State selection

When the circuit in a hot standby state, you can select SA1, the switch position of SA2, determine the main circuit is controlled or uncontrolled. When SA1 (SA2) on the left, KM1 (KM2) coil exit; When SA1 (SA2) on the right, KM1 (KM2) of coil in operation. When SA1 (SA2) on the left, the signal light is lit, operating or maintenance personnel can use the block check whether the control circuit is electricity; When SA1 (SA2) on the right, the signal light is not bright, only after the motor start valve, the signal light HL1, HL2 spangle (HL3, HL4).

Open valve

Switch on the power switch QF, would choose SA1 placed in the right, press the SB1 (or SB2), current and in turn after V11 SB1 (or SB2) - KM2 of contact (2, 3) - - for SQ2 - SA1 KM1 coil - KH contact (7-9) - KM3 of contact (9, 10) - SB5 - W11, KM1 coil action and self-locking, valve motor rotation, open the valve. Contact in KM1 (5-6) after connecting, flash switch S1, red light flashing HL1 and green HL2. When the valve is open to the corresponding position, for SQ2 disconnect, KM1 lose electric coil, its main contactor reset, the power is cut off of the valve motor valve motor stop working.

The valve closed

Will select switch SA2 on the right, press SB3 (or SB4), current in turn after the V11 - SB3 (or SB4) - > contact of KM1 (13, 14) - KM2 coil - SQ1 to SA2, KH contact (7-9) - KM3 of contact (9, 10) - SB5 - W11, KM2 coil absorption merger self-locking, motor rotating valve, close the valve. Contact in KM2 (12-15) after connecting, flash switch S2, HL3 a red light and green light flashing HL4. When the valve is closed to the appropriate location, position switch SQ1 disconnect, KM2 of coil electricity, its main contactor reset, the power is cut off of the valve motor valve motor stop working.

Manually locate

In the process of open or close the valve, may at any time, press the stop button SB5 the normally closed contacts disconnect, make KM1 or KM2 coil lose electric release, motor power loss. At the same time, SB5 normally open contacts (19 - W11) closed, KM3 coil electricity and, their contact (9, 10) disconnect, prevent KM1 or KM2 misoperation, KM3 closure of the main contact, make the output of the bridge rectifier and capacitor energy storage effect in the winding of the motor at the same time, the braking torque, the motor instantaneous halt. In this way, can make the right to stop valve to the specified location.

Matters needing attention

Variable resistor RP current-limiting role in this diagram, through adjusting the RP braking current can be obtained, usually braking energy current 4.5 A. Electrolytic capacitor in the figure could be selected according to valve is the power of the motor, if the valve motor under 2 kw of power, can choose 1