Products overviews
NDM3A series of molded case products apply to infrequent switching of circuits with the AC 50Hz (or 60Hz), the rated working voltage of 1000V and rated working current of 630A.With the overload, short circuit and undervoltage protection functions, the circuit breaker can protect lines and power equipment from damage. The molded case circuit breaker is widely used in new energy industry, plant, building, household and other occasions.
Main Technical Parameters
NDM3A-250 series
Rated current of frame Inm (A) | 250 | |||||
Rated current In (A) | 63, 80, 100, 125, 140, 160, 180, 200, 225, 250 | |||||
Rated insulation voltage Ui (AC V) | 1140 | |||||
Rated impulse withstand voltage Uimp (V) | 8000 | |||||
Power frequency withstand voltage U (V) | 3500 | |||||
Rated working voltage Ue (AC V) | 550 | 600 | 690 | 800 | 1000 | |
Rated limit short-circuit breaking capacity Icu (kA) | 50 | 42 | 35 | 30 | 12 | |
Rated operating short-circuit breaking capacity Ics (kA) | 50 | 42 | 35 | 23 | 12 | |
Operating performance (times) | Electrical life | 4000 | 2500 | 2000 | 1500 | 1000 |
Mechanical life | 10000 | |||||
Boundary dimensionm (mm) | 107×165×103 |
NDM3A-400 series
Rated current of frame Inm (A) | 400 | |||||
Rated current In (A) | 225, 250, 315, 350, 400 | |||||
Rated insulation voltage Ui (AC V) | 1140 | |||||
Rated impulse withstand voltage Uimp (V) | 8000 | |||||
Power frequency withstand voltage U (V) | 3500 | |||||
Rated working voltage Ue (AC V) | 550 | 600 | 690 | 800 | 1000 | |
Rated limit short-circuit breaking capacity Icu (kA) | 50 | 42 | 35 | 30 | 12 | |
Rated operating short-circuit breaking capacity Ics (kA) | 50 | 42 | 35 | 23 | 12 | |
Operating performance (times) | Electrical life | 4000 | 2500 | 2000 | 1500 | 1000 |
Mechanical life | 10000 | |||||
Boundary dimensionm (mm) | 150×257×104.5 |
NDM3A-630 series
Rated current of frame Inm (A) | 630 | |||||
Rated current In (A) | 400, 500, 630 | |||||
Rated insulation voltage Ui (AC V) | 1140 | |||||
Rated impulse withstand voltage Uimp (V) | 8000 | |||||
Power frequency withstand voltage U (V) | 3500 | |||||
Rated working voltage Ue (AC V) | 550 | 600 | 690 | 800 | 1000 | |
Rated limit short-circuit breaking capacity Icu (kA) | 50 | 42 | 35 | 30 | 12 | |
Rated operating short-circuit breaking capacity Ics (kA) | 50 | 42 | 35 | 23 | 12 | |
Operating performance (times) | Electrical life | 4000 | 2500 | 2000 | 1500 | 1000 |
Mechanical life | 10000 | |||||
Boundary dimensionm (mm) | 182×270×108.5 |