MESSKO® MSAFE®
Buchholz relay – protection system MSAFE® for transformers
More than 100 years of experience went into the design of the rugged MESSKO® MSAFE® Buchholz relay. It reliably protects fluid-filled transformers and reactors with an expansion tank. The MR standard ensures maximum operating safety: Every device is subjected to a helium leak test. MESSKO® MSAFE® features integrated solid-body floats as well as protective magnetic switches and test buttons separated from the oil. Remote testing is possible via compressed air line. A wide range of flanges and an additional gas removal device are available for the device. An offshore version is also available.
Your Advantages at a Glance
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Long service life thanks to high-quality materials
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High operating safety due to helium leak test for oil and gas tightness
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Protective magnetic switches to prevent false triggering
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Switch replacement possible without interfering with the oil circuit
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100% retrofittable
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Solid-body floats
Product Information
| Operating temperature | -40...+115 °C |
| Ambient air temperature | -50...+80 °C |
| Corrosion protection class | CX standard |
| Degree of protection | IP66 in accordance with DIN EN 60529 |
| Flange version | DN25, DN50 and DN80 or G1 1/2 threaded connection |
| Number of switches | 1 or 2 (Max. 4 N/C contacts, N/O contacts and/or changeover contacts) |
| Flow rate | 1ms - 3ms (others on request) |
| Electric connection | M25x1.5 for cable ø 13...20 mm or 1/2“ NPT |
| Inspection glass | Tempered glass with UV filter |
| Mechanical stress | Class 4M6 in accordance with IEC60721-3-4 |
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| Operating temperature | -40...+115 °C |
| Ambient air temperature | -50...+80 °C |
| Corrosion protection class | CX standard |
| Degree of protection | IP66 in accordance with DIN EN 60529 |
| Flange version | DN25, DN50 and DN80 or G1 1/2 threaded connection |
| Number of switches | 1 or 2 (Max. 4 N/C contacts, N/O contacts and/or changeover contacts) |
| Flow rate | 1ms - 3ms (others on request) |
| Electric connection | M25x1.5 for cable ø 13...20 mm or 1/2“ NPT |
| Inspection glass | Tempered glass with UV filter |
| Mechanical stress | Class 4M6 in accordance with IEC60721-3-4 |
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