Assemblies; Operation; Normal Mode; Handwheel Mode - ABB Contrac LME620AI Instructions Manual

Electrical linear actuators for continuous modulating control

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5. Assemblies

Figure 1: LME 120 ...

The motor triggered by the electronics drives the axially fixed drive sleeve/nut assembly

via greased spur gears. A ball bearing screw radially fixed by an anti-twist arrester con-

verts the rotary to a linear motion.

The brake built in the motor acts as a retainer when the power is off.

The friction clutch is designed such that a handwheel force of around 11 N suffices to

create the rated torque on the actuator. If you should feel a considerable counter-force

when moving the actuator by hand, do not increase the force you apply to the hand-

wheel. Otherwise, you might damage the actuator or valve

- Allows you to move the actuator manually when the electrical power is off.

- Turn the handwheel lock lever clockwise to unlock the handwheel.

- Turn the handwheel to move the thrust rod to the desired position.

- Release the locking lever to lock the handwheel again.

d0042rxa

1: Handwheel

2: Handwheel lock

3: Thrust rod

4: Ext. stop

5. Gearbox

6. Connector plug

7. CSF

8. Cover

(for LME 620 AI incl.

electronics

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Contrac lme620an