ZPA Pecky, a.s. Modact MOKP 100 Ex Series, Руководство по сборке и эксплуатации

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Tripping torque
At the factory, the tripping torque has been adjusted as shown in Table 1, according to the customer’s requirements.
If no tripping torque adjustment has been specified by the customer the maximum tripping torque is adjusted.
Self-locking
Actuator self-locking capacity is provided by mechanical electric motor brake, at actuator type no. 52 320 by mechanic
gearbox brake.
Sense of rotation
When looking at the output shaft in the direction towards the control box, the CLOSE direction of rotation is identical
with the clockwise sense.
Working stroke
The working stroke of
MODACT MOKP Ex
actuators is 90°.
Manual control
Manual control is performed directly by a handwheel (without clutch). It can be used even when the electric motor is
running (the resulting motion of the output shaft is determined by the function of the differential gear). When the handwheel
is rotated clockwise the output shaft of the actuator also rotates clockwise (when looking at the shaft towards the control
box). On condition that the valve nut is provided with left-hand thread, the actuator closesthe valve.
Torque-limit switches in the actuator are set and work when the actuator is under voltage.
When using the manual control, ie. actuator is controlled mechanically, the torque-limit switches doesn´t
work and the valve can be damaged.
ACTUATOR OUTFIT
Torque-limit switches
The actuator is fitted with two torque-limit switches (MO – OPEN, MZ – CLOSE) each of which acts only in one direction of
motion of the actuator output shaft. The torque-limit switches can be set to operate at any point of the working stroke .
The tripping torque can be adjusted within the range shown in Table 1. The torque-limit switches are locked if
the load torque is lost after they have been brought into the OFF-position. This feature secures the actuator against
the so-called “pumping”.
Position-limit switches
The PO – OPEN and PZ – CLOSE position-limit switches limit the actuator working stroke, each being adjusted to
operate in either end position.
Position signalling
For signalling position of the actuator output shaft, two signalling switches, i.e. the SO – OPEN signalling
switch and the SZ – CLOSE signalling switch, are used. Each of these switches acts only in one direction of
output shaft rotation. The operating point of the microswitches can be set within the whole working stroke range
except the narrow band before the operating point of the microswitch used to switch off the electric motor.
Position transmitters
The
MODACT MOKP Ex
electric actuators can be supplied without position transmitter or can be fitted with position
transmitter:
a) Resistance transmitter 2 x 100 Ω .
Technical parameters:
Position scanning resistance
Turning angle 0° – 160°
Non-linearity ≤ 1 %
Transition resistance max. 1.4
Ω
Permitted voltage 50 V DC
Maximum current 100 mA
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