Acrel WHD20R-22 Temperature and Humidity Controller
Acrel WHD20R-22 Temperature and Humidity Controller
General
Acrel 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.
Features
Accuracy
Temperature ±1℃
Auxiliary power supply
AC 85-265V, DC 100-350V
Consumption
Basic power consumption(≤0.8w)
Relay power consumption(each channel≤0.7w)
Installation:
DIN rail 35mm
Dimension(L*W*H)：
88*90*52mm
Frontside of WHD20R-22 Temperature and Humidity Controller
Types of WHD Series Temperature & Humidity Controller
Network
What is Temperature Humidity Controller Working Principle?
The temperature and humidity controller is mainly composed of three parts: sensor, controller, heater (or fan, etc.), and its working principle is shown as followed:
The sensor detects the temperature and humidity information in the box, and transmits it to the controller for analysis and processing: when the temperature and humidity in the box reach or exceed the preset value, the relay contact in the controller is closed, and the heater (or fan) ) to start working when the power is turned on, heating or blowing the inside of the box, etc.; after a period of time, the temperature or humidity in the box is far from the set value, the relay contacts in the controller are disconnected, and the heating or blowing stops. In addition to the basic functions, different models also have auxiliary functions such as disconnection alarm output, transmission output, communication, and forced heating and blasting.
WHD Series Temperature Humidity Controller FAQs
The temperature and humidity controller controls the internal temperature and humidity of the power distribution system equipment. Reduce accidents.
When the temperature and humidity in the distribution box reach the threshold, control the heater (or fan) to work, and perform auxiliary functions such as heating or blowing.
Medium and high voltage switchgear, terminal box, ring network cabinet, box transformer and other equipment.
Through the temperature and humidity sensor.
Benefits of WHD Series Temperature Humidity Controller
• Optional functions: alarm, communication
• Temperature and humidity measuring & controlling
• DIN rail mounted
Acrel WHD20R-22 Temperature and Humidity Controller
Types
Technical Parameters
|
Technical parameter
|
Value
|
|
|
Measuring range
|
Temperature
|
-40.0℃～99.9℃
|
|
Humidity
|
0%RH～99%RH
|
|
| Precision |
Temperature
|
±1℃
|
| Humidity |
±5%RH
|
|
| Transmitting output |
DC 4～20mA or DC 0～20mA
|
|
|
Set range of
controlling parameter
|
Heating for Temperature rising
|
-40.0℃～40.0℃
|
|
Blowing for temperature decreasing
|
0.0℃～99.9℃
|
|
|
Humidity control
|
20%RH～90%RH
|
|
|
Output contact capacity
|
5A/AC250V
|
|
|
Start/stop gap
|
5 | |
|
Communication port
|
RS485,MODBUS(RTU)
|
|
|
Auxiliary power
|
Voltage
|
AC 85～265V
DC 100～350V
|
|
Consumption
|
Basic power consumption(≤0.8w)；
relay power consumption(each channel≤0.7w)
|
|
|
Insulation resistance
|
≥100MΩ
|
|
|
Power-frequency withstand voltage
|
power with shell,touchable metal parts/
power with other terminal group 2kV/1min(AC,RMS)
|
|
|
Average work time without stoppage
|
≥50000h
|
|
|
Working condition
(controller)
|
Temperature
|
-20℃～+60℃
|
|
Humidity
|
≤95%RH，without condensation and corrosive gas
|
|
|
Altitude
|
≤2500 m
|
|
1. Manual for Acrel WHD20R-22 Temperature and Humidity Controller
2. Installation and Use for Acrel WHD20R-22 Temperature and Humidity Controller
3. Debugging Software for Acrel WHD20R-22 Temperature and Humidity Controller
