Constant temperature and humidity control cabinet
Description:
Constant temperature and humidity control cabinet widely used in workshop, exhibition, archives, laboratory, network station.
Our control system for constant temperature and humidity can save much energy,reduced the working time of compressor, extend the working time of facilities. PLC is the key unit in our system,it has good stable, Strong anti-interference ability.The system fixed warm humidity transmitter as digital transmission.long transmission distance, free of electrostatic interference. Control precision.
System hardware structure:
The core of system is Siemens PLC, touch screen as human-computer interface. the temperature and humility transfer by sensor, It is processed into digital signal by single chip, via RS485 wire transfer to PLC, and data processing, and controlled via PID. Keep constant temperature and humility controlling compressor, humidificatin valve,fan valve.
The procedure of control for constant temperature and humid:
There are 5 method from PLC controlling.
1. monitor status. The system only reads the temperature and humidity of the environment,without controlling.
2. Hand control status.when compressor forced operation need hand control.You can touch compressor 1, compressor 2 for start.
3. Automatic humidification, When start this method, the system will work according fixed upperlimit & lowerlimit.
4. Automatic temperature control. When start this method, the system will work according fixed upperlimit & lowerlimit. At the same time, monitor the outdoor temperature is less than 14
5. Circulation working: combination method 3 & method 4. Temperature controlling then humidification controlling.
ABB inverter is a famous brand which researched & produced from ABB group. That used in control & regulate three-phase AC asynchronous motor. It has played important role in the marketing for its stable performance, rich combination , good vector control technology,Low-speed, high torque output, dynamic characteristic and super overload capacity.
Operation principle:
Rectified and filtered AC 380V to DC510V with inverter, and change DC510 to AC with voltage and frequency adjustable use converter. Voltage: 0~380V, frequency: 0~600HZ. So that can control motor speed stepless.
Products Features:
1ã??According customer requirements, ABB inverter is the core of our products. The design & manufacture has distinctive characteristics.
2ã??Each procedure for control box is strictly controlled, such as purchase, producing, inspection, shipping. Every step conform to 3C certificate.
Before production, we will prepare Electrical principle diagram and choose the suitable components brand for assembly according customerâ??s requirements, such as working conditional (temperature, humidity, radiation, proof degree of explosion), motor parameter (original, rated current, rated voltage, phases, loadtype, starting system), control method (manual function or automatic function), local control or remote control.
We also prepared some precaution for some potentially interference, such as, reactor, isolation transformer, shielded cable, install lighting protection.
Finished electrical principle diagram, we must consider cabinet design, cabinet material, protection degree, fix cooling fan, electric wiring, components installtion, ambient temperature, ambient humidity.
APPLICATIONS:
1. No.1 block, No.2 block. Hazardous gas atmosphere.
2. IIA, IIB, IIC, T1~T6 explosion gas, steam atmosphere.
3. Indoor & ourtdoor IP54.
4. NO.20, 21, 22 district. Flammable dust atmophere.
5. T1-T16 atmophere.
6. Explosive and hazardous environment, such as petrochemical, chemical, wine-making, medical, painting, fabric, printing & dyeing, defense industry.
Parameter:
1. Explosion-proof symbol: ExdellBT4Gb, ExdellCT4Gb, ExdIIBT4 Gb/ExtDA21 IP55 T135â??, ExdIICT4 Gb/ExtDA21 IP55 T135â??.
2. Protection Level: IP54.
3. Power supply line: AC220V/380V 50HZ. Three-phase five wire system.
4. Total current of switch: 16A ~ 1250A
5. Branch current: 6A ~ 1000A
6. Shell material: Q235 Carbon steel.
7. Aluminum alloy casting shell. Electrostatic powder coating on carbon steel.
8. Inlet: G3/4â?? â?? G4â??
9. Outlet: G1/2â?? â?? G4â??
10. Cable entry: Aluminum cable sealing.
11. Installation: Movable type, floor type, wall type, frame type. Collocation according customer or shell design.
Products Features:
1. Can loaded dual power source, breaker, AC contactor, thermal relay, inverter, soft-starter, Surge protective device, transformer, small relay, time relay, pulse control apparatus, emergency power supply, electricity instruments, intelligent instruments, PLC, touch screen, current transformer, remote receiver, KBO etc.
2. With protection for short circuit, overload, lack-phase, leakage, disconnection of the breaker.
3. Need waterproof cover fixed outdoor.
4. Electric line completely in shell, only prepare outlet wire connected teminal blocks.
5. Steel pipe or cable can available.
Description:
It is used in frequency regulation, reduce energy consumption. Start the equipment smoothly, Reduce the damage of current to motor when starting.
Applicatons:
Widely used in intelligent controlling for Constant-pressure Water Supplying System, compressor, Fan and water pump, Central Air-Conditioning System, Port Machinery, machinary tool, boiler, paper machine, food machinery.
Advantage:
1. Energy saving.
2. Saving cost.
3. Improve the accuracy of pressure control.
4. Prolong the service life of motor.
5. The noise of the motor is reduced.
Applicatons:
It is made from SUS304 with double door. Fixed Simens 7 touch screen in the panel with characteristics of High-integration, Visual display, easy operation, stable etc. Easy for control of water-preserve.
Monitor the water level of tank from system. Control the water-supply pump, sewage pump, chemical feed pump, filter washing, also can make up water automatically when water shortage.
Components:
Schneider Circuit Breakers, Schneider AC contator, Simens CPU, comprehensive pump protection.Simens 7â??touch screen.buzzer, Omron intermediate relay.
Ambient: below attitude 2000m, temperature -20â??--+50â??. Relative humidity below 95%, avoide from vibration source 10-55HZ, Avoid corrosive and flammable gases.
Protective grade: IP35, IP33.
XM illumination power cabinet suit for power controlling for AC 50HZ, voltage 380V, current 630A. Widely used in mine industries lighting systems, hospital, factory, esident area, large building, public lighting system, mall, workshopp for centralized control.
Lightning power distribution cabinet: indoor wall hanging type, outdoor water-proof type.
The switch off power cabinet use MCCB rated current 16A~630A. Subcircuit use MCB rated current 1A ~ 125A.ELCB. Also we can add disconnecting switch, metering transformer, watt-hour meter, indicator, ammter, voltmeter,surge protective device. Indoor wall hanging cabinett protection IP40, Outdoor water-proof type protection IP54. Production meet national standard IEC & GB7251.3
