描述
Application
ADB3-125 series miniature circuit breakers (hereinafter referred to as circuit breakers) are mainly used in AC 50Hz, rated working voltage up to 400V, rated current 63A to 125A in power distribution lines for overload and short circuit protection, and also for infrequent on/off operation and conversion of lines.
The performance of this product conforms to GB/T14048.2 and IEC60947-2 standards.
Types and meanings
1.Company code
2.Miniature Circuit Breaker
3.Design serial number
4.Frame class rated current
5.Breaking capacity level code: high breaking for H type, general type without code
Main parameters and technical performance
3.1 Main types
3.1.1 Type C is mainly used for line protection;
3.1.2 Type D is mainly used for motor protection;
3.2 The rated currents of circuit breakers are 63A, 80A, 100A and 125A;
3.3 The number of poles of the circuit breaker is divided into: single-pole, two-pole, three-pole and four-pole;
3.4 The circuit breaker is for embedded installation (can be installed on the mounting rail);
3.5 The rated working voltage of the circuit breaker and its associated rated current short-circuit breaking capacity (see Table 1).
Table 1
| Rated current (A) | Number of poles (P) | Rated voltage(V) | Rated limit short circuit breaking capacity Icu(kA) | Rated operating short circuit breaking capacity Ics(kA) | Test line power factor (COSΦ) |
| 63, 80 100, 125 |
1 | 230 | 6(H type 10) | 6(H type 7.5) | 0.65~0.7 |
| 2, 3, 4 | 400 | 6(H type 10) | 6(H type 7.5) | 0.65~0.7 |
3.6 Overcurrent release characteristics (see Table 2)
Table 2
| No. | Rated current In | Initial state | Test current | Rated time | Expected results | |
| a | In≤63A | Cold state | 1.05In | t≤1h | Non-trip | |
| In>63A | t≤2h | |||||
| b | In≤63A | Immediately after the previous test | 1.3In | t<1h | Trip | |
| In>63A | t<2h | |||||
| c | All values | Cold state | C | 8In | t<0.1s | Non-trip |
| D | 10In | |||||
| d | All values | Cold state | C | 12In | t<0.1s | Trip |
| D | 14In | |||||
Mechanical life
The circuit breaker turns on and breaks the rated current at the specified rated voltage with a power factor of 0.65 to 0.7 and a mechanical and electrical life of 15,000 cycles.
Thermal/electromagnetic release characteristics
Value of release characteristics (see Figure 1)
Figure 1
ADB3-125 Outline and installation dimensions
ADB3-125 Outline and installation dimensions (see figure 2)
Figure 2
Instructions for use
6.1 Before installing the circuit breaker, it must be confirmed that:
a.The circuit breaker is in good condition and the handle is flexible in operation.
b.The installation site is free from harmful gases, splashing water and rain, and serious dust.
The temperature should be no higher than 40℃ and no lower than -5℃.
The altitude should not exceed 2000m.
6.2 The handle should be below the installation so that the upward movement of the handle is for closing and the downward movement is for breaking.
6.3 Depending on the situation, dust, condensation and dirt should be cleaned from the circuit breaker and the screws tightened in time. Note that… The cleaning operation should be carried out in the event of a power failure.
6.4 The release characteristics of the circuit breaker have been set in the production of the enterprise and cannot be adjusted by the user.
6.5 The base temperature of the protection characteristics of this series of circuit breakers is 30℃.
If more than one circuit breaker is installed into the sealed box at the same time, the temperature inside the box will rise accordingly and the current value will be 0.8 In.
6.6 Inlet and outlet copper conductor cross-sectional area selection (see Table 3)
Table 3
| Rated current A | 63 | 80 | 100 | 125 |
| Cross-sectional area of conductors mm² | 16 | 25 | 35 | 50 |
Ordering Instructions
For use in ordering, should specify the type, specification and quantity of the circuit
breaker, for example: ADB3-125, C type 80A, 3P circuit breaker 40 units.
Product Information
