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.
Description:
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.
Specifications:
| 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) |
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 ) | 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) |
10≤In≤225 | ≥2 | <2 | ≤4min
≤8min | 4s< Tp ≤10s
6s< Tp ≤20s | 12In±20% |
225≤In≤630 |
Mounting:
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
