MV
Retrofit and rehabilitation of MV switchgear breakers
ZAVN-Dobrich AD replaces existing minimum-oil circuit breakers with breakers of a new type: vacuum and SF₆ breakers by AREVA, Siemens, ABB, Schneider and others.
What it includes
The replacement is done both in cubicles and in switchgear assemblies. The work includes removal, design, supply, installation, testing and commissioning.
We make trolleys with SF₆ and vacuum breakers for the existing cubicles.
Trolley with a VD4 vacuum breaker 
Cubicle with a new vacuum breaker
The other products
- Packaged transformer substations (MKTP and BKTP)7.2, 12 and 24 kV, with ABB, Siemens and Schneider apparatus
- Switchgear assemblieswith minimum-oil, SF₆ and vacuum circuit breakers, 7.2, 12, 24 kV
- Low-voltage switchboards0.4 kV, to BDS EN 60439
- Indoor current transformers0.5 kV, up to 3000 A
- Current transformersfor 10, 20 and 35 kV, from 10 to 4000 A
- Medium-voltage voltage transformersNK series, for 6, 6.3, 10, 15 and 20 kV
- Epoxy insulators0.66, 7.2, 12 and 24 kV, and epoxy parts to the client's drawings
- High-power fuses type VPm7.2, 12 and 24 kV, current-limiting