L7 Mini Circuit Breaker MCB
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT or LC
- Min Order Qty:
- 100 Pieces pc
- Supply Capability:
- 10000 Pieces per Month pc/month
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Applications:
L7 has protective function of overload, and is used in lighting distribution system in industry, commerce, dwelling and protect fractional electric motors. They also have many merits of high protective grade (up to IP20), high breaking capacity, reliable sensitive action, convenient multi-pole assembling and long life. They are mainly adapted to the circuit of AC 50Hz, 230V in single-pole, 400V in double/three/four-pole for protecting overload and short circuit. Meanwhile, they are also used in turning on or off the electric apparatus and lighting circuit under the normal conditions.
Features:
1) Conforms to standards of electrical EN60898 (IEC898), GB10963-99
2) Rated current: 230V/400V, 50/60Hz
3) Rated breaking capacity: 10kA IEC898 (0.5 - 63A), 15kA IEC947-2 (0.5 - 63A)
4) Short circuit breaking capacity of DC: max. 48V (KL7, 10kA) single-pole, max. 250V (KL7-DC, 6kA) single-pole
5) Performance: C, D characteristic curve
6) Max. fuse that can be connected to: 100AgL (>10kA)
7) Selective grade: 3
8) Working ambient temperature: -5 - 40°C
9) Enclosed protective class: P40 (under mounting)
10) Life:
a) Electrical: not less of 8,000 times switching operation
b) Mechanical: not less of 20,000 times switching operation
Main technical parameters
| Type | L7 |
| Number of poles | 1P 2P 3P 4P |
| Rated Current(In) | 1-63A |
| Rated Voltage(Un) | AC 230(240)/400(415)V |
| Rated frequency | 50(60)Hz |
| Curve | B C D |
| Short-circuit breaking capacity(Icn) | 10000A |
| Magnetic releases operate | B curve: between 3 and 5 In/C curve: between 5 and 10 In/D curve: between 10 and 14 In |
| Endurance | ≥ 4000 |
| Terminal protection | IP20 |
- Q: The main parameters of the fuse selection
- fuse fuse integral, is the fuse fuse fuse the required energy, also known as the fuse value I2t.
- Q: Why the resistance of the fuse to be large
- If the heat generated by the speed is greater than the speed of heat dissipation, then the heat will be more and more
- Q: How do the use of circuit breakers in the end?
- The role of thermal relay is the motor overload automatically cut off the power supply
- Q: Can the fuse be connected to the zero line?
- then from the zero line to the whole line is the power line ! For maintenance is not very safe! Why does the voltage at home fail to reach 220V
- Q: When using low-voltage fuses, note that
- he correct choice of melt. Fuse and line voltage is the same, the rated current of the melt is less than the rated current of the fuse;
- Q: Why the fuse resistance is large
- If the circuit is properly placed in the fuse, then the fuse will rise in the current to a certain height and heat, when the fuse itself cut off the current, so as to protect the safe operation of the circuit.
- Q: How to read the fuse ring
- so the resistance of the resistance: 220000Ω = 220 KΩ, the error is 5% 1.4.2 colored ring resistance: is a precision resistor, with five color ring to represent the resistance value, method and four-color ring resistance The same
- Q: What is the self-recovery fuse:
- When the circuit occurs short-circuit fault, the short-circuit current to produce high temperature so that the rapid vaporization of sodium, steam sodium showed high resistance,
- Q: When replacing the melt, it is required to
- When replacing the new melt, check that the melt rating matches the device being protected.
- Q: Is the fuse the capacitor
- there is a self-recovery fuse, self-recovery fuse is a specially treated polymer resin (Polymer) and distributed in the inside of the conductive particles (Carbon Black) composition
1. Manufacturer Overview
| Location | Zhejiang,China |
| Year Established | 2010 |
| Annual Output Value | |
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3. Manufacturer Capability
| a) Trade Capacity | |
| Nearest Port | SHGNHAI |
| Export Percentage | |
| No.of Employees in Trade Department | |
| Language Spoken: | ENGLISH,CHINESE |
| b) Factory Information | |
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Send your message to us
L7 Mini Circuit Breaker MCB
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT or LC
- Min Order Qty:
- 100 Pieces pc
- Supply Capability:
- 10000 Pieces per Month pc/month
OKorder Service Pledge
OKorder Financial Service
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