1、 Scope of application

DZ15LE residual current circuit breakerIt is a neutral to ground leakage protection device suitable for circuits with AC 50Hz, rated voltage 380V, and rated current up to 63A (100A). It is used for leakage protection and can also be used to prevent fire hazards caused by grounding fault currents due to equipment insulation damage. And it can be used to protect the circuit and motor from overload and short circuit, and can also be used for infrequent switching of the circuit and infrequent starting of the motor. The rated leakage action value of the residual current circuit breaker can be adjusted by switching according to actual usage requirements.
The DZ15LE residual current circuit breaker complies with the GB14048.2 standard.

2、 DZ15LE leakage circuit breaker model and specifications

Note: Type A N-pole does not have overcurrent release components installed, and the N-pole is always connected and does not open or close together with other three poles;
B-type N-pole does not have overcurrent release components installed, and the N-pole is opened and closed together with other three poles.
Protection type: Overcurrent release for distribution protection; An overcurrent release is used for motor protection.

3、 Normal working conditions and installation conditions of DZ15LE residual current circuit breaker

The altitude of the installation location shall not exceed 2000 meters.
◆ Surrounding air temperature
The upper limit of ambient air temperature shall not exceed+40 ℃;
The average 24-hour ambient air temperature should not exceed+35 ℃;
The lower limit of ambient air temperature shall not be lower than -5 ℃.
◆ Atmospheric conditions
The relative temperature of the atmosphere should not exceed 50% when the highest temperature around is+40 ℃, and there can be higher relative humidity at lower temperatures. When the average lowest temperature in the wettest month is+25 ℃, the monthly average maximum relative humidity is 90%, taking into account the condensation that occurs on the surface of the product due to temperature changes.
◆ Installation conditions
◇ Installed in a location free from impact, vibration, and rain, with the upper terminal connected to the power side and the lower terminal connected to the load side, with a tilt angle of no more than 5 ° from the vertical plane.
The installation category is Class III.
The pollution level is level 3.
The external magnetic field near the installation site of the residual current circuit breaker shall not exceed 5 times the geomagnetic field in any direction.

4、 Main technical parameters and performance of DZ15 residual current circuit breaker

★ Basic specifications and parameters of residual current circuit breakers

model	rated voltage Un(V)	Shell level Rated current (A)	number of poles	Rated current (A)	Rated limit short Road analysis ability Icu（kA）	Rated operation short Road analysis ability Ics（kA）	Rated residual connection Switching ability IΔm（kA）	Rated residual action current I△n(mA)	Rated residual not action current I△no(mA)	Arcing distance
DZ15LE-40	220	40	2	6， 10，16， 20，25， 32，40	3	1.5	1.0	15	8	≤50
								30	15
								50	25
	380		3					75	40
								100	50
			4					200	100
								300	150
DZ15LE-100	220	100	2	10，16， 20，25， 32，40， 50，63， 80，100	5	2.5	1.5	30	15	≤70
								50	25
								75	40
	380		3					100	50
								200	100
			4					300	150
								500	250

The residual current breaking capacity of general residual current circuit breakers is shown in the table

Residual current	I△n	2I△n	5I△n *a	10I△n*b
Maximum interruption time (s)	0.3	0.15	0.04	0.04
a. For residual current circuit breakers with I △ n ≤ 0.03, 5I △ n can be replaced with 0.25A.
b. When using 0.25A according to Note A, then 10I △ n is 0.5A.

The residual current breaking time of general residual current circuit breakers is shown in the table

Delay time (s)	Maximum at I △ n Breaking time (S)	2I△n		Maximum at 5I △ n Breaking time (S)
		Maximum non driving time (S)	Maximum interruption time (S)
0.1	0.3	0.08	0.27	0.14
0.2	0.4	0.18	0.37	0.24
0.3	0.5	0.28	0.47	0.34
0.4	0.6	0.38	0.57	0.44
0.5	0.7	0.48	0.67	0.54
1	1.2	0.98	1.17	1.04

The number of operating cycles and experimental parameters of the residual current circuit breaker comply with the provisions of Table 5

Protection type	On load operating conditions			Shell level Rated current (A)	Number of operation cycles			Hourly operation Number of cycles
	put through	breaking	cosφ		On load	no-load	Total number of times
Used for motor protection	Un 6In	0.17Un 6In	0.35	40, 100	1500	8500	10000	120 times
For distribution lines	Un In	Un In	0.8	40, 100	1500	8500	10000	120 times

The overcurrent limit value in the main circuit that does not cause misoperation
The overcurrent limit value that does not cause misoperation of a residual current circuit breaker in multiphase circuits with unbalanced loads and balanced loads is 6In.
★ Protection characteristics of overcurrent release
The protection characteristics of the overcurrent release of the residual current circuit breaker for distribution protection are shown in the table

ambient air temperature	Test current/rated current	Test time		Initial state
		In>63A	In≤63A
	1.05	Not tripped within 2 hours	Not tripped within 1 hour	Cold state begins
+30±2℃	1.30	Release within 2 hours	Release within 1 hour	Hot state begins

The protection performance of the overcurrent release of the residual current circuit breaker for motor protection is shown in the table

ambient air temperature	Test current/rated current	Test time	Initial state
+20±2℃	1.05	Not tripped within 2 hours	Cold state begins
	1.20	Release within 2 hours	Hot state begins
-5±2℃	1.05	Not tripped within 2 hours	Cold state begins
	1.30	Release within 2 hours	Hot state begins
+40±2℃	1.00	Not tripped within 2 hours	Cold state begins
	1.20	Release within 2 hours	Hot state begins

★ Instantaneous overcurrent release current setting value
The instantaneous overcurrent release current setting value for distribution circuit breakers is 10In, and the instantaneous overcurrent release current setting value for motor protection circuit breakers is 12In, with an accuracy of ± 20%.

5、 Structure and Working Principle of DZ15LE Circuit Breaker

DZ15LE residual current circuit breakerThe electronic residual current circuit breaker is mainly composed of zero sequence current transformers, electronically controlled residual current release devices, and circuit breakers with overload and short-circuit protection. All components are housed in a plastic casing.
When there is leakage or personal electric shock in the protected circuit, as long as the leakage current reaches the operating current value, the secondary winding of the zero sequence transformer outputs a signal and the circuit breaker is activated through the leakage release, thereby cutting off the power supply and providing protection against leakage and electric shock.
When overload or short circuit occurs in the protected circuit, the hydraulic release completes delayed or instantaneous release action, causing the residual current circuit breaker to operate. Thus cutting off the power supply provides overload or short circuit protection.

6、 Appearance and installation dimensions

model	number of poles	External dimensions				Installation size
		A	B	C	D	a	b	Mounting Hole
DZ15L-40	3	78	194	88	73.5	25	180	4-5
	4	103	194	88	73.5	50	180	4-5
DZ15L-63	3	96	227	95	80	30	210	4-7
	4	126	227	95	80	60	210	4-7
DZ15LE-100	3	96	227	95	80	30	210	4-7
	4	126	227	95	80	60	210	4-7

7、 Ordering Notice

When placing an order, please indicate the following points:
Product model and name: such asDZ15LEMCCB
Instantaneous tripping rated current: such as 315A.
The accessory name, specification, and combination code of the circuit breaker should indicate the voltage value of the working voltage (or control power supply voltage) when using undervoltage release and shunt release;
Polar number: 3P
Order quantity: such as 380 pieces.
Example of ordering:DZ15L-400/3300，4P，AC380V，250A， 3500 pieces.