1. Widely applicable. For various occasions, such as domestic water supply, fire sprinkler pressurization, air conditioning cooling circulation, industrial control pumps, sewage discharge, etc., there are corresponding model specifications. Control motor power range: 0.18~280KW.

2. Excellent quality. Carefully selected international and domestic renowned electrical components and high-quality standard cabinets, meticulously designed and crafted.

3. Fully functional. From one control one to one control four, the main and backup pumps can be freely selected and combined, with multiple starting methods, various control types, fault prevention and switching, and can also be specially designed for you.

4. Satisfied with the service. Provide pre-sales consultation and timely after-sales service at any time, so that you have no worries.

Number characteristic characters:

1. Single control 2, one control two 3, one control three 4, one control four

I、 One use, one backup II, two use, one backup III, three use, one backup IIII, two use, two backup

Characteristic words for starting mode:

Not specified as direct start; Y: Y - △ voltage reduction starting; Z: Self coupling voltage reduction starting; R: Soft start.

Type characteristic characters:

Not specified as liquid level control; P: Pressure control; S: Time control; L: Special for submersible sewage pumps; X: Dedicated for firefighting purposes.

Characteristic words for switching between main and backup pumps:

Not specifying the ordinary type, that is, manually select the main and backup pumps before starting up. When the main pump fails and stops, the backup pump will automatically start and put into operation.

AS: timed automatic switching/manual switching; AC alternates between automatic and manual switching.

(Multiple control modes of operation)

One control two: Control two water pumps, one and two. The first and second pumps are running simultaneously. When starting, the first pump starts working and the second pump is automatically started through a time relay.

One control three: Console 1, 2, and 3 water pumps. The working mode is the same as above.

One for use and one for backup: Control two water pumps, No.1 and No.2. It can work in two ways: "1 main, 2 backup" or "2 main, 1 backup".

Two in use and one backup: Control three water pumps, namely No.1, No.2, and No.3. It can work in three ways: "Number 1, Number 2 main, Number 3 backup" or "Number 2, Number 3 main, Number 1 backup" or "Number 1, Number 3 main, Number 2 backup".

Three in use and one backup: Control four water pumps, namely No.1, No.2, No.3, and No.4. It can work in four ways: "Number 1, Number 2, Number 3 main, Number 4 backup" or "Number 2, Number 3, Number 4 main, Number 1 backup" or "Number 1, Number 3, Number 4 main, Number 2 backup" or "Number 1, Number 2, Number 4 main, Number 3 backup".

The above modes all have manual functions, and in manual mode, each pump can work independently.

Switching mode between main and backup pumps for multi pump control:

Not specified as a regular type, use a manual switch to select the main pump and backup pump before starting up. After the main pump fails, the backup pump will automatically start. Generally, this method is used for controlling the main and backup pumps.

AS: timed automatic switching/manual switching

Suitable for situations where the main and backup pumps need to be used alternately at regular intervals, so that the long-term continuous working time is evenly distributed between the main and backup pumps. The regular switching time is 8-12 hours, which is a selective type. When there is no need for timed automatic switching, the switch can be switched to manual switching mode to select the main and backup pumps. This model has a backup pump self switching function.

AC: Alternating automatic switching/manual switching

The selection of main and backup pumps for the K series electrical control cabinet requires alternating working environments. Every time it is started, the main and backup pumps are exchanged. When there is no need to alternate, the switch can also be switched to manual mode to select the main and backup pumps. This model has a backup pump self switching function.

Not specified as liquid control. By using the high-performance Key float switch produced with Italian technology, this model can reliably achieve changes in liquid level and automatically control the start and stop of water supply and drainage pumps. Other liquid level controllers such as OMRON can also be reasonably equipped according to user requirements.

P-type: Pressure controlled type. By using an external electric pressure gauge or pressure controller, it is possible to automatically turn on and off the pump in response to changes in network pressure. Large scale application in domestic water supply and fire pressure boosting systems. As this box is also suitable for controlling water pumps with Key float switches and remote control with limit switch buttons, it is a "universal interface" motor control box with a wide range of applications.

S-type: Time controlled type. This control box does not have a time setting button or display, and users can control the opening and closing of the water pump according to their timing needs. Suitable for controlling various timed and regular intermittent working modes.

X-type: Fire specific type. This type is designed according to the National Fire Protection Center, and the start of the fire sprinkler pump can be achieved by

① Manual operation of chassis panel;

② Each fire hydrant button or pressure switch is activated;

③ The DG24V of the fire control center is activated, and there is a signal contact for the pump to stop and start in the fire control center as an indication.

L-type: Special type for submersible sewage pumps. According to the characteristics of submersible pumps, in addition to main circuit short circuit, short phase, and overload protection, large pumps also have pump body leakage protection, motor overheating protection, and leakage protection functions.

Determination of starting method:

Generally, water pumps with motor power below 15KW are started directly.

Z: Sewage pumps above 15KW are generally started using self coupling pressure reduction, and fire and sprinkler pumps can also be started using this method.

Y: If there are no special requirements for other models of water pumps above 15KW, they are generally started using the Y - △ pressure reduction starting method.

R: If you want to further reduce the impact on the power supply and motor during starting, extend the mechanical life, completely eliminate water hammer and noise, and achieve energy saving, you can use soft starting method. Our YJK control cabinet is equipped with imported high-quality soft starters, which have superior performance and high reliability.

About Soft Start: Control Principle

The soft start control device utilizes advanced microprocessing to control high-power thyristor components, achieving functions such as software start, soft stop, and power saving for AC induction motors. Soft start refers to the process in which the output voltage of a device increases in a regular manner, causing the controlled motor voltage to rise from zero to full voltage, and the corresponding speed smoothly accelerates from zero to the rated speed. Soft stop refers to the process in which the output voltage of the device decreases according to a certain requirement, causing the controlled motor voltage to drop from full voltage to zero, and the speed to smoothly decelerate from the rated speed to zero accordingly. Energy saving operation refers to the automatic adjustment of the output voltage of the device based on the load situation to improve the power factor of the motor during light load operation, in order to achieve the goal of energy saving. Soft start can make the starting and stopping torque curves of the water pump approach the pump torque characteristic curve, minimizing the electrical and mechanical starting impact of the pump and system, making the starting extremely reliable.

Performance and characteristics of soft start

1. Slope voltage starting and constant current soft starting are optional

Limit the voltage drop during startup and reduce the peak current.

Limit the starting torque to protect the transmission machinery.

Smooth acceleration, deceleration, or braking to protect equipment and personnel.

Mechanical protection for transmission machinery can eliminate torque surges and reduce surge currents.

2. Each starting parameter can be easily adjusted

The starting current, voltage, and time can be flexibly adjusted according to different loads to achieve the minimum current surge.

3. Extend the lifespan of motors and water pumps

Soft start provides a smooth and gradual starting process for the motor, reducing equipment vibration and noise.

Eliminating the surge current during startup. Reduce motor losses.

4. Efficient and energy-saving

When the motor is under light load, the soft starter can reduce the terminal voltage, improve the motor power factor, and achieve energy-saving under light load.

5. Soft parking function

The soft parking function can prevent the water pump from experiencing the "water hammer" effect.

6. Easy to operate, stable to run, and reliable

Automated control can be put into safe and continuous operation without maintenance after the system is debugged and running normally.

7. Complete protection function

It has multiple protections such as overcurrent, overvoltage, overload, phase loss, short circuit, overheating, etc.

8. It can be connected to a computer through a serial port to achieve direct monitoring of computer networking.

About Intelligent Control

Microcomputer intelligent control is developed by our company's technical personnel to meet market requirements, based on the variable frequency speed control cabinet. Adopting PLC programmable controller to provide human-machine interface for pump units and other equipment, supplemented by computer technology for intelligent control. It has functions such as automatic, manual, remote operation, and computer control. Advanced control methods, reliable electrical performance, convenient networking, and significantly reduced operating costs, with more obvious energy-saving effects, make it a new type of modern intelligent control product with high quality and low cost.

By using a PLC programmable controller, the motor pump and related equipment can be automatically controlled, which can perform regular automatic inspections of the fire pump, solve the problem of fire pump biting, frequency conversion pump cutting, eliminate water hammer effects, alarm and fire control center linkage control, and many other functions.

The main method is to use Mitsubishi PLC's dedicated monitoring software, which eliminates the trouble of bus connection and computer networking through RS-232/RS-485 and wireless connectors. Operators only need to operate the computer in the control center to obtain the working conditions and various technical parameters of outdoor pump units and other equipment, and can automatically make correction control according to real-time needs, making it possible for the computer room to be unmanned and achieving the purpose of human-machine interface.