Conventional accessories
Buchholz relays
Insulation liquid inside the transformer needs to be monitored to reduce any risk of transformer failure to a minimum. Buchholz relays to provide information about any internal malfunction indicated by gas accumulation in the liquid and keep oil flow speed monitored and under control.
Choose our solution and assure reliable and safe operation of the transformer and a power supply network. You will get a reliable product designed to promptly stop the system when necessary to prevent any catastrophic failure.
Contact us and get support with the product selection.

Why buy
- Proven technology
- Adjustable value settings for alarms and switches
- Easy installation
- Maintenance free
Application
- Liquid-filled transformers
- Hermetically sealed transformers
- Transformers with conservator with rubber bag
- On-load tap-changers
- Railway & Traction applications
- Suitable for new installations and retrofits
- Suitable for offshore environment
- Suitable for seismic environment
- Suitable for tropical climates
Additional accessories
Gas sampling device type GSD2

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Technical data at a glance
Standard | IEC 60076-22-1 | ||
Housing | Alluminum alloy | ||
Types of installation environment | Indoor | Corrosion class: C4-Medium | RAL 7032 |
Outdoor | Corrosion class: C4-Medium | RAL 7032 | |
Tropical proof | Corrosion class: C5-Medium | Geomet coatings | |
Off Shore | Corrosion class: CX | RAL 7035 | |
Nominal pipe diameter | DN25, DN50 and DN80 or G 1/2 threaded connection | ||
Inspection glass | Tempered glass with UV filter | ||
Oil temperature | From -40°C up to +120°C | ||
Ambient temperature | From -40°C up to +80°C Lower temperature available upon request | ||
Switches | Up to 4 | ||
Max. nominal current | 2A | ||
Min. switching current | 10 mA/24 V dc (golden contact is available for lower current) | ||
Rated insulation voltage | 2.5 kV ac 1 min between contacts and earth, 1.0 kV ac 1 min between open contacts | ||
Flow vents speed | 10 m/s to 3.0 m/s (each +- 15%) | ||
Cable gland | 1; M25x1.5 | ||
Degree of protection | IP65 IP66 available upon request | ||
Mechanical test (vibration class) | 4M4 Class 4M6 Class available upon request |