed of two parts: a bimetallic overload inverse time tripping mechanism and a short-circuit instantaneous electromagnetic mechanism.

Main technical parameters
Basic parameters

Type of release	Rated current A	Number of poles	Voltage V	Breaking capacity A	Reference temperature
Type B	1, 3, 6, 10, 16 , 20 , 25 , 32 , 40	1	230/400	6000	30℃+5℃
		2, 3, 4	400
	50, 63	1	230/400	4500
		2, 3, 4	400
Type C	1, 3, 6, 10, 16 , 20 , 25 , 32 , 40	, 1	230/400	6000
		2, 3, 4	400
	50, 63	1	230/400	4500
		2, 3, 4	400
Type D	1, 3, 6, 10, 16 , 20 , 25 , 32 , 40 , 50 , 63	1	230/400	4500
		2, 3, 4	400

Overcurrent protection characteristics of circuit breakers

Serial number	Model specification	Starting state	Test current A	Test time	expected outcome	Remarks
1	All values	Cold state	1.13ln	t≥1h	No tripping	-
2	All values	Followed by 1 trial	1.45ln	t<1h	Trip	The current rises to the specified value within 5s
3	ln≤32	Cold state		1s<t<60s	Trip	-
3	ln>32	Cold state	2.55ln	1s<t<120s	Trip	-
4	Type B	Cold state	3ln	t≥0.1s	No tripping	Close the auxiliary switch to turn on the power
	Type C		5ln
	Type D		10ln
5	Type B	Cold state	5ln	t<0.1s	Trip	Close the auxiliary switch to turn on the power
	Type C		10ln
	Type D		14ln

Over-electromagnetic tripping characteristic curve of circuit breaker

Shape and installation dimensions

Ordering instructions
Must be pointed out when ordering;
1. Model and specification of the
miniature circuit breaker;2. Rated current and number of poles of the miniature circuit breaker;
3. Quantity.
Example: Order DZ47-63 three-pole circuit breaker, type C, rated current 20A, and the number of 1000 units should be written as: Order DZ47-63/3P C20, 1000 units.

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