Design And Function; Design; Principle Of Operation - ABB RHDE250 Series Operating Instruction

Electrical rotary actuator

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Table of Contents

RHDE250 to RHDE4000 (Contrac) ELECTRICAL ROTARY ACTUATOR | OI/RHDE250_4000-EN REV. B

3 Design and function

1 Hand wheel crank

2 Handwheel

3 Ball-and-socket joint

4 Output lever

5 Lever cover

Figure 2: RHD (illustrations may differ from actual installation)

Compact actuator for the operation of final control elements

with preferably 90° rotary movement such as valve flaps, ball

valves, etc.

The nominal torque is transferred through a lever actuator.

A special electronic unit controls the actuator. The special

electronic unit serves as the interface between actuator and

control system.

During continuous positioning, the electronic unit varies the

motor torque steplessly until the actuator force and the control

valve force are balanced. High response sensitivity and high

positioning accuracy with short positioning time ensure an

excellent control quality and a long actuator life.

Change from two to one column

M10575

6 Output shaft

7 Adjustable stops

(under the lever cover)

8 Control motor

9 Handwheel unlock

Table of Contents