BQ - Bimetall Maximum Current Meter
PB_BQ-Bimetall-Maximum-Strommesser.jpg
Description
Features
- 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
Application
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.
Construction
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 |
| Protection: |
Housing IP 52 |
| 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) |