ZPA Pečky 52 260, Инструкция по монтажу

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7
Corresponding variant is chosen according to the electric motor power:
contactors BR2 550 output up to 550 W
BR 2,2
output up to 2,2 kW
SSR BR2 BK 550 output up to 550 W
BR BK 2,2 output up to 2,2 kW
Switching of electric motor
The actuators in variants Control are fitted with built-in reversing contactor combinations or SSR switches.
First variant is assembled from two contactors and second variant from contactless switches.
The combination also includes mechanical blocking that prevents both contactors from being closed
at the same time. This could, for instance, happen in case of wrong connection of jumpers on the terminal
board. The blocking is not dimensioned for long-term action. The over-current relays protects the electric motor
against over-loading and is dimensioned with respect to its output. According to the actuator version, the
contactors are controlled by the regulator, change-over switch of local control or external input. Control voltage
is 230 V / 50 Hz as a standard; it is supplied via contacts of position and/or moment micro-switches. Thus,
these micro-switches need not be led out of the actuator. Contactors have defined service life at least 1 million
cycles.
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 mm
2
to be connected.
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.
b) Connector
According to the customer's requirements the MODACT MPSED, MPSPEDJ 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 mm
2
to be connected. 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.
Actuator internal wiring
The internal wiring diagrams of the MODACT MPSED, MPSPED 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. The terminals
are marked on a self-adhesive label attached to a carrying strip under the terminal block.
Isolation resistance
Isolation resistance of electric control circuits against the frame and against each other is min. 20 M
Ω
. After a dump
test, isolation resistance of control circuits is min. 2 M
Ω
. Isolation resistance of the electric motor is min. 1.9 M
Ω
. See
Technical specifications for more details.
Electric strength of electric circuits isolation
Circuits of anti-condensation heater 1 500 V, 50 Hz
Electric motor Un = 1 x 230 V 1 500 V, 50 Hz
Un = 3 x 230/400 V 1 800 V, 50 Hz