BWY-804/806 Model Thermostat
Date: July 14, 2025 14:51:49
product positioning
Designed for the measurement and control of oil temperature on top of power transformers, the BWYThe 802/803 is an upgraded version of the 804 (4-switch) and 806 (6-switch) models, which can directly drive the cooling system and output alarm signals.
Designed for the measurement and control of oil temperature on top of power transformers, the BWYThe 802/803 is an upgraded version of the 804 (4-switch) and 806 (6-switch) models, which can directly drive the cooling system and output alarm signals.
core functionality
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Multi-group programmable temperature control switches: full-range arbitrary settings for cooling start/stop, over-temperature alarm, etc.
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Various remote transmission signals are available:
- Model A/AA: Pt100 Platinum Resistance (1 or 2 way)
- J/JJ Models: 4-20 mA current (1 or 2-way)
- Type AJ: Pt100 + 4-20 mA simultaneous outputs -
Outdoor level protection: IP55 protection level, working temperature -40 ℃ ~ +55 ℃, relative humidity ≤95 %.
Main technical parameters
- Measuring range: 0～150 ℃, scale linearity
- Accuracy class: 1.5 (allowable error ±2.25 °C)
- Switching action error: ±2 ℃; switching difference: 6 ±2 ℃
- Contact capacity: AC220 V/5 A or DC110 V/3 A
- Temperature package size: Φ14 × 150 mm, mounting thread M27 × 2
- Capillary length: 6 m standard, customizable up to 18 m.
- Measuring range: 0～150 ℃, scale linearity
- Accuracy class: 1.5 (allowable error ±2.25 °C)
- Switching action error: ±2 ℃; switching difference: 6 ±2 ℃
- Contact capacity: AC220 V/5 A or DC110 V/3 A
- Temperature package size: Φ14 × 150 mm, mounting thread M27 × 2
- Capillary length: 6 m standard, customizable up to 18 m.
mounting
Available in three-hole (144 x 210 mm) or four-hole (100 x 80 mm) mounting sizes.
Available in three-hole (144 x 210 mm) or four-hole (100 x 80 mm) mounting sizes.
BWY-804/806 series oil level thermostats are specially designed forOutdoor Power Transformerdesign, and its applicable environment can be summarized as follows:
| environmental element | permissible range | instructions |
|---|---|---|
| environmental temperature | -40 °C ~ +55 °C | Meet the needs of substations, box transformers, wind farms and other outdoor places in extremely cold or hot areas. |
| relative humidity | ≤95 % (no condensation) | Can work for long periods in coastal, rainy, high humidity or hot and humid climates |
| protection class | IP55 | Dust-proof, water-spray-proof, can be directly mounted on the side wall of the transformer tank or outdoor bracket, without additional rain cover |
| altitude | Conventional ≤ 2000 m (higher to be customized) | Plateau type can be special order, suitable for plateau wind power, photovoltaic booster station |
| electromagnetic environment | Electromagnetic interference | The internal use of mechanical temperature sensing and passive contact, anti-electromagnetic interference ability is better than the electronic thermostat. |
| Vibration/shock | General Industrial Grade | Suitable for transformer body, vehicle-mounted mobile transformer and other vibration locations. |
Typical Application Examples
- 110 kV~1000 kV substation main transformer, high impedance
- Wind/Photovoltaic Booster Transformer
- Distribution transformers for steel mills, chemical plants, data centers, etc.
- Mobile substations, shields, rail transit traction transformers
- 110 kV~1000 kV substation main transformer, high impedance
- Wind/Photovoltaic Booster Transformer
- Distribution transformers for steel mills, chemical plants, data centers, etc.
- Mobile substations, shields, rail transit traction transformers
Therefore, BWY-804/806 can be operated reliably for a long time as long as the ambient temperature is -40 ℃ ~ +55 ℃, the humidity does not exceed 95 % and there is no risk of water immersion in outdoor or semi-outdoor transformers.
