Debugging method and wiring of German EMG electric valve
Time: April 24, 2019 18:34:22 Source: Yonglong Valve Reading: zero second
Debugging method and wiring of German EMG electric valve
German EMG is an earlier professional manufacturer of electric actuators in Germany and Europe. In the pipeline where liquid, gas or powder media flow, different types of valves are required to cut off or control the flow of media. Emg electric actuators have decades of successful experience in remote diagnosis and control of valves (whether globe valve, gate valve, plug valve, ball valve, butterfly valve or damper) worldwide. Emg electric actuators are used in various fields, including electric power, water plants, sewage treatment plants, petrochemical industry, metallurgy, paper making, shipbuilding, food, municipal, nuclear power and so on.
The main characteristics of German EMG electric actuator in terms of performance, design and use are as follows:
1. The German EMG electric actuator adopts a unique planetary gear design, which has the smallest gear mesh clearance and long service life, and requires no lubricant for permanent lubrication.
2. The external box of German EMG electric actuator is made of special aluminum alloy, which is light in weight, high in strength and excellent in anti-corrosion performance. The screws used outside are made of stainless steel. The boxes of other companies are made of cast iron, which has poor anti-corrosion performance.
3. German EMG actuators are generally supplied with IP67 protection grade, and IP68 actuators can also be provided at the request of customers.
4. With space heater function, it is powered by internal power supply, and can adjust itself according to the ambient temperature to avoid the failure of electronic devices caused by condensation of humid air.
5. While supplying power to German EMG motor, its internal regulated power supply can provide 24VDC power supply, so German EMG can supply 24VDC externally or internally.
6. It has a good and effective anti motor coasting function. In order to improve the reliability of electric actuators, all German EMG Matic electric actuators have no mechanical braking structure. However, in order to overcome the inertial coasting of the system, the control circuit of the electric actuator motor has an electronic braking function, and the planetary gear transmission mechanism has good self-locking characteristics, This can effectively prevent the inertia coasting of the actuator. The products of other companies mostly use mechanical holding brake braking, which causes heavy mechanical wear, high failure rate and heavy maintenance.
7. In order to ensure the long service life of the integrated electronic control circuit and the accurate adjustment function, the German EMG actuator selects non-contact solid state relay (ELR) instead of mechanical contactor.
8. German EMG actuators, multi turn, angular travel and direct push actuators are equipped with the same gear structure, and have 25 years of patents and application experience. Because this structure has many teeth engagement parts, it has an extremely long working life with almost no maintenance. Worm gear structures produced by other companies always have only one tooth engagement transmission, If a tooth is broken, it will not work at all. Different types of actuators of other companies use different gear structures, and the torque range of angular travel actuators is greatly limited.
9. When using the hand wheel for manual operation, the hand wheel is always engaged without any switching device (hand wheel torque sensor without clutch). Even if the valve at the terminal position or the valve is stuck, the hand wheel can be used normally, reducing wear parts. Other products must first go through the motor to manually clutch, There will be many worn and easily damaged clutch devices.
Commissioning method and wiring of EMG electric valve:
1. First, delete the previously set limit as follows:
Press the Learn (LT) button first, and then move the S1 toggle switch to the Learn position. After about ten seconds, the local indicator lights (on and off) began to flash. This indicates that the debugging state is entered before execution. After about 20 seconds, the two indicator lights go out, which indicates that the previously set limit is being deleted. After about 35 seconds, you can release the Learn (LT) button, and the two indicator lights will flash again. At this time, the previous settings have been deleted, and the actuator has entered the Learn state.
2. The method for setting stroke on/off is as follows:
A， Set the closing limit: turn S2 to CLOSE, and the actuator will be electrically turned to the fully closed position. (Note: the actuator can stop it at any time by turning S2 to the STOP position) Then, turn the S2 button back to the STOP position, press the Learn function key, and turn S2 to the CLOSE position again. At this time, CLOSE changes from flashing to constant light. It indicates that the closing limit travel has been set.
B， Set the opening limit: turn S2 to OPEN, and the actuator is electrically driven to the fully closed position. (Note: the actuator can stop it at any time by turning S2 to the STOP position) Then, turn the S2 button back to the STOP position, while pressing the Learn function key, turn S2 to the OPEN position again, at this time, OPEN changes from flashing to normally on. It indicates that the opening limit travel has been set.
Note: 1) When the actuator leaves the set terminal position, the switch indicator will flash again. Only two terminal positions have been set and the Learn status has exited. The indicator light can indicate normally at the two terminal positions.
2) When setting a terminal travel limit, when the fault alarm light (red light) is on for a long time, it indicates that the mechanical limit limit or actuator torque range has been exceeded. At this time, the actuator will call back until the fault light goes out.
3) When a limit setting needs to be changed after the two terminal positions of the actuator are set, the above debugging method can be used to reset a limit that needs to be changed, without setting two limits at the same time.
4) Before commissioning, set S1.4 and S1.5 to OFF and S2.7 to ON.
3. Torque setting method is as follows:
If the alarm light (red light) is on for a long time during commissioning, if the baffle is not stuck inside, the torque should be increased (note: the maximum value should not exceed 95%). It can be adjusted by R9 and R10 in the combined sensor. R9 represents the closing torque value and R10 represents the opening torque value.
4. The actuator opening and closing indication is opposite to the actual opening and closing of the baffle. The method is as follows:
Open the local operation cover of the actuator and turn S3.8 to ON. However, if there is a red light alarm at this time, you can continue debugging. When you enter the debugging state, the alarm will disappear. The above method can be used for debugging.
5. The actuator terminals are as follows:
1) Switch type: On command: 4, 20, Off command: 3, 20, On feedback: 5, 9, Off feedback: 5, 7,
Fault: 5, 10, 1, 21 are short circuited.
2) Regulating type: command: 22, 24, valve position feedback: 23, 24, open feedback: 5, 9, close feedback: 5, 7, fault: 5, 10, 1, 21 short circuit, 2, 20 short circuit.
3) The open and close feedback of this terminal indicates that the three common terminals in the fault are connected to 5. Remember not to connect the three positive terminals together.
Note: The adjustment type commissioning method is the same as the switch type commissioning method.
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