CQB7R-125 10kA Miniature Circuit Breaker Reclosing
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CQB7R-125 Reclosing MCB is used to combine with Prepaid Meter, when the electricity user prepaid is used up, the MCB will break automatically when getting a signal from the Prepaid Meter. It can be switched on automatically when the Prepaid Meter get a signal that user have bought the electricity.
1 Application
CQB7R-125 Reclosing MCB is used to combine with Prepaid Meter, when the electricity user prepaid is used up, the MCB will break automatically when getting a signal from the Prepaid Meter. It can be switched on automatically when the Prepaid Meter get a signal that user have bought the electricity.
2 Type designation
3 Technical data
| Specifications | |
| Rated voltage | 230V~(1P+N，2P)、400V~（3P，3P+N，4P） |
| Rated impulse withstand voltage Uimp | 6000V |
| Rated current(A) | 40、50、63、80、100、125 |
| Rated frequency | 50Hz / 60Hz |
| Number of poles | 1P+N、2P、3P、3P+N、4P |
| Rated breaking capacity lcn(A) | 6kA, 10kA(High breaking type) |
| Short-circuit capacity Ics(A) | 6kA, 7 .5kA(High breaking type) |
| Mechanical life(cycles) | ≥10000 |
| Electrical life(cycles) | ≥6000 |
| Overvoltage category | Ⅲ |
| Torque | 2.5N·M |
| Automatic closing time | t ≤ 3s |
| Automatic switch-off time | t≤ 2s |
| Signal Connection Wire Length | 300mm (Customizable on demand） |
| Tripping characteristics | See Table 1 |
| Pollution degree | 2 |
| Standard | IEC60898-1、GB10963.1 |
| Compliant certification | CCC |
Table 1 Tripping characteristics（Reference temperature 30℃）
| Item | Curves | Test current ln(A) | Status | Time limit for tripping or non-tripping | Expected result | Remarks |
| a | B、C、D | 1.13ln | Cold | t≤1h（In≤63A） t≤2h（In＞63A） | Non-tripping | Current smoothly rises to specified value within 5s |
| b | B、C、D | 1.45ln | Following item a test | t＜1h（In≤63A） t＜2h（In＞63A） | Tripping | |
| c | B、C、D | 2.55ln | Cold | 1s＜t＜60s(ln≤32A) 1s＜t＜120s(ln＞32A) | Tripping | |
| d | B C D | 3ln 5ln 10ln | Cold | t≤0.1s | Non-tripping | Switch on the power supply by closing the auxiliary switch |
| e | B C D | 5ln 10ln 20ln | 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.
4 Nominal operation conditions
4.1 : Ambient temp. range:-5℃~+40 ℃，average temperature in 24 hours not exceed +35℃
4.2 : Altitude:≤ 2000m;
4.3 : At mounting site, relative humidity not exceed 50% at the max temperature of +40 ℃，higher relative humidity is allowable under lower temperature, for example ,RH could be 90% at +20 ℃
4.4 : Mounting type : Din rail embedded(TH35-7.5)
4.5 Installation conditions
Any direction of the outer magnetic field of the installation site should not exceed 5 times than earth's magnetic field; residual current operated circuit breaker should be mounted vertically, all places inclination no more than 5 °,power position above the handle , the installation place should be no significant impact and vibration.
4.6 Installation should be free from obvious shock and vibration.
5 Conductor requirements and cross-sectional area
| Nominal cross-sectional area (mm2) | Rated current In(A) |
| 10 | 32＜In≤50 |
| 16 | 50＜In≤63 |
| 25 | 63＜In≤80 |
| 35 | 80＜In≤100 |
| 50 | 100＜In≤125 |
6 Dimensions （unit :mm）
7 Tripping curve
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