Dobrich, Bulgaria, since 1965
Electrical power equipment up to 35 kV
ZAVN-Dobrich AD is the successor of the High-Voltage Apparatus Works founded in 1965. We design, manufacture and test packaged transformer substations, switchgear, switchboards and instrument transformers, with the machinery to build, fit out and deliver every product to the client.
- Incoming 20 kVcable or overhead
- VPm fuse7.2 · 12 · 24 kV
- Switchgear with vacuum breaker7.2 · 12 · 24 kV
- Current transformer TKS10 · 20 · 35 kV
- Voltage transformer NKMV
- Power transformer20 / 0.4 kV in an MKTP or BKTP
- LV switchboard on epoxy insulators0.4 kV
What we make
The nine product groups of the factory, each with its rated voltage. Every page has the technical data as a PDF.
- 7.2 · 12 · 24kV Packaged transformer substations (MKTP and BKTP)7.2, 12 and 24 kV, with ABB, Siemens and Schneider apparatus
- 7.2 · 12 · 24kV Switchgear assemblieswith minimum-oil, SF₆ and vacuum circuit breakers, 7.2, 12, 24 kV
- 0.4kV Low-voltage switchboards0.4 kV, to BDS EN 60439
- 0.5kV Indoor current transformers0.5 kV, up to 3000 A
- 10 · 20 · 35kV Current transformersfor 10, 20 and 35 kV, from 10 to 4000 A
- 7.2 · 12 · 24kV Medium-voltage voltage transformersNK series, for 6, 6.3, 10, 15 and 20 kV
- 0.66 · 7.2 · 12 · 24kV Epoxy insulators0.66, 7.2, 12 and 24 kV, and epoxy parts to the client's drawings
- 7.2 · 12 · 24kV High-power fuses type VPm7.2, 12 and 24 kV, current-limiting
- MVmedium voltage Retrofit and rehabilitation of MV switchgear breakersreplacing minimum-oil breakers with vacuum and SF₆ ones
Concrete packaged transformer substation (BKTP) 
Switchgear assembly 
Epoxy insulators 
Low-voltage switchboards 
Vacuum breaker trolley in a switchgear cubicle
The factory
Our own production and warehouse site in Dobrich, with blanking and machining sections, an assembly section and a room for electrostatic powder coating.
- 1965the year the High-Voltage Apparatus Works was founded
- 19,000 m²site area
- 5,000 m²built-up area
- 35 kVupper limit of the products
The factory has the only pressure-casting installation for epoxy parts in the country (Vimex-Vet) and a vacuum casting installation for instrument transformers (Micafil). That makes the company the only manufacturer of epoxy insulators, special epoxy parts and instrument transformers up to 35 kV in Bulgaria.
A quality management system based on the international standard ISO 9001:2008 is in place and maintained.
Two laboratories
Tests and verifications are made at the factory, for our own production and for outside clients.
Testing laboratory
An independent unit on two sites, equipped for every test the company's work requires, calibrated with traceability to national and international standards.
Laboratory for verification of instrument transformers
Initial verification of current and voltage transformers at 15 Hz to 100 Hz by the differential-null method, confirmed with initial verification marks.
Companies that trusted us
- Kozloduy NPP
- Enemona Holding
- Interkomplex OOD
- Elsnab AD
- Elektra-94 OOD
- Mobiltel EAD
- Atomenergoremont EAD
- Maritsa 3 TPP
- EON
- EVN
- CEZ
Power generation, transmission and distribution companies, the communications sector, electrical installation and construction firms, foreign investors and general contractors of major sites.
Certificates
The documents the factory publishes: each opens at full size, with the PDF to download.
-
ISO 9001:2008 certificate Bureau Veritas Certification, No 231009. Scope: manufacture of electrical power equipment up to 35 kV. PDF -
Type-approval certificate – TKS-12 Bulgarian Institute of Metrology, No 06.09.4644: current transformer type TKS-12. PDF -
Type-approval certificate – TKS-24 Bulgarian Institute of Metrology, No 07.06.4731: current transformer type TKS-24. PDF -
Type-approval certificate – NK-24, NK-12, NK-7.2 State Agency for Metrology and Technical Surveillance, No 06.01.4523: voltage transformer type NK-24. PDF -
Type-approval certificate – NK-I-24, NK-I-12, NK-I-7.2 State Agency for Metrology and Technical Surveillance, No 06.01.4522: voltage transformer type NK-I-24. PDF
Project “Improving the production capacity of ZAVN-Dobrich AD”
- Programme
- Operational Programme “Innovation and Competitiveness” 2014-2020, co-financed by the European Union through the European Regional Development Fund
- Priority axis
- 2 “Entrepreneurship and capacity for growth of SMEs”
- Procedure
- BG16RFOP002-2.001 “Improving the production capacity in SMEs”
- Contract
- BG16RFOP002-2.001-0932-C01 with the Ministry of Economy
- Beneficiary
- ZAVN-Dobrich AD
- Total eligible costs
- BGN 724,000 (BGN 430,780 European and BGN 76,020 national co-financing)
- Duration
- 16 months
Main goal: introducing new technologies that improve resource efficiency and effectiveness in the production process of ZAVN-Dobrich AD through the purchase of production equipment: a CNC punching machine, a five-axis CNC press brake, a horizontal hydraulic press and a hydraulic corner-notching machine.
Specific goals:
- introducing innovative mechatronic technologies that improve resource efficiency and effectiveness in the production process;
- improving the quality and increasing the quantity of the output;
- entering additional markets in Bulgaria and abroad.
Ask about a product or a test
Call or write: we answer with a technical solution and an offer for your site.
- zavn@abv.bg
- Fax
- +359 58 / 600 532
- Address
- 18 Sveshtenik Pavel Atanasov St, Dobrich, Bulgaria · See it on the map
- Contact person
- Yasen Yanakiev, Eng.