BWY-804A,804DTH series transformer temperature controllerDetailed product description：

The BWY-804 Transformer Temperature Controller (hereinafter referred to as the 804 Temperature Controller) is a new generation product developed by our company based on the standard JB/T6302-92 "Pressure Temperature Controllers for Transformers" and the BWY-802 and 803 temperature controllers. Suitable for measuring and controlling oil temperature in medium and large transformers.

The 804 type thermostat has the following new features:
1. Wide applicability:
In response to the intelligent control requirements for unmanned substations, this machine can output the following control signals:
(1) Pt100 platinum resistor;
(2) DC 4-20mA current;
(3) RS232 and RS485 communication interfaces.
2. Equipped with 4 sets of switches, the switches can be set to the full range and are respectively used for controlling the transformer cooling system, over temperature alarm, over temperature trip, etc.
3. Provide two installation sizes: In order to meet the needs of different users, this machine offers two installation sizes for users to choose from.

Main technical data
（1） Main technical indicators of 804 type thermostat
1. Normal working conditions: -30 to+55 ℃
2. Temperature measurement range: 0-100 ℃ 0-120 ℃ 0-150 ℃
3. Indicator accuracy: Level 1.5
4. Control performance:
(1) Setting range: adjustable across the entire range
(2) Setting accuracy: ± 3 ℃
(3) Switch difference: 6 ± 2 ℃
(4) Rated power: AC220V/3A
(5) Standard set point:
0-100℃：K1=55℃ K2=65℃ K3=80℃ K4=90℃
0-120℃：K1=55℃ K2=65℃ K3=80℃ K4=100℃
0-150℃：K1=55℃ K2=65℃ K3=80℃ K4=130℃
5. Output performance: (1) Pt100 platinum resistor;
（2） DC 4-20mA current.
6. Protection level: IP55