BWY-804/806 Model Thermostat
Date: July 14, 2025 14:51:49
product positioning
Designed for power transformer top oil temperature measurement and control, is BWY-802/803 upgraded model, 804 (four groups of switches) and 806 (six groups of switches) two kinds of specifications, can be directly driven by the cooling system and the output of alarm signals.
Designed for power transformer top oil temperature measurement and control, is BWY-802/803 upgraded model, 804 (four groups of switches) and 806 (six groups of switches) two kinds of specifications, can be directly driven by the cooling system and the output of 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.
