Product Description
Product Description
BKZF(R)-12 Medium Voltage Drawout type
Type: AC contactor
Specifications:
vacuum AC contactors utilize vacuum bottle encapsulated contacts to suppress the arc. This arc suppression allows the contacts to be much smaller and use less space than air break contacts at higher currents. As the contacts are encapsulated, vacuum contactors are used fairly extensively in dirty applications, such as mining.
Vacuum contactors are only applicable for use in AC systems. The AC arc generated upon opening of the contacts will self-extinguish at the zero-crossing of the current waveform, with the vacuum preventing a re-strike of the arc across the open contacts. Vacuum contactors are therefore very efficient at disrupting the energy of an electric arc and are used when relatively fast switching is required, as the maximum break time is determined by the periodicity of the AC waveform.
Can be use in KYN28-12 medium voltage metal clad drawout type switchgear assemblies.
Main technical parameters:
NO. | Parameters | Unit | Value | ||||||
BKZC(R)-12-630/400/250 | BKZC(R)-12-630/400/250 | ||||||||
1 | Rated Voltage | kV | 7.2 | 12 | |||||
2 | Rated Current | A | 630 | 400 | 250 | 630 | 400 | 250 | |
3 | Rated closing current (rms) | A | 6300 | 4000 | 2500 | 6300 | 4000 | 2500 | |
4 | rated breaking current | 5040 | 3200 | 2500 | 5040 | 3200 | 2500 | ||
5 | 4S thermal current | 6300 | 4000 | 2500 | 6300 | 4000 | 2500 | ||
6 | Limit breaking current | 6300 | 4000 | 2500 | 6300 | 4000 | 2500 | ||
7 | Power frequency withstand voltage | kV | 32 | 42 | |||||
8 | operating frequency | Times/h | 300 | ||||||
9 | Electric life time | AC-3 | ×104 Times | 25 | |||||
AC-4 | 10 | ||||||||
10 | Mechanical life | 30 | |||||||
11 | Rated operating voltage | V | AC110/220 | ||||||
12 | Closing coil pull current | A | ≤ DC6/3 | ||||||
13 | Holding coil holding current | D:DC0.32/0.16 | |||||||
14 | Shunt trip coil current | J:DC2.5/1.3 | |||||||
NO. | Parameters | Unit | Value | |
BKZC(R)-12-630/400/250 | BKZC(R)-12-630/400/250 | |||
1 | contact distance | mm | 4.5+1.0/-0.5 | 6+1.0-0.5 |
2 | contact overtravel | 1.5±0.5 | ||
3 | Average closing speed | m/s | 0.1~0.25 | |
4 | Average opening speed | 0.3~0.6 | ||