KM1 series moulded case circuit breaker is one of products developed and manufactured by adopting international advanced technology. It is supplied with rated insulating voltage 800V and used for circuit of A.C. 50Hz, rated operating voltage AC 400V (or below), rated operating current up to 800A for infrequent changing over and starting of the motors.The products conforms to IEC60947-2 standard.
| Main Technical Specifcation
| Type | Rated
current(A) | Pole
num-
ber | Rated
insui-
ating
volt
age
(V) | Rated
operat-
ing
volt
age
(V) | Arcing-
over
distance
(mm) | Ulimate
short
circuit
breaking
capacity
(KA) | Servies
short
circuit
breaking
capacity
(KA) | Operation
perform-
ance | Utiliza-
tion
cat-
egory |
| Load | Unload |
| KM1-63L | (6),10,16,20,
25,32,40,50,63 | 34 | 500V | 400V | 0 | 25 | 18 | 1500 | 8500 | A |
| KM1-63M | 0 | 50 | 35 |
| KM1-100L | (10),16,20,25,32,
40,50,63,80,100 | 800V | 0(≤50) | 35 | 22 |
| KM1-100M | 0(≤50) | 50 | 35 |
| KM1-100H | 0(≤50) | 85 | 50 | 1000 | 7000 |
| KM1-225L | 100,125,160,
180,200,225 | ≤50 | 35 | 22 |
| KM1-225M | ≤50 | 50 | 35 |
| KM1-225H | ≤50 | 85 | 50 | 1000 | 4000 |
| KM1-400L |
225,250,315,
350,400 | ≤50 | 50 | 35 |
| KM1-400M | ≤100 | 65 | 42 |
| KM1-630L | 400,500,630 | ≤100 | 50 | 35 |
| KM1-630M | ≤100 | 65 | 42 |
| KM1-630H | ≤100 | 100 | 65 |
| KM1-800M | 630,700,800 | 3 | ≤100 | 75 | 50 |
| KM1-800H | ≤100 | 100 | 65 |
| KM1-1250M | 10,001,250 | ≤100 | 100 | 65 |
| KM1-1250H | ≤100 | 125 | 75 |
Note: 6A no thermal protection
The N-pole of four-poles breaker is sifed at the right side of the product has four types:
Type A: No current trip-lease on N pole which making all the time, not closing and opening with the other three poles.
Type B: No current trip-release on N pole which closing and opening with the other poles.
Type C: With current trip-release which closing and opening with the other three poles.
Type D: With current frip-release which making all the time not closing and opening with the other threepoles.
| 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).
Rated current of
release (A) | Thermodynamic Release(ambient temp)
land +40℃ marine +45℃ | Operational
current of
magnetic
release (A) |
1.05In(cold state)
Inoperative time(h) | 1.30ln(heat state)
operative time(h) |
| 10≤In≤63 | ≥1 | <1 | 10ln±20% |
| 63<In≤100 | ≥2 | <2 |
| 100<In≤800 | ≥2 | <2 | 5ln±20%
10ln±20% |
Rated current of
release (A) | Thermodynamic Release(ambient temp)
land +40℃ marine +45℃ | Operational
current of
magnetic
release (A) |
1.0ln(cold
state)
Inoperative
time(h) | 1.20ln(heat
state)
operative
time(h) | 1.50ln(heat
state)
operative
time(h) | 7.2In(cold state)
operative time(h) |
| 10≤In≤225 | ≥2 | <2 |
≤4min
≤8min | 4s<Tp≤10s | 12In±20% |
| 225<In≤630 | 6s<Tp≤20s |
