NBSe MB Series 2P Miniature Circuit Breaker,CB Certified
MCB Selection
1.The first characteristic is the overload which is intended to
prevent the accidental overloading of the cable in a no fault
situation. The speed of the MCB tripping will vary with the degree
of the overload. This is usually achieved by the use of a thermal
device in the MCB.
2. The second characteristic is the magnetic fault protection,
which is intended to operate when the fault reaches a predetermined
level and to trip the MCB within one tenth of a second. The level
of this magnetic trip gives the MCB its type characteristic as
follows:
·
| Type | Tripping Current | Operating Time |
| Type B | 3 To 5 time full load current | 0.04 To 13 Sec |
| Type C | 5 To 10 times full load current | 0.04 To 5 Sec |
| Type D | 10 To 20 times full load current | 0.04 To 3 Sec |
The third characteristic is the short circuit protection, which is
intended to protect against heavy faults maybe in thousands of amps
caused by short circuit faults.
The capability of the MCB to operate under these conditions gives
its short circuit rating in Kilo amps (KA). In general for consumer
units a 6KA fault level is adequate whereas for industrial boards
10KA fault capabilities or above may be required.
1. Application
The miniature circuit breaker mcb is mainly used in AC50/60Hz
single pole220V or two,three,four pole 400V voltage for overload
and short-circuit protection as well as for unfrequent on-and-off
switching electric equipment and lighting circuit under nrmal
condition.
The miniature circuit breaker mcb is suitable for industry,
business, building, ressidence, etc.
The miniature circuit breaker mcb is conformity with
GB10963,IEC60898 standards.
2. Main technical data
| Rated temperature 40C |
| Rated voltage 230V/400V AC |
| Rated current: 6,10,15,16,20,25,32,40,50,60,63A
(D):1,3,5,6,10,15,16,20,25,32,40A,50A,63A |
| Electric endurance not lower than 6000 times |
| Mechanical endurance lower than 10000 times |
| Tropical test:2 kinds |
| Weight(g) | 1P | 2P | 3P | 4P |
| 100 | 202 | 304 | 406 |
| Standard | Rated current (A) | Pole | Voltage (V) | Breaking capacity(A) |
| EN898 IEC898 | 1 to 40 | 1 | 240 | 6000 |
| 2,3,4 | 415 | 6000 |
| IEC157-1 | 1 to 40 | 1 | 220/240 | 6000 |
| 2,3,4 | 220/240 | 6000 |
| 2,3,4 | 380/415 | 6000 |
3. Product show
Material: unti-fire Nylon PA66, Copper and silver point.
5. Our Services
(1) Warranty ( 24 months warranty )
1. The warranty starts from the delivery date from our factory;
2. During the warranty, any defective product will get repaired or
replaced for free ;
3. It is beyond the warranty as the products breaked by the
violence , the carelessness or repaired , altered without
authorization.
(2) Lead Time
1. Sample orders will be delivered from our factory within 7
working days.
2. General orders will be delivered from our factory within 7-15
working days.
3. Bulk orders will be delivered from our factory within 25 working
days at most
(3) Shippment
1. By EMS, DHL, FedEx, TNT, UPS or other express.
2. By our forwarding agent (by air or by sea).
3. By your own forwarding agent.
4. By domestic forwarding agents to any city in China
