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- product name : DZ15LE-40/290 Molded case circuit-breaker
- product brand : LBAJI
- Place of Origin : CHINA
- E-mail : sales@labji.com
- Online Contact :
Scope of Application
DZ15LE series leakage circuit breaker is suitable for circuit of AC 50Hz, rated working voltage 380V and rated current 1OOA,to make in direct contact protection to the human being,also to prevent fire accident caused by ground fault current due to the damage of insulation of equipment. In addition, it not only can protect the circuit and motor against overload and short circuit, but also can be used to switch the circuit and start the motor infrequently
The products are in conformity with such standards as GB6829,GB14048.2,IEC60755 and IEC60947
Applicable Operation Environment
◆ Altitude ≤2000 meters
◆ Ambient temperature: -5℃~+40℃. The average temperature per day should less than 35 degrees Celsius
◆ The air relative humidity is less than 50% at the highest +40℃ at installation site. Higher RH is allowed at lower temperature. Like the RH can reach to 90% at 25℃. Special measures shall be taken when condensation occurs due to occasional temperature change.
◆ Installation condition
◇ Ensure, there is no distinct shake and impact at the installation site, which should be away from any invasion of rain or snow. Its upper terminal should be connected with mains side, while the lower terminal with load side. Besides, the mounting tilt angle against vertical surface should be less than 5°.
◇ Installation class: Class III
◇ Pollution degree: Class III.
◇ The foreign field value of the mounting location (in all directions) should no more five times than that of geomagnetic field.
Main Parameters and Technical Performance
★Basic specifications and parameters
|
Model |
Rated voltage |
Frame size current |
Poles |
Rated current |
Rated ultimate short-circuit breaking capacity |
Rated short circuit breaking capacity |
Rated switching on and breaking capacity |
Rated residual operating current |
Rated residual non-operating current I△no(mA) |
Flashover distance |
|
DZ15LE-40 |
220 |
40 |
2 |
6， |
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， |
5 |
2.5 |
1.5 |
30 |
15 |
≤70 |
|
50 |
25 | |||||||||
|
75 |
40 | |||||||||
|
380 |
3 |
100 |
50 | |||||||
|
200 |
100 | |||||||||
|
4 |
300 |
150 | ||||||||
|
500 |
250 |
- Residual current breaking capacity of general type RCCB
|
Residual current |
I△n |
2I△n |
5I△n *a |
10I△n*b |
|
Max. breaking time (s) |
0.3 |
0.15 |
0.04 |
0.04 |
|
a. for I△n≤0.03 RCCB，5I△n can be replace with 0.25A. | ||||
|
b. according to a, if 5I△n =0.25A， 10I△n=0.5A. | ||||
- Residual current breaking time of general type RCCB
|
Delay time(s) |
Max. breaking time under I△(S) |
2I△n |
Max. breaking time when 5I△n (S) | |
|
Ultimate non-operating time(S) |
Max. breaking 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 |
- Operating cycles and test parameters
|
Protection type |
On-load operating condition |
Frame size current(A) |
Operating cycles |
Operating cycles per hour | ||||
|
On |
Off |
cosφ |
In-load |
No-load |
Total cycles | |||
|
For motor |
Un 6In |
0.17Un 6In |
0.35 |
40, 100 |
1500 |
8500 |
10000 |
120次 |
|
For power distribution lines |
Un In |
Un In |
0.8 |
40, 100 |
1500 |
8500 |
10000 |
120次 |
★ Ultimate over-current value(shall not lead to false operation in main circuits) ☆ If the circuit breaker is applied in multi-phase circuit, the ultimate value should be 6In.
★ protective characteristics of over-current tripper. ★ protective characteristics of over-current tripper of RCCB for power distribution. See below table.
|
Ambient air temperature |
Test current/rated current |
Test time |
Initial state | |
|
In>63A |
In≤63A | |||
|
1.05 |
No tripping within 2h |
No tripping within 1h |
Cold state | |
|
+30±2℃ |
1.30 |
Tripping within 2h |
Tripping within 1h |
Thermal state |
- Protective characteristics of over-current tripper of RCCM for motor protection. See below table
|
Ambient air temperature |
Test current/rated current |
Test time |
Initial state |
|
+20±2℃ |
1.05 |
No tripping within 2h |
Cold state |
|
1.20 |
Tripping within 2h |
Thermal state | |
|
-5±2℃ |
1.05 |
No tripping within 2h |
Cold state |
|
1.30 |
Tripping within 2h |
Thermal state | |
|
+40±2℃ |
1.00 |
No tripping within 2h |
Cold state |
|
1.20 |
Tripping within 2h |
Thermal state |
★ Instantaneous over-current tripper setting current
☆for power distribution, the current setting value is 10In， for motor protection, the setting value is 12In，the accuracy rating is ±20%。
Structure and Operating Principle
DZ15LE MCCB with leakage protection mainly consists of zero sequence current transformer, electronic leakage tripper and circuit breaker with overload & short circuit protection. All parts are assembled in a plastic enclosure.
When residual current occurs in lines, reaching to its rated tripping value, secondary winding coil of zero sequence current transformer will output a signal, which will drive the leakage tripper operating and cut off the power supply. So it can provide protection against leakage current and electrical shock.
Hydraulic tripper will complete delay or instantaneous tripping operation to cut off power supply and provide protection for lines and electrical equipment against overload and short circuit.