product overview
The HDLH-R series intelligent soft start control cabinet is composed of SMC intelligent soft starter (contactless fixed controller), PLC programmable, introduced low-voltage electrical appliances and other sensing devices. It is an efficient, energy-saving, economical, reliable, and easy to maintain automatic water supply device based on power frequency for intelligent control of water pump motors.
The core of the HDLH-R series intelligent soft start water supply control cabinet is the SMC intelligent soft starter, which is a new technology combining a microprocessor and a high-power thyristor module. It is a new concept product used for motor starting and can provide stepless acceleration from zero to rated speed for three-phase AC induction motors, achieving functions such as soft start and energy saving. When starting, the soft starter adjusts the output voltage according to the set starting time, so that the controlled motor stator voltage slowly rises to full voltage, and its speed smoothly accelerates from zero to the rated speed. Energy saving operation refers to the automatic adjustment of the SMC based on the load condition when the motor is unloaded or lightly loaded, improving the power factor of the motor to achieve energy saving. It can fully adopt traditional starting methods such as star delta voltage reduction starting and autotransformer voltage reduction starting.
Excellent performance. It can meet the water supply requirements of users well and can be widely used in industrial and civilian control fields.

Product Features
1. Select international brand soft starters, programmable controllers, low-voltage electrical appliances, and sensing devices;
2. Excellent performance, flexible control mode, strong anti-interference ability, stable and reliable operation;
3. The circuit design is concise, clear, and easy to analyze and repair faults;
4. During the start-up process, the speed of the water pump motor is adjusted without loss, which can achieve smooth acceleration from zero to the rated speed;
5. In automatic mode, the water pump motor is started by a soft starter, which has no impact on the power grid and pipeline network, greatly extending the water pump and electricity supply
The electrical and other service life of control equipment for machinery and pipeline systems;
6. It has multiple fault displays and backup records, as well as comprehensive information on long-term voltage, overvoltage, overcurrent, overload, and short circuit. Lack of phase, water shortage
Automatic protection shutdown and other protective functions, safe to use, and easy to maintain;
7. The starting process is continuous, with no contact switching, and multiple motors can be started alternately;
8. Programmable control: Multiple control methods can be implemented according to user needs, such as liquid level control, pressure control, temperature control, and time control
Room control, air conditioning water pump circulation control, submersible pump control, fire control, etc.

Functional principle and purpose
1、 Control mode
1. One in use and one backup: Control two water pumps, 1 # and 2 #. When in automatic mode, they can work in either "1 # main and 2 # backup" or "2 # main and 1 # backup" states. When the main pump fails, the backup pump will automatically start working. When starting manually, use the panel operation button to control it. If the user requests to add a dual-purpose mode (i.e. two pumps can be used simultaneously), please provide detailed instructions when placing an order.
2. Two in use and one backup: Control three water pumps, namely 1 #, 2 #, and 3 #, which can operate in three states: "1 #, 2 # main and 3 # backup", "2 #, 3 # main and 1 # backup", or "1 #, 3 # main and 2 # backup". When the main pump fails, the standby pump will automatically start working. When starting manually, use the panel operation button to control it. If one main pump is turned off, it will become "one in use and one backup". If the user requests to add a "three in use" working mode (three pumps can be used simultaneously), please provide detailed instructions for ordering;
3. Three in use and one backup: Control four water pumps 1 #, 2 #, 3 #, and 4 #, which can work in four states: "1 #, 2 #, 3 # main and 4 # backup" or "2 #, 3 #, 4 # main and 1 # backup" or "1 #, 2 #, 4 # main and 3 # backup" or "1 #, 3 #, 4 # main and 2 # backup". When the main pump fails, the backup pump will automatically start working. When starting manually, use the panel operation. Button control, if one main pump is turned off, it becomes "dual-use and one backup", and if two main pumps are turned off, it becomes "one in use and one backup". If the user requests to add a "four use" working mode (i.e. simultaneous use of four main pumps), please provide detailed instructions for ordering.
2、 Control method
1. Y "liquid level control: This type of control cabinet is equipped with a key float switch or a high-performance electronic liquid level controller, which can automatically control the start and stop of the water pump according to the level of the liquid;
2 、 P "pressure control: This type of control cabinet is equipped with an external electric contact pressure gauge. The pressure controller is independent of the pressure and can automatically control the start and stop of the water pump according to the high or low pressure of the pipeline network. It is also suitable for control using various methods such as float switches, limit switches, and button remote control. It is a" universal interface "motor control cabinet with a wide range;
3. Temperature control of "T": This type of control cabinet is equipped with a temperature sensor outside, which can be adjusted according to the temperature of the conveyed medium. Automatically control the start and stop of the water pump. Applied to constant temperature, exchange unit systems, etc;
4. S "time control: This type of control cabinet is equipped with a time controller that can automatically control the start and stop of the water pump according to the user's pre-set time sequence, and is used for equipment that requires timed control;
5. The "K" air conditioning joint control "control cabinet is designed for the air conditioning water pump. The start of the water pump is controlled by the operation center. When the water pump is running, the control cabinet outputs a control contact for connecting the refrigeration unit, which realizes the control according to the program of starting the pump first and then starting the refrigeration unit, ensuring the safe operation of the unit;
6. Q "submersible sewage pump control: According to the characteristics of the submersible sewage pump, this type of control cabinet not only has main circuit short circuit, gas phase, and overload protection, but also is designed with pump body leakage protection and pump body motor stator winding overheating protection functions;
7. "X" fire control: The start of the fire sprinkler pump can be manually started through the chassis panel, the fire hydrant switch can be activated, the fire center can be started, and the output of the pump start and stop signals can be fed back to the fire center for indication and alarm purposes.
3、 SMC can only activate the characteristics of the starter
1. Soft starter can solve the problem of system water hammer caused by the impact of internal liquid flow during the start-up of water pump motor, avoiding damage to pipelines, valves and other accessories, and saving maintenance costs;
2. Excessive starting current can cause voltage drop in the power grid, resulting in damage to other load devices in the grid. Soft starters can completely solve this problem by reducing distribution capacity, reducing cable area and electrical component specifications, and lowering the total investment of equipment;
3. When the equipment is unloaded or lightly loaded, the soft starter can automatically adjust the output voltage to reduce the current consumption, improve the power factor of the motor, and achieve the goal of energy saving;
4. The soft starter can automatically adjust to balance the phase current, reduce motor heating, and extend the service life of the motor.