WHD72 Series 72*72 Panel Size Temperature&Humidity Monitoring Device
OVERVIEW
The controller for temperature and humidity is suitable for adjustment and control of temperature and humidity in equipments of high voltage switchgear, terminal box, ring network panel, box transformer substation etc. It can effectively protect relevant equipment from faults resulting from excessive low or high temperature, creepage or flashover etc.from humidity or condensation.
MAIN PARAMETERS
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Technical parameter |
Value |
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Measuring range |
Temperature |
-40.0℃～99.9℃ |
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Humidity |
0%RH～99%RH |
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Precision |
Temperature |
±1℃ |
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Humidity |
±5%RH |
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Transmitting output |
DC 4～20mA或DC 0～20mA |
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Set range of controlling parameter |
Heating for Temperature rising |
-40.0℃～40.0℃ |
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Blowing for temperature decreasing |
0.0℃～99.9℃ |
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Humidity control |
20%RH～90%RH |
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output contact capacity |
5A/AC250V |
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Start/stop gap |
5 |
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Communication port |
RS485,MODBUS(RTU) |
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Auxiliary power |
Voltage |
AC 85～265V DC 100～350V |
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Consumption |
Basic power consumption(≤0.8w)； relay power consumption(each channel≤0.7w) |
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Insulation resistance |
≥100MΩ |
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power-frequency withstand voltage |
power with shell,touchable metal parts/ power with other terminal group 2kV/1min(AC,RMS) |
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average work time without stoppage |
≥50000h |
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Working condition (controller) |
Temperature |
-20℃～+60℃ |
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Humidity |
≤95%RH，without condensation and corrosive gas |
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Altitude |
≤2500 m |
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Start/stop gap: In the control process,for the execution part (heater or fan) , the difference between starting temperature( humidity) and stopping temperature (humidity).
WHD72 Type with auxiliary function:fault alarm"-J",signal communication"-C",transmission"-M"
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Type |
Function |
Sensor（Pcs） |
Mounting mode |
Outline,size |
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WHD72-11 |
One channel temperature, humidity control |
WH-3(1 pc) |
Embedded Cut out：67x67 |
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WHD72-22 |
Two channel temperature, humidity control |
WH-3(2pcs) |
OPERATIONAL PRINCIPLE
The controller for temperature and humidity mainly consists of three parts of transmitter, controller, heater(or fan etc.), its operational principle is shown as following:
The message of temperature and humidity in the box is detected by the sensor and analyzed by the controller: When environmental temperature, humidity is up to the presetting value or exceed the presetting value, the controller is giving related signal to contects of relay, then the heater(or fan) is energized and working to heat of dehumidifying; after environmental temperature,humidity is well below the presetting value,the heater(or fan) is deednergized and stop working. In addition to its basic functions, the specific product with different type possess secondary functions such as alarming output for wire-breaking,communication,forced heating etc.
DIMENSION
DIMENSION
WIRING DIAGRAM
