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350A Small Molded Case Circuit Breaker 4 Pole MCCB with Motor Distribution

Good quality AC Contactor for sales
Good quality AC Contactor for sales
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350A Small Molded Case Circuit Breaker 4 Pole MCCB with Motor Distribution

China 350A Small Molded Case Circuit Breaker 4 Pole MCCB with Motor Distribution supplier

Large Image :  350A Small Molded Case Circuit Breaker 4 Pole MCCB with Motor Distribution

Product Details:

Place of Origin: China
Brand Name: KRIPAL
Certification: CE
Model Number: UKM30-400

Payment & Shipping Terms:

Minimum Order Quantity: 100 pcs
Price: negotiable
Packaging Details: Each unit packed in a individual box
Delivery Time: 20 days and depends on ordering quantity
Payment Terms: T/T, L/C
Supply Ability: 30000 pcs per month
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Detailed Product Description
Ampere Range: 250A 300A 350A 400A Poles Available: 4 Pole
Certificate: CE Purpose: For Protection Of Power Distribution
Trip Unit: Thermal Magnetic Trip Current: Fixed

350A Small Molded Case Circuit Breaker 4 Pole MCCB with Motor Distribution
The UKM30 series molded case circuit breaker is high-tech products in 21st century with advanced design, high performance, pleasant apprearance and delicate dimension.

Molded Case Circuit Breakers UKM30 series (hereinafter called as UKM30 MCCB) is a new designed MCCB Developed and manufactured adopting international advanced technology. UKM30 MCCB rated insulating Voltage AC 800V is suitable for using in the circuit of AC 50Hz /60Hz, rated voltage up to 690V, rated Working current up to 2500A to distribute electric power and to protect the line and the equipment from being Damaged due to overload, short current and under-voltage. It can also be used for infrequently switch and Starting of motor and for motor overload, short circuit and under-voltage protections. UKM30 MCCB with the  Advantages of the small volume, high breaking capacity, short over-arcing (some of specification is zero Arcing), strong anti-vibration and so on. 



Type UKM30-100S UKM30-250S UKM30-400S
Rated current In(A) 16,25,32,40,50, 63,75,100 100,125,150,175,200,225,250 250,300,350,400
Number of poles 3 4 3 4 3 4
Rated voltage Ui(V) AC690V AC690V AC690V
Arc distance (mm) ≤50 ≤50 ≤50
Rated ultimate short-circuit breaking capitily Icu/Ics(KA) AC690V 5/3 5/3 10/10
AC400V 50/35 50/35 70/70
AC230V 100/50 100/50 100/100
Operational performance (times) ON 6000 2000 1000
OFF 8500 7000 4000
Dimensions (mm) a 90 120 105 140 140 185
b 155 165 257
c 68 68 103
Weight(kg) 1.1 1.4 1.5 1.9 5.5 7.5
Rated operation frequency  120 120 60



Protection Characteristic
The thermodynamic release of a circuit breaker provides the feature of inverse time-delay, while the magnetic release is the instantaneous operation as shown on table 2(distribution circuit breaker) and table 3 (motor protection circuit breaker).
Table 2

Rated current ofrelease (A)

Thermodynamic release( ambient temp )

Operationalcurrent ofmagneticrelease (A)

1.05In(cold state)
Inoperative time(h)

1.30In(heat state)
Operative time(h)



< 1




< 2



< 2


Table 3

Rated current ofrelease (A)

Thermodynamic release( ambient temp )

Operational current of magnetic release (A)

1.0In(cold state)
Inoperative time(h)

1.20In(heat state)
Operative time (h)

1.50In(heat state)
Operative time (h)

7.2In(cold state)
Operative time(h)





4s< Tp ≤10s
6s< Tp ≤20s




350A Small Molded Case Circuit Breaker 4 Pole MCCB with Motor Distribution 

Normal application environment:


Altitude ≤ 2000m

Ambient temperature -5~+40

Tolerance of the influence of humid air.

Tolerance of the influence of salt mist and oil mist.

Maximal gradient is 22.5

Kept in the media without explosive hazard.

There is no conductive dust or gas which is able to erode metal or destroy insuation

Kept in the place where no sleet will attack.






About us:

1. Certificates: CE, CB, Semko, SAA, TUV, UL, KEMA, ISO9001:2008

2. We have 27 years of manufacturing and 17 years of exporting experience

3. We have completely sales service system, ensures every detail is smooth

4. We have new designed products each year by our R&D Department

5. Perfect testing system ensures each product is qualified

6. We have a good reputation in UK, Spain, Germany, Australian, UAE, Turkey, Brazil, Colombia,

     HK, Singapore, Malaysia and other areas

Contact Details
Zhejiang KRIPAL Electric Co., Ltd.

Contact Person: Allen

Tel: +8613780109789

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