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AM8 series
AM8 Series Moulded Case Circuit Breakers 

AM8 series MCCB is one of our new products developed and manufactured by adopting international advanced technology. It is supplied with rated insutaling voltage 690V and used for circuit of A.C.50/60Hz, rated operating voltage A.C. 415V or below, rated operating current from 16A to 250A. It is designed for protection of electric circuit, motors, transformers and other equipments. The products conforms to GB14048.4, IEC60947-1, IEC60947-2 & VDE0660 stardands. 


Main technical Specifications
Type Rated Cureent(A) Pole number Rated 
Insultating Voltage(V)		 Rated 
Opreating Voltage(V)		 Arcing Over Distance(mm) Ultimate Short 
Circuit Breaking Capacity(KA)		 Servies Short 
Circuit Breaking Capacity(KA)		 Operation performance
ON OFF
AM8-160D 16,20,25,32,
40,50,63,80,
100,125,160		 Three
four
pole		 690V 380V/415V 100 25 25 4500 10000
AM8-160N 30 30
AM8-160H 70 70
AM8-160L 100 100
AM8-250N 200,225,250 35 35
AM8-250H 70 70
AM8-250L 100 100 4000 8000

Motion 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 breakers).
Table 2
Rated current of release(A)

Thermodynamic Release
(ambient templand +40℃ marine +45℃)

 Operational current of 
magnetic release(A)
1.05In(cold state)
inoperative time(h)		 1.30In(heat state)
operative time(h)
10≤In≤63 ≥1 < 1 10In±20%
63<In≤100 ≥2 < 2 10In±20%
5In±20%
100<In≤800 ≥2 < 2
 
Table 3
Rated current of release(A)

Thermodynamic Release
(ambient templand +40℃ marine +45℃)

 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)
12.5<In≤400 ≥2 < 2 4min 2s<Tp≤10s 12In±20%

Motion 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 breakers).
Table 2
Rated current of release(A)

Thermodynamic Release
(ambient templand +40℃ marine +45℃)

 Operational current of 
magnetic release(A)
1.05In(cold state)
inoperative time(h)		 1.30In(heat state)
operative time(h)
10≤In≤63 ≥1 < 1 10In±20%
63<In≤100 ≥2 < 2 10In±20%
5In±20%
100<In≤800 ≥2 < 2
 
Table 3
Rated current of release(A)

Thermodynamic Release
(ambient templand +40℃ marine +45℃)

 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)
12.5<In≤400 ≥2 < 2 4min 2s<Tp≤10s 12In±20%