Temperature and humidity controller for terminal box

Description :

　　WH series temperature and humidity controller

　　1 Overview

　　The temperature and humidity controller products are mainly used for regulating and controlling the internal temperature and humidity of medium and high voltage switchgear, terminal boxes, ring main units, box transformers and other equipment. It can effectively prevent equipment failures caused by low and high temperatures, as well as creepage and flashover accidents caused by moisture or condensation. The products are divided into WH ordinary series and WHD intelligent series.

　　The ordinary temperature and humidity controller is made of imported polymer temperature and humidity sensors, combined with stable analog circuits and switch power supply technology. The working status of relay action, heater failure power supply, etc. are all indicated by LED, which is clear to the user. The product is stable and reliable, and can work in harsh environments such as strong electromagnetic fields for a long time.

　　The intelligent temperature and humidity controller displays temperature and humidity values in digital form, with heater, sensor fault indication, transmission function, and RS485 communication interface for remote monitoring. Users can program system parameters by pressing buttons. This instrument integrates measurement, display, control, and communication, with high accuracy and wide measurement range. It is a temperature and humidity measurement and control instrument suitable for various industries and fields.

　　2Product Introduction

　　2.1 WH series ordinary temperature and humidity controller

　　2.1.1 Model Description

　　Note 1: "Combination external connection" refers to placing sensors in the same housing and collecting temperature and humidity information from the same point when both temperature and humidity control are available simultaneously.

　　2.1.2 Technical indicators

　　Technical parameter indicators

　　Type: Start when heating up ≤ 5 ℃, stop when heating up ≥ 13 ℃

　　Start when the blast cooling is ≥ 40 ℃ and stop when it is ≤ 35 ℃

　　Heating and dehumidification ≥ 85% start, ≤ 77% stop

　　Precision Temperature: ± 3 ℃ Humidity: ± 5% RH

　　Contact capacity 5A/AC250V (passive contact)

　　Power supply AC 85~265V DC 100~350V, power consumption ≤ 3VA

　　Insulation resistance ≥ 100M Ω

　　Industrial frequency withstand voltage power supply and shell accessible metal parts/power supply and other terminal groups 2kV/1min (AC, RMS)

　　Mean time between failures ≥ 50000 hours

　　Working environment temperature -10 ℃~+55 ℃

　　Humidity ≤ 95% RH, no condensation, no corrosive gas

　　Altitude ≤ 2500 meters

　　Note: The control parameters are not adjustable, but can be specified by the user.

　　2.1.3 Product specifications

　　WH ordinary temperature and humidity controller

　　project

　　Model Basic Functions Sensors/Quantity Optional Functions

　　WH □ -01/H1 heating and temperature rise W-1/103 type: with one circuit disconnection alarm indication function;

　　Type 46: equipped with two-way disconnection alarm indication and fault alarm output function;

　　WH □ -01/F1 route blower cooling W-1/1

　　WH □ -10/H1 heating and dehumidification H-1/1

　　WH □ -02/H2 detection, 1 heating and temperature rise W-1/2

　　WH □ -02/F2 channel detection, 1-channel blower cooling W-1/2

　　WH □ -20/H2 detection, 1-channel heating and dehumidification H-1/2

　　WH □ -11/HH1 heating and heating, 1 heating and dehumidification WH-1/1

　　WH □ -11/HF1 heating and dehumidification, 1 blowing and cooling WH-1/1

　　WH □ -02/HH2 heating circuit temperature rise W-1/2

　　WH □ -02/HF1 heating and heating, 1 blowing and cooling W-1/2

　　WH □ -20/HH2 heating and dehumidification H-1/2

　　Note: 1. "□" refers to 03 type, 48 type, and 46 type temperature and humidity controllers;

　　2. After selecting the controller model, the heater or fan is not included and must be purchased separately;

　　3. The connecting wires between the controller and the sensor can be ordinary wires, and the length should not exceed 20 meters.

　　2.1.4 Appearance and Dimensions (Unit: mm)

　　WH03 ordinary temperature and humidity controller

　　WH48 ordinary temperature and humidity controller

　　WH46 ordinary temperature and humidity controller

　　2.1.5 Wiring terminals

　　● WH03 ordinary temperature and humidity controller ● WH48 ordinary temperature and humidity controller

　　WH46 ordinary temperature and humidity controller

　　Note: Terminals 3 and 4 are the output terminals of the relay.

　　2.2 WHD series intelligent temperature and humidity controller

　　2.2.1 Model Description

　　2.2.2 Technical indicators

　　Technical parameter indicators

　　Measurement range: Temperature: -40.0 ℃~+99.9 ℃ Humidity: 20% RH~90% RH

　　Precision Temperature: ± 1 ℃ Humidity: ± 5% RH

　　Transmission output DC4-20mA or DC0-20mA

　　Control parameter setting range: Heating and warming up -40.0 ℃~+40.0 ℃

　　Blast cooling 0.0 ℃~+100.0 ℃

　　Heating and dehumidification 20% RH~90% RH

　　Output contact capacity 5A/AC250V (passive contact)

　　Communication RS485, Modbus RTU protocol

　　Industrial frequency withstand voltage power supply and shell accessible metal parts/power supply and other terminal groups 2kV/1min (AC, RMS)

　　Insulation resistance ≥ 100M Ω

　　Power supply voltage AC 85~265V DC 100~350V

　　Basic power consumption (≤ 0.8VA)+relay power consumption (≤ 0.7VA per channel)

　　Mean time between failures ≥ 50000 hours

　　Working environment temperature -10 ℃~+55 ℃

　　Humidity ≤ 95% RH, no condensation, no corrosive gas

　　Altitude ≤ 2500 meters

　　2.2.3 Product Specifications

　　project

　　Model Basic Functions Sensors/Quantity Optional Functions (Choose One from Three) Remarks

　　WHD48-111 Road Temperature and Humidity Control WH-2/11. Fault Alarm

　　2. Transmission output

　　3. RS485 communication

　　48 appearance with no optional functions

　　WHD72-11

　　WHD90R-11

　　WHD96-11

　　WHD46-11

　　WHD96-222 Road Temperature and Humidity Control WH-2/2

　　WHD46-22

　　WHD46-333 Road Temperature and Humidity Control WH-2/3

　　Note: 1. Each sensor corresponds to two sets of control output contacts (passive), which are respectively connected to the heater and fan;

　　Heaters are used for heating or dehumidification, while fans are used for cooling;

　　2. The length of the connecting wire between the sensor and the controller shall not exceed 20 meters.

　　2.2.4 Appearance and Dimensions (Unit: mm)

　　WHD48/72/96 temperature and humidity controller

　　Model Frame Size (mm) Shell Size (mm) Hole Size (mm)

　　W1H1W2H2DW3H3

　　WHD 48484843.843.88444.544.5

　　WHD 727575666697.56767

　　WHD 9696968686858888

　　WHD46 Temperature and Humidity Controller

　　WHD90R Temperature and Humidity Controller

　　2.2.5 Wiring terminals

　　WHD46 Temperature and Humidity Controller

　　Note 1: Instrument terminals 30, 31, and 32 are optional function output terminals: choose one of fault alarm, communication, or transmission output.

　　WHD48/72/90R temperature and humidity controller

　　Note 1: Instrument terminals 30, 31, and 32 are optional function output terminals: one of fault alarm, communication, and transmission output, except for WHD48.

　　WHD96 Temperature and Humidity Controller

　　Note 1: Instrument terminals 30, 31, and 32 are optional function output terminals: one of fault alarm, communication, and transmission output.

　　3. Sensors

　　3.1 Overview

　　The sensors of the WH series ordinary temperature and humidity controller and the WHD intelligent temperature and humidity controller both use external connections. The sensor part adopts a dedicated housing with good ventilation and exquisite appearance, which can effectively protect internal components, improve service life, and facilitate installation and wiring.

　　3.2 Model Description

　　3.2.1 WH series ordinary temperature and humidity controller sensor

　　Model, Function, Wiring Installation

　　Method, external dimensions

　　W-11 channel temperature

　　sensor

　　DIN35

　　guide rail

　　H-11 channel humidity

　　sensor

　　WH-11 temperature+1 humidity sensor

　　3.2.2 WHD series intelligent temperature and humidity controller sensor

　　Model, Function, Wiring Installation

　　Method, external dimensions

　　WH-21 channel temperature, 1 channel humidity

　　DIN35

　　guide rail

　　4. Heater

　　4.1 Overview

　　The ALW series heater is made of specialized aluminum alloy heat dissipation plate profiles and nickel chromium alloy electric heating wires, which have the advantages of small size, beautiful appearance, uniform heat dissipation, fast heat conduction, large heat dissipation area, and long service life. The product complies with GB/T15470-1995.

　　4.2 Technical indicators

　　Technical parameter indicators

　　Working voltage AC220V AC110V

　　Rated power 50-300W (can also be specially ordered)

　　Service life ≥ 50000 hours

　　Insulation resistance ≥ 100M Ω

　　Withstand voltage 2000V

　　4.3 Product specifications

　　Variety installation instructions, model, external dimensions (mm)

　　Aluminum alloy material single bracket installation

　　Hole spacing: 55mmALW-50W

　　ALW-75W

　　ALW-100W

　　ALW-150W

　　ALW-200W

　　ALW-250W

　　4.4 Selection Suggestions

　　Aluminum alloy material has a large heat dissipation area and high efficiency, suitable for fully automatic control of heating or dehumidification. The recommended selection is as follows:

　　Large environmental space (m3) heater power (for reference only)

　　≤0.550W-75W

　　0.5-1100W-150W

　　1-1.5200W

　　1.5-2250W

　　Above 2300W

AfterSalesService :

• Temperature and humidity controller for terminal box