● Two channels temperature & humidity (with sensor)
● Measuring temperature range: -40~+99℃
● Measuring humidity range: 20%RH~90%RH
● Display: LED display
● Optional function: RS485(Modbus-RTU) communication
● Temperature and humidity measuring & controlling
● Panel mounted
General
WHD series smart temperature and humidity controller 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.
Specification
| Technical Parameter | WHD48 | WHD72 | WHD46 | WHD20R | |
|
Measuring range
|
Temperature | -40℃~99.9℃ | |||
| Humidity | 20%RH——90%RH | ||||
|
Accuracy
|
Temperature | ±1℃ | |||
| Humidity | ±5%RH | ||||
|
Set range of controling parameters
|
Heating for temperature rising |
-40℃~40℃ |
|||
| Blowing for temperature decreasing |
0℃~99.9℃ |
||||
| Humidity | 20%RH~90%RH | ||||
|
Optional function
|
Communication | RS485 Modbus-RTU | |||
| Analog output | No | DC4-20mA | No | ||
| Alarm | No | 1 alarm output | |||
| Auxiliary power supply | AC85~265V, DC100~350V | ||||
| Insulation resistance | ≥100MΩ | ||||
Front Panel
Wiring
Dimension
Typical Connection
| Technical Parameter | Value | |
| Measuring range | Temperature | -40.0℃～99.9℃ |
| Humidity | 20%RH～90%RH | |
| Accuracy | Temperature | ±1℃ |
| Humidity | ±5%RH | |
| Analog output | DC 4～20mA | |
| Set range of controlling parameter | Heating for temperature rising | -40.0℃～40.0℃ |
| Blowing for temperature decreasing | 0℃～99.9℃ | |
| Humidity control | 20%RH～90%RH | |
| Contact capacity | 5A/AC250V | |
| Communication | RS485(MODBUS-RTU) | |
| Auxiliary power supply | Working range | AC 85～265V DC 100～350V |
| Consumption |
Basic power consumption(≤0.8w)+
relay power consumption(each channel≤0.7w)
|
|
| Insulation resistance | ≥100MΩ | |
| Environment | Temperature | -20℃～+60℃ |
| Humidity | ≤95%RH(No condensation) | |
| Altitude |
≤2500 m |
|
Q: Connect users between the sensor and the controller, can it be matched? How long is the length in meters?
A: The user can wire, but it is required to use a 4-core shielded wire, and a 2.5-meter shielded wire is attached to the factory. The longest distance between the sesor and the controller is 20 meters.
Q: Can WHD Switch control manually and automatically?
A: Yes, but be sure to explain to the customer service before placing an order, it is an unnormal operation.
Q: User have their own sensor, can they buy a controller?
A: No, the sensor and controller need to be used together, 2 device can not sold seperately.
