CAB2 series MCB has much longer service life thanks to energy-storage operating mechanism;Enclosure and functional parts made from imported plastics with flflame-retardant, heat-resistant, and impulse-proof properties;Higher current-limiting capacity ensuring a cost-effective range of products.
| ELectrical Features | Rated current In | 1,2,3,4,5,6,8,10,13,16,20,25,32,40,50,63A |
| Poles | 1P, 1P+N, 2P, 3P, 3P+N,4P | |
| Rated voltage Ue | 240/415V~ | |
| Insulation voltage Ui | 500V | |
| Rated frequency | 50/60Hz | |
| Rated breaking capacity | 6,000A | |
| Energy limiting class | 3 | |
| Rated impulse withstand voltage(1.5/50) Uimp | 4,000V | |
| Dielectric test voltage at ind. Freq. for 1 min | 2kV | |
| Pollution degree | 2 | |
| Thermo-magnetic release characteristic | B,C,D | |
| Mechanical Features | Electrical life | 8,000 Cycles |
| Mechanical life | 20,000 Cycles | |
| Contact position indicator | Yes | |
| Protection degree | IP20 | |
| Reference temperature for setting of thermal element | 30℃ | |
| Ambient temperature (with daily average≤35℃) | -5℃~+40℃ | |
| Storage temperature | -25℃~+70℃ | |
| Installation | Terminal connection type | Cable/Pin-type busbar/U-type busbar |
| Terminal size top/bottom for cable | 25mm2 18-3AWG | |
| Terminal size top/bottom for busbar | 25mm2 18-3AWG | |
| Tightening torque | 2.5Nm 22In-Ibs | |
| Mounting | On DIN rail EN60715(35mm) by means of fast clip device | |
| Connection | Power supply in both directions | |
| Combination with accessories | Auxiliary contact | Yes |
| Alarm contact | Yes | |
| Shunt release | Yes | |
| Over/Under voltage release | Yes |
MCB Characteristics Curves
|
Thermal Tripping |
Magnetic Tripping |
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|
Asper IEC60898 |
No tripping current |
Tripping current I2 |
Time Limits t |
Hold current I4 |
Trip current I5 |
Time Limits t |
|
B Curve |
1.13×IN |
≥1h |
3×IN |
≥0.1s |
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|
1.45×IN |
＜1h |
5×IN |
＜0.1s |
|||
|
C Curve |
1.13×IN | ≥1h | 5×IN | ≥0.1s | ||
| 1.45×IN | ＜1h |
10×IN |
＜0.1s | |||
|
D Curve |
1.13×IN |
≥1h |
10×IN |
≥0.1s |
||
| 1.45×IN |
＜1h |
20×IN |
＜0.1s |
|||
Tripping characteristics
Based on the Tripping Characteristics, MCB are available in“ B”“, C”and“ D”curve to suit different types of applications.
“B”Curve for protection of electrical circuits with equipment that does not cause surge current (lighting and distribution circuits) Short circuit release is set to (3-5)In.
“C”Curve for protection of electrical circuits with equipment that cause surge current (inductive loads and motor circuits) Short circuit release is set to (5-10)In.
“D”Curve for protection of electrical circuits with cause high inrush current ,typically 12-15 times the thermal rated current (transformes, x-ray machines etc,)Short circuit release is set to (10-20)In.
Circuit Diagram
Overall and Installation Dimension(mm)
