AOMA series thermal overload non-operating circuit breakers are suitable for fire protection power distribution circuits with rated insulation voltage up to 1000V, AC 50Hz, rated working voltage up to 690V, and rated working current 10A to 800A. They are used to distribute circuits and overloads of power equipment. The alarm does not work after a short circuit, etc.
Product features：
Feature 1: U-shaped static contact
Feature 2: modularized accessories
Feature 3: miniaturized frame
Feature 4: contact repulsion device (patented technology)
Feature 5: intelligence
Feature6: modularized arc extinguishing system
Feature 7: unification
Ambient and installation conditions：
l Below 2000 meters above sea level;
l Ambient medium temperature should be within -5℃to +40℃(+45℃for marine products);
l lt can withstand the effect of damp air;
l lt can withstand the effect of moulds;
l lt can withstand the effect of nuclear radiation;
l The max inclination is 22.5 degree;
l lt still can work reliably when the ship subjects to normal vibration;
l lt can still work reliably if the product subjects to the earthquake (4g).
l Places where the surrounding medium is free from explosion danger, and far away from gas or conductive dust that would erode the metal or destroy the insulation;
l keep away from rain or snow.
Main performance indexes：
Type | AOMA-160 | AOMA-250 | AOMA-400 |
Pole | 3P,4P | 3P,4P | 3P,4P
|
Rated current（A） | 16,20,32,40,50,63,80,100,125,140,160 | 100,125,140,160,180,200,225,250 | 250,315,350,400
|
Rated voltage | AC 400V | AC 400V | AC 400V
|
Rated insulation voltage | AC 1000V | AC 1000V | AC 1000V
|
Short-circuit breaking capacity(KA)Icu/Ics | AC 400V | 50/35 | 50/35 | 50/50 |
Operating cycle number | ON | 3000 | 3000 | 2000
|
OFF | 7000 | 7000 | 4000
|
Outline dim. (mm) a-b-c-ca
| 3P | 90-155-88-115 | 105-165-88-115 | 140-257-103-155 |
4P | 120-155-88-115 | 140-165-88-115 | 184-257-103-155 |
Weight (kg)
| 3P | 1.2 | 1.7 | 5.7
|
4P | 1.5 | 2.1 | 7.5
|
Electric operating device (MD) | ● | ● | ●
|
External driving operating handle | ● | ● | ●
|
Automatic release | Thermal electromagnetic type | Thermal electromagnetic type | Thermal electromagnetic type |
