Function and use
DZ15 series plastic case circuit breaker (hereinafter referred to as circuit breaker) is suitable for circuits with AC 50Hz, rated voltage 380V, and rated current up to 100A. It is used for power distribution and motor overload and short-circuit protection. It is also used for infrequent line switching and infrequent starting of the motor.
Detailed parameters
Parameter table 1
| Parameter classification | Parameter item | Parameter value |
|---|
| 4.1 The technical parameters of the circuit breaker are shown in Table 1 | Model | DZ15-40, DZ15-100 |
| Rated voltage Ue(V) | 380 |
| Rated insulation voltage Ui(V) | 690 |
| Frame grade rated current (A) | 40, 100 |
| Number of poles | 2, 3 |
| Rated current (A) | 32,40, 63,80, 100 |
| Rated ultimate short-circuit breaking capacity (Icu kA) | 3, 5 |
| Rated operating short-circuit breaking capacity (Ics kA) | 3, 2.5 |
| Arc distance (mm) | ≤ 50, ≤ 70 |
Parameter table 2
< /tr>
| Parameter classification | Parameter item | Parameter value |
|---|
| Protection type | On-load operating condition | Connection |
| | Ue 6in |
| | 0.17Ue 6in |
| | 0.35 |
| Number of operating cycles | Loaded |
| | 1500 |
| | No load |
| | 8500 |
| | Total |
| | 1 0000 |
| Number of operating cycles | 120/h |
| For distribution lines | Ue In |
| | Ue In |
| | 0.8 |
| | 1500 |
| | 8500 |
| | 10000 |
| | 120/h |
| 4.3 Protection characteristics of overcurrent release | 4.3.1 Protection characteristics of overcurrent release of circuit breaker for distribution protection (see Table 3) | |
| Ambient air temperature | +30±2℃ |
| Test current / Rated current | 1.05 |
| | 1.30 |
| Test current / Rated current | In>63A |
| | In ≤ 63A |
| Initial state | Cold start |
| | Hot start |
| | 2h Internal tripping |
| | 1h Internal tripping |
| | 2h Internal tripping |
| | 1h Internal tripping |
| 4.3.2 Protection performance of circuit breaker overcurrent release for motor protection (see table 4) | | |
| Ambient air temperature | +20±2℃ |
| Test current / Rated current | 1.0 |
| | 1.2 |
| Test time | 2h No tripping |
| | 2h Internal tripping |
| Initial state | Cold state starting |
| | Hot state starting |
| 4.3.3 Instantaneous overcurrent release current setting value (see table 5) | | |
| Model number | DZ15-40 |
| | DZ15-100 |
| Instantaneous operating current setting value of distribution circuit breaker Ii(A) and tolerance | 10In,±20% |
| Motor protection circuit breaker instantaneous operating current setting value Ii(A) and tolerance | 12In, ±20% |
| Single-pole short-circuit protection current operating setting value Ii(A) | For power distribution: 12In
For motor protection: 14In (s) | <0.2 |
| 4.3.4 Protection characteristic curve of circuit breaker overcurrent release | Characteristic curve for distribution protection | |
Parameter table 3
| Parameter classification | Parameter item | Parameter value |
|---|
| Protection function | Action time | Functional relationship of rated current multiples (see graph) |
| Installation | Rated current multiple range | 1 To 100 I/I_n |
| Performance indicators | Action time range | 0.005 seconds to 10000 seconds |
