HCU Remote

The hydraulic control cabinet HCU Remote is used for remote and local control of valves fitted with hydraulic actuators. The valves can also be operated directly at the cabinet and also without electricity with the hand pump.

At operational changes, or emergencies, it is necessary to quickly close the valves. Therefore there is a need to be able to remotely control valves from control centers. HCU Remote is meant for the most demanding locations where remote control is required. All components are located in a rugged metal enclosure and the electronics to electrical cabinet with high protection class.

Model	Flow rate	Product no.
Hydrox Control Unit (HCU) Remote	1,27 l/min	812100

Function

The HCU Remote contains an electrical hydraulic pump with frequency converter control. The pump is connected by hoses to the valve actuator. The control of the valve is based on the analog signal of the position transmitter. The hydraulic system is controlled with solenoid valves based on the valve position. The default closing time for each actuator size is calculated to give a slow closing to minimize the risk of water hammer in the pipe. The closing time and different operation ramps can be calibrated because of the frequency converter. For control of the hydraulic pump and the solenoid valves, programmable logic is used. The control system can be adapted to current circumstances and requirements.

Remote

The HCU Remote is provided with equipment to be controlled remotely. To transmit signals to and from the control center common transmission methods can be used.

Equipment

The Hydrox product range provides a complete hydraulic control cabinet with the following components:

Compact power pack with a hydraulic pump, oil tank and pressure switch
Electrically operated directional valves and indicators
Electrical cabinet with power module and frequency converter as well as heater to keep the unit free from moisture
Process screen on the door of the electrical cabinet

Local control

Control with buttons: common open, close and stop buttons, valve selection is made on the process screen
Diode indication for position 0-100 % open and end positions in the process screen
Active and old alarms in the process screen
Emergency stop
Local/Remote control switch
Local control overrides remote control for safety

Remote control

Incoming signals: open/close for each valve and common stop
Analog feedback signals for valve position and digital feedback signals for end positions
Process alarm
Equipment alarm

Position indication at the actuator

Hydrox actuator is equipped with position transmitter with analog signal and digital signals for end positions
Position transmitter and HCU remote cabinet are factory calibrated together with valve and actuator
No calibration is needed when installing the cabinet at site