300A 350A 400A MCCB Motor Short Circuit Protection Residential Circuit Breakers UKM30-400 manufacturer from China Zhejiang KRIPAL Electric Company

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:

Type		UKM30-400S		UKM30-630S		UKM30-800S
Rated current In(A)		250,300,350,400		400,500,630		630,700,800
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	10/10		10/10		15/15
	AC400V	70/70		70/70		70/70
	AC230V	100/100		100/100		100/100
Operational performance (times)	ON	1000		500		500
	OFF	4000		2500		2500
Dimensions (mm)	a	140	185	210	280	210	280
	b	257		275		275	275
	c	103		103		103	103
Weight(kg)		5.5	7.5	10.9	14.2	11.4	15.7
Rated operation frequency		60		20		20

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)
Rated current ofrelease (A)	1.05In(cold state) Inoperative time(h)	1.30In(heat state) Operative time(h)	Operationalcurrent ofmagneticrelease (A)
10≤In≤63	≥1	< 1	10In±20%
225≤In≤630	≥2	< 2	10In±20%
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: