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300A 350A 400A MCCB Motor Short Circuit Protection Residential Circuit Breakers 

Place of Origin: Zhejiang, China (Mainland) 
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Product Detail

Model No.: UKM30-400

 300A 350A 400A MCCB Motor Short Circuit Protection Residential Circuit Breakers The UKM30 series mol

 
300A 350A 400A MCCB Motor Short Circuit Protection Residential Circuit Breakers
 
The UKM30 series molded case circuit breaker is high-tech products in 21st century with advanced design, high performance, pleasant apprearance and delicate dimension.
 
 
Description:
 
UKM30 series molded case cicuit breaker is suitable for circuit AC 50Hz/60Hz, rated voltage up to AC660V, Rated operating current up to 250A. It features normal structure reliable performance, high breaking capacity, used for power distribution and protecting the circuit and electrical equipment
against overload and short circuit. It complies with standard of IEC 60947-2.
 
 
Specifications:

TypeUKM30-400SUKM30-630SUKM30-800S
Rated current In(A)250,300,350,400400,500,630630,700,800
Number of poles343434
Rated voltage Ui(V)AC690VAC690V AC690V
Arc distance (mm)≤50≤50 ≤50
Rated ultimate short-circuit breaking capitily Icu/Ics(KA)AC690V10/10 10/10 15/15
AC400V70/7070/70 70/70
AC230V100/100100/100100/100
Operational performance (times)ON1000500500
OFF400025002500
Dimensions (mm)a140185210280210280
b257275275275
c103103103103
Weight(kg)5.57.510.914.211.415.7
Rated operation frequency 602020

 
 
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)

10≤In≤63

≥1

< 1

10In±20%

225≤In≤630

≥2

< 2

100≤In≤800

≥2

< 2

5In±20%


 
 Table 3

Rated current ofrelease (A)

Thermodynamic release( ambient temp )

Operationalcurrent ofmagneticrelease (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)

10≤In≤225

≥2

<2

≤4min
≤8min

4s< Tp ≤10s
6s< Tp ≤20s

12In±20%

225≤In≤630

 

 
Benefits
1.Reduce energy and operations costs
2.Improve power quality, reliability and uptime
3.Optimize equipment use
 
Applications
1.Building: Hotels, hospitals, offices and retalis
2.Data center and Networks
3.Industry: Mining and minerals, automotive, food and beverage and chemical industry
4.Energy and infrastructures: Airports, oil and gas, water, electrical energy and marine
 
 
Circuit breaker power loss:
 

 

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 Mr. Michael Deng

Tel: 86-571-62865157
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Company Info

Zhejiang KRIPAL Electric Company [China (Mainland)]


Business Type:Manufacturer
City: Hangzhou
Province/State: Zhejiang
Country/Region: China (Mainland)

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