ZPA Pečky 52 030, Mounting Instructions

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8
Dynamic brake
Brake is an optional equipment of MODACT MON, MOP Control actuators. Upon contactor disconnection, it incites
dynamic braking torque in the electric motor for several tenths of second. It significantly reduces rundown time and thus
makes regulation more precise. No braking torque is applied when actuator is stopped.
Autonomous brake BAM-002 is used for actuators without regulator. For its function, the brake needs supplementary
auxiliary contacts of contactors as well as an additional over-current relay contact. It is designed for electric motors
3 x 230 / 400 V with output up to 550 W.
For actuators with regulator ZP2.RE5, simpler controlled brakes BR2 are used. They are interconnected with
regulator that gives them actuation impulse.
The corresponding version is selected depending on the electric motor version:
BR2 550
up to the output of 550 W,
BR 2.2 up to the output of 2.2 kW.
If outputs higher than 2.2 kW need to be braked, special versions of electric motors with electromagnetic brake must be
applied.
Electric motor switching, contactor unit
Control versions of actuators have integrated reversing contactor combinations. These consist of two contactors and
an over-current relay. The combination also includes mechanical interlocking, which prevents both contactors from
switching at the same time. This could happen for instance as result of wrong connection of jumpers in the terminal box.
Interlocking is not designed for long-term function. Over-current relay protects the electric motor from overloading and is
designed according to its output.
Depending on the actuator version, contactors are controlled by regulator, local control switch or by external input.
Standard control voltage is 230 V/50 Hz and is transferred through contacts of position and/or torque micro switches.
Thus, these micro switches do not need to be led out of the actuator.
6. ELECTRICAL PARAMETERS
External electrical connection
a) Terminal board
Actuator is fitted with a terminal board providing connection to external circuits. Terminal board is provided with
screw terminals for connection of conductors with a maximum section of 4 mm2. Terminal board is accessible upon
removal of terminal box cover. All electrical control circuits of actuator are led to the terminal board. Terminal box is
provided with cable bushings for electric connection of actuator. Electric motor is provided with separate box including
terminal board and bushing.
b) Connector
Upon customer’s request, actuators
MODACT MON, MOP, MONJ can be provided with a connector that enables
connection of control circuits. Connector is provided with crimp terminals for connection of conductors with a maximum section
of 4 mm2. ZPA Pečky, a.s. also supplies terminal counterpart for cable. Special crimping scissors are necessary for attaching
a cable to this counterpart.
Internal electrical connection of actuators
Internal electrical wiring diagrams of MODACT MON, MOP, MONJ actuators including identification of terminals
are included in the present Catalogue.
On the actuator, the internal wiring diagram is depicted on the inner side of the terminal box cover. Terminals are
identified by numbers on adhesive stickers attached on carrying belt below the terminal board.
Current-carrying capacity and maximum voltage of micro switches
Micro switches maximum voltage is 250 V AC and DC at the following maximum current values:
MO, MZ
250 V AC / 2 A; 250 V DC / 0,2 A
SO, SZ 250 V AC / 2 A; 250 V DC / 0,2 A
PO, PZ 250 V AC / 2 A; 250 V DC / 0,2 A