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Equipment > Low-voltage equipment
Automatic three-phase
circuit breakers A3790
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A 3790 is a family of automatic circuit breakers that are
designed for operation in networks with an AC voltage of up to 660 V, 50-60 Hz.
They can be used to protect and start asynchronous motors with short-circuited
rotors. - Rated voltage of free contacts
DC 400 V (current 4 A)
AC up to
660 V (current 4 A)
- Rated voltage of independent release device
DC 110; 220 V
AC
440 V
- Rated voltage of zero release device
DC 110; 220 V
AC 127 ¸
660 V
- Rated voltage of electric drive
DC 110; 220 V
AC 127 ¸
660 V
| Standard construction
| A 3792 |
A 3794 | A 3796 |
A 3798 | |
Rated current, A | 630
| | Nominal
voltage, V | AC
up to 660 V | |
Maximum breaking capacity, kA
under the voltage ~380 V, 50 Hz
under
the voltage ~660 V, 50 Hz |
50.5
28.6 | |
Construction according to the mounting method |
stationary; drawout-type; |
| Construction according to the protection type |
current
limiting | current
limiting;
selective | current
limiting | knife switch |
| Construction according
to the maximum-current release device type |
electro-
magnetic | electromagnetic;
semiconductor | electromagnetic;
thermal | |
| Rated currents of maximum-current
release devices, A | 250;
400; 630 | |
Drive type | hand;
remote; electromagnetic | |
Construction by type of auxiliary release devices |
independent;
zero |
| Wear resistance, On/Off cycles
overall
switching
|
6000
3000 | |
Dimensions, mm | stationary
construction - 225x400x160
drawout construction - 318x400x371.5 |
| Volume, dm3
| 14.4 |
| Weight, kg |
13.0 ... 33.0 | | |
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