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Fluid Indicator

The Fluid Indicator is a mechanical short-circuit indicator which is designed to detect short-circuit currents in medium voltage distribution networks.

Mechanical Short-Circuit Indicator

Product Features

  • Mechanical design
  • Installation on cables or busbars
  • Fault indication by fluid with red coloured particles
  • Retrofit ready

Your advantages

  • Universal use
  • Automatic reset
  • Maintenance-free, no battery

The fluid indicator is a mechanical short-circuit indicator which is designed to detect short-circuit currents in medium voltage distribution networks.

The indicator is tripped by a magnetic field strength “H” which is induced by trip values I>>. 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.


Technical Data

Technical Data

Indicator with Fluid

I>> Short-circuit trip current

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

 

tI>> Response time

 

200 ms at rated trip value
(100 ms are available on request)

Accuracy

±20 %

Reset

Automatic reset by time: after about 6 to 8 h

Material

  • Housing and fixing screws made from polyamide

  • Yoke made from ferromagnetic steel

Temperature range

-40 to +85 °C

Product

Note Item Number

Fluid indicator

Imin = 400 A
for cable Ø  8 – 16 mm

Screws for fixing the conductor made of steel

Item Number20-0401-000

Fluid indicator

Imin = 400 A
for cable Ø 16 – 20 mm

Item Number20-0402-000

Fluid indicator

Imin = 400 A
for cable Ø 20 – 30 mm

Item Number20-0403-000

Fluid indicator

Imin = 400 A
for cable Ø 30 – 40 mm

Item Number20-0404-000

Fluid indicator

Imin = 600 A
for cable Ø 40 – 50 mm

Item Number20-0405-000

Fluid indicator

Imin = 600 A
for cable Ø 50 – 60 mm

Item Number20-0406-000

Fluid indicator

Imin = 1.000 A
for cable Ø 60 – 80 mm

Item Number20-0408-000

Fluid indicator

Imin = 400 A
for busbar 30 x 4 – 40 x 10 mm

Screws for fixing the conductor made of steel

Item Number20-0420-000

Fluid indicator

Imin = 400 A
for busbar 20 x 4 – 25 x 6 mm

Screws for fixing the conductor made of steel

Item Number20-0422-000

Fluid indicator

Imin = 400 A
for busbar 25 x 4 – 30 x 6 mm

Screws for fixing the conductor made of steel

Item Number20-0423-000

Fluid indicator

Imin = 400 A
for busbar 45 x 4 – 60 x 12 mm

Screws for fixing the conductor made of steel

Item Number20-0421-000

Fluid indicator

Imin = 400 A
for busbar 30 x 4 – 40 x 15 mm

Screws for fixing the conductor made of steel

Item Number20-0410-000


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