Over-voltage release MZ209

Permanent over-voltages may lead to premature failure of sensitive electronic devices used at homes & offices, causing loss of property and inconvenience.

MZ209

An electrical network may experience permanent over-voltages due to loss of neutral, faulty connections or harmonics. Hager Over-voltage release MZ209 is an ideal solution to protect installations from harmful effects of permanent over-voltages.
MZ209 can be combined with Hager MCBs, RCCBs & RCBOs to provide comprehensive protection against over-voltages in domestic & commercial installations.

Hager MZ209 over-voltage release
1.Monitors the supply voltage – between phase & neutral conductors.
2.Protects the equipments – trips the associated circuit breaker (MCB, RCCB or RCBO) if voltage exceeds 280V for more than a millisecond.
3.Prevents reclosing – Circuit breaker can not be switched ON until supply voltage comes back to normal level.

Technical details

  • Catalog number – MZ209.
  • Rated voltage – 240V AC, 50Hz.
  • Tripping voltage - > 280V AC.
  • Tripping time – instantaneously.
  • Size – 1 module (17.5mm).
  • Compatibility – MCBs, RCCBs*, RCBOs.
  • Trip indication thru Red color flag on front face.

Features & benefits

  • Effective protection to electrical installation against over-voltages.
  • Red color flag to show tripping due to over-voltage.
  • Modular & compact – only 1 module space (17.5mm).
  • Can be used in new as well existing installation without any changes in wiring.
  • Easy & simple installation.
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