BQ - Bimetall Maximum Current Meter



  • Current transformer use
  • Good read-out survey on larger distance
  • Exchangeable dial
  • Resistance to mechanical vibrations
  • Protective cover for terminals (optional)
  • BQ 48…144 are according to DIN 43700
  • BQ 45 rail mounting according to DIN 46277 and EN 50022


The bimetallic instruments are intended especially for thermal monitoring of transformers, cables, etc. due to their slow reaction to current changes. They indicate mean r.m.s. current value during the measuring period of the instrument. The instrument does not react to short current pulses essentially. Maximum mean value in a response time period is indicated by the red slave pointer. The latter can be reset or set to zero by means of a knob which can be sealed.


Special instrument design enables quick replacement of the scale both in case of a new or an already used instrument. This is especially suitable for instruments which are connected to current transformers.

Technical Data

Accuracy Class: 3 (according to EN 60 051)
Housing: Polycarbonat uninflammable, according to UL 94 V-0

Housing IP 52
Terminals IP 00 (IP 20 at size 45)
according to 60529: 1989

Position: vertical ± 5°
Ambient Conditions
Climatic Class: 2 according to VDE/VDI 3540
Temperature: Reference range of operation+18 … +28°C
Nominal range of operation-25 … +55°C
Storing -40 … +70°C
Humidity: ≤ 80 % (without condensing)


en-List-7-Analogue-Panel-Meters.pdf    (Page 11)


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