Rotor indicator

Short-circuit indication by pivoted rotor

The rotor indicator and fluid indicator are mechanical short-circuit indicators which are designed to detect short-circuit currents in medium voltage distribution networks.

The indicators are tripped by a magnetic field strength "H" which is induced by trip values I>>.

Rotor indicator: The pivoted rotor with reset pin uses a two-colour indication to inform the user of the state of the rotor indicator. “Black” means that the indicator has not been tripped whereas “red” indicates that the indicator has been tripped.

Fluid indicator: When a short-circuit occurs, the mixer is pulled up by the magnetic field stirring up red particles in the fluid. The indication resets automatically after six to eight hours once the red particles have set to the bottom of the mixer.

  • „Mechanical design
  • „„Installation on cables or busbars
  • Rotor indicator: fault indication by pivoted rotor
  • Fluid indicator: fault indication by fluid with red coloured particles
  • Retrofit ready

Your advantages

  • Universal use
  • Rotor indicator: reliable fault detection during re-energising
  • Fluid indicator: automatic reset
  • Maintenance-free, no battery

Technical specifications

Earth fault detection methods

Earth short-circuit

Low-impedance/short-term low-impedance earthed ---
Isolated earthed -
Resonant earthed -
Rotor indicator: Short-circuit trip current

150 – 2,000 A (factory setting)

Fluid indicator: Short-circuit trip current

400, 600, 1,000 A (factory setting)

Rotor indicator: Response delay short-circuit

100 ms at rated trip value

Fluid indicator: Response delay short-circuit

200 ms at rated trip value

Reset rotor indicator

Manual with hot stick

Reset fluid indicator

Automatic time reset: ca. 6 – 8 h

Housing

Housing and fixing screws made from polyamide

Yoke made from ferromagnetic steel

Temperature range -40 to +85 °C
Cable diameter -

Accessories

Produktfinder Product finder Kontakt Contact