ZPA Pecky, a.s. MODACT MTNED 15, Инструкция по монтажу

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To extend the service life we recommend using contactless reversing unit with a minimum service life of 3 million cycles. The
standard control voltage is 24V DC. It is used for output into 4 kW or 7.5 kW. The unit consists of semiconductor elements - thyristors.
6. ELECTRIC PARAMETERS
External electric connection
a) Actuator terminal board
The electric actuator is equipped with a terminal board for connection to external circuits. This terminal board uses screw
terminals allowing conductors with a maximum cross-section 4 sqmm to be connected. For connecting of signalling
conductors to control circuits terminals it is used by conductors of maximal midship 1,5 sqmm. Access to the terminal board
is obtained after removal of the terminal box cover. All control circuits of the electric actuator are brought out to the terminal
board. The terminal box is fitted with cable bushings for connecting the electric actuator. The electric motor is fitted with an
independent box with a terminal board and a bushing. Alternativelly it is possible to deliver actuators with connector.
b) Connector
According to the customer's requirements the MODACT MTNED, MTPED actuators can be fitted with the connector
to provide for connection of control circuits. This connector uses screw terminals allowing conductors with a maximum
cross-section 4 sqmm to be connected. For connecting of signalling conductors into the crimp terminals of control
circuits it is used by conductors of maximal midship 1,5 sqmm. ZPA Pečky, a.s. also supplies a counterpart for the cable.
In order to connect the cable to this counterpart it is necessary to use special crimping pliers. After an agreement it is
possible to rent or buy crimp pliers in ZPA Pečky, a.s. based under certain conditions.
Actuator internal wiring
The internal wiring diagrams of the MODACT MTNED, MTPED actuators with terminal designation are shown
in this Mounting and operating instructions..
Each actuator is provided with its internal wiring diagram on the inner side of the terminal box. Terminals are marked
by numbers on source board. Carrying strap and self-adhesive label with numbers is at electromechanical board.
Isolation resistance
Isolation resistance of electric control circuits against the frame and against each other is min. 20 Mohm.
After a dump test, isolation resistance of control circuits is min. 2 Mohm. Isolation resistance of the electric motor
is min. 1.9 Mohm. See Technical specifications for more details.
Electric strength
Circuits of anti-condensation heater 1 500 V, 50 Hz
Electric motor Un = 3 x 230/400 V 1 800 V, 50 Hz
Deviations of basic parameters
Tripping thrust ±12 % of max. value of range
Adjusting speed - 10 % of max. value of range
+15 % of rated value (idle run)
Clearance of output part max. 1 mm
Protection
The actuators are fitted with one internal and one external protection terminal for ensuring protection against elect-
ric shock injury according to ČSN 33 2000-4-41 ed. 2. One protection terminal is also installed on the electric motor.
The protection terminals are marked according to ČSN EN 60 417-1 and 2
(013760).
7. DESCRIPTION
In respect of their basic connecting dimensions, the actuators have been engineered for direct mounting to the valve.
The connection of the actuator to the valve is provided by means of columns according to ČSN 18 6314, Art. 1.3, or by
means of columns and a flange
(in non-standard design MTNED, MTPED 40 only) .
To transfer movement of output actuator rod to valve are actuators equipped with a clutch according to ČSN 18 6314, type A,
article 1.3 (with internal screw-thread) or type B, article 1.3 (with external screw-thread) - see dimensional sketches and Table no. 2.
Actuator configuration (Fig.1)
The three-phase asynchronous motor 1 drives via countershaft gearing 2 the sun gear of a differential gear unit
enclosed in the supporting actuator box (power gear transmission) 3. In the mechanical power control mode, the