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Equipment > Low-voltage equipment
Automatic three-phase
circuit breakers VA57f35
VA 57f35 is a series of automatic circuit
breakers that are designed for conducting current under normal conditions and
for cutting it off in the event of a short circuit, an overload or an unacceptable
voltage drop. In addition, it can be used for infrequent (up to 30 times per day)
on and off switching of electric circuits.
VA57-35
- X X XX X X - 20 X3
VA - device type;
57
- series number;
35 - rated current 250 A
X -
number of poles and number of maximum-current release devices:
3
- 3 poles with maximum-current release devices in each one;
8
- 2 poles with release devices in two poles, triple-pole construction;
6
- 3 poles with release devices in two poles;
X - maximum-current
release devices construction, according to protection zone:
3
- release device in short-circuit current zone;
4 - release device in short-circuit
current and overload current zone;
XX - auxiliary assembly units
combination;
X - drive type and circuit breaker mounting method:
1 - hand drive, stationary construction;
3
- electromagnetic drive, stationary construction;
5
- remote hand drive, drawout construction;
7
- electromagnetic drive, drawout construction;
X - construction
according to additional mechanisms:
0 - no mechanisms;
5
- remote hand drive for operation through the distribution device door;
6
- "OFF" position locking device for stationary construction circuit
breaker;
20 - circuit breaker protection rate, according to GOST
14255-69: IP20;
H3 - climatic construction and placement category,
according to GOST 15150-69: UHL4, T3.
| Specifications |
VA 57-35 | VA 57F35 |
| Circuit breaker rated current
(In), A | 250 |
250 | | Rated current
of the thermal overload release devices, A |
16; 20; 25; 31.5; 40; 50; 63; 80; 100; 125; 160; 200; 250 |
AC voltage / frequency, V/Hz
DC, V |
660 / 50-60
440* | 380 / 50-60
220 |
Maximum switching capacity,
kA
under voltage U and cos j | 3.5 ¸18
under 660; 0.3 | 3.5 ¸
10
under 380 | |
Switching wear resistance, On/Off cycles |
4000 | | Weight, kg
| 3.3 | |
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