4 pole mccb circuit breaker manufacturer 630A

  4 pole mccb circuit breaker manufacturer 630A

Breaking capacity

CNSX dual rotary contact structure and the energy release system to ensure stable and reliable protection, and has excellent current-limitting characteristics. Transparent aluminum cover protects the trip unit from settings, rotary handle, motor operation mechanism can be installed, etc.

Compliance with standards

International standards

♦ IEC947-1: general rules

♦ IEC947-2: circuit breakers

♦ IEC947-4: contactors and motor starters

♦ IEC947-5.1: control circuit devices and switching elements;

automatic control components.

National standards

♦ GB14048.1: general rules

♦ GB14048.2: circuti breakers

Working environment

♦ Altitude belows 2000m;

♦ Circuit breaker may be used between -25°c and +70°c. For temperatures higher than 40°C (65°C for circuit breakers used to protect motor feeders), devices must be derated.

♦ It can withstand the impact from humid air, salt spray, oil mist and mold;

♦ It should be installed in places with no danger of explosion, no conductive dust, and no substance enough to corrode metal or damage the insulation.

♦ In places with no rain and snow erosion;

♦ Pollution degree 3;

♦ Installation category III.

Functions and characteristics

Protection

Overload protection: Thermal protection(lr)

Thermal overload protection based on a bimetal strip providing an inverse time curve l²t, corresponding to a temperature rise limit. Above this limit, the deformation of the strip trips the circuit breaker operating mechanism.

Overload protection has the following characteristics:

• lr that can be adjusted in amps from 0.7 to 1 times the rating of the trip unit(16A to 250A).
• Corresponding to settings from 11 to 250A for the range of trip units.

A non-adjustable time delay.

Short-circuit protection: Magnetic protection(lm) short-circuit protection with a fixed or adjustable pick-up, lm, that initiates instantaneous tripping if exceeded.

• TM-D: fixed pick-up, lm, for 16-160A ratings and adjustable from 5 to 10×ln for 200 and 250A ratings.

Protection

Settings are made using the adjustment dials with fine adjustment possibilities.

Overload protection:Long time protection(lr)

Inverse time protection against overloads with an adjustable current pick-up lr set using a dial and a non-adjustable time delay

tr.

Short-circuit protection: Short-time protection with fixed time delay(lsd)

Protection with an adjustable pick-up lsd. Tripping takes place after a very short delay used to allow discrimination with the downstream device.

Short circuit instantaneous protection:(li)

Instantaneous short-circuit protection with a fixed pick-up.

Yueqing Shendian Electrical Co. LTD was founded in 1992,with 23 years of professional production experience in electrical equipment industry. We are committed to exploration and production of intelligent circuit breakers. Now Shendian Electrical has already become one of the professional circuit breaker manufacturers.

Shendian Electrical always considers the product quality as its life and considers scientific and technological innovation as its soul. At present, Shendian Electrical has more than 10 series of products and more than two hundred types of specifications. All of our products passed ISO9001 quality system, most of them passed CCC and CE certification.

Because of stable development, Shendian Electrical has been highly recognized by customers. “Only do what we do best” is our corporate philosophy. Shendian Electrical will try our best to achieve the goal of “ safety in power grid, free and easy” with our actions.

Q1: What kind of material you use? 

A1: PC,PA 

Q2: Will you accept to customize logo for us?

A2: Sure

Q3: How about your production capacity per month?

A3: 10000pcs

Q4: How long can I expect to get the sample? 

A4: Within one week

Q5: Where is your mainly market?

A5:Middle East and Southeast Asia