L7 Mini Circuit Breaker MCB

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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: What should you pay attention to when using high voltage fuses?: indoor fuse of the porcelain seal is intact, the conductive part of the fixed contact with the fixed base contact is tight;

Q: What is the working principle of the fuse: with its own heat generated by the melt melt,

Q: How do I use a multimeter to detect if the fuse is broken: respectively, which fuse is detected to burn, when the multimeter reaction resistance is good Of the resistance is the loss of the fuse is burned

Q: Quickly disconnect the fuse and cut off the fuse slowly: Reflecting the size of the impact current, more than the insurance rated current, the faster the fuse.

Q: What are the precautions for using the fuse?: fuse rated voltage to adapt to the line voltage level, the rated current fuse is greater than or equal to the melt rated current.

Q: What is the difference between the breaking capacity of the fuse and the fusing capacity: Such as the US standard (UL248-1 & 14) 2 times the rated current overload test, requiring the fuse in 60 seconds fuse

Q: What is a spiral fuse:: which is commonly used in machine electrical control equipment.

Q: Fuse blown current and time: and W = PT which can be seen from the fuse fuse current and time relationship.

Q: The choice of fuse tube can be based on the following process: pulse (impact current, surge current, starting current and current transient value) on the life of the fuse tube

Q: The fuse is to prevent the circuit: The current is too large lead to accidents (for example, the circuit somewhere short circuit or the total power of the circuit caused by excessive current is too large)

We are a professional manufacturer engaged in the research, development, production, sale and service of Low voltage electrical products, such as AC contactors, MCBs, MCCBs and RCCBs. Selling well in all cities and provinces around China, our products are also exported to clients in such countries and regions as the Middle East, Southeast Asia, and so on. We also welcome OEM and ODM orders

1. Manufacturer Overview

Location	Zhejiang,China
Year Established	2010
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Nearest Port	SHGNHAI
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Language Spoken:	ENGLISH,CHINESE
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