Buchholz relays

Buchholz relays and gas extraction devices in accordance with various standards

Our Buchholz relays are characterized by a rugged design, formed from the experiences of more than 100 years of measuring, control and safety technology.

The Buchholz relay takes on the function of a central protective device for fluid-filled transformers and reactors with an expansion tank. Installed in the pipeline between the tank and expansion tank, it responds to errors that occur inside the transformer being protected. Damage can be detected by the Buchholz relay early, thus preventing destruction.

MESSKO® MSAFE®

More than 100 years of experience went into the design of the rugged MESSKO® MSAFE® Buchholz relay. It reliably protects fluid-filled transformers and…
+ Long service life thanks to high-quality materials
+ High operating safety due to helium leak test for oil and gas tightness
+ Protective magnetic switches to prevent false triggering

CEDASPE® EB

Buchholz relays detect faults and minimize the propagation of any damage which might occur within oil-filled transformers. The Buchholz relay senses…
+ BTS - quick delivery on selected variants
+ Waterproof - IP 65 protection degree
+ Large inspection window

CEDASPE® ET

Buchholz relays detect faults and minimize the propagation of any damage which might occur within oil-filled transformers. Short circuit faults such…
+ Waterproof - IP 65 protection degree
+ Large inspection window
+ Inlet diameter: 25 mm, 50 mm, 75 mm and 100 mm

RR Series Buchholz relay (former ETI)

Buchholz relays detect faults and minimize the propagation of any damage which might occur within oil-filled transformers. Short circuit faults such…
+ Flow vane disengaged from the lower float: separate contacts (up to 6)
+ Independent switches for the upper and lower float and flow vane
+ Mechanical test button to test independently the three sets of switches, also remoted to man level

GQ Series Buchholz relay (former ETI)

Buchholz relays detect faults and minimize the propagation of any damage which might occur within oil-filled transformers. Short circuit faults such…
+ Flow vane disengaged from the lower float: separate contacts (up to 4)
+ Independent switches for the upper and lower float and flow vane
+ Mechanical test button to test independently the three sets of switches, also remoted to man level

CEDASPE® DAROC (former ETI)

The DAROC oil check valve is designed to prevent the oil contained in the conservator from flowing out when a leak occurs and, for Series EDS-R, to…
+ The most accurate and reliable device in the market: It prevents loss of conservator oil in case of tank leakage
+ Its operation is completely automatic
+ Optional remote reset ensured by an addition by-pass pipe

MESSKO® MSAFE® Gas Sampler

These gases can be used for a specific analysis to provide information on the status of the transformer or on-load tap-changer. When installed at a…

CEDASPE® RG3

The CEDASPE® RG3 body is made of aluminum alloy casting with a large inspection window with a graduated scale. CEDASPE® RG3.2 is equipped with a…
+ BTS - quick delivery on selected variants
+ Large inspection window
+ Suitable for gas analyzer devices

MESSKO® Gas Quick Test

Fault gases can be detected easily, quickly and safely with the quick gas test. Based on the color change of the indicators integrated into the glass…
+ Quick fault gas detection
+ No use of separate chemicals

MESSKO® Test Pump

Checks the correct operation of the upper contact system (alarm) of the MESSKO® MSafe® Buchholz relay by air injection. Direct use on the Buchholz…
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