AUMA SQEx 12.2 - Electrical Connection; Basic Information

Electrical connection
17
6
Electrical connection
6.1
Basic information
WARNING
Electric shock due to presence of hazardous voltage!
Failure to observe this warning can result in death, serious injury, or property damage.
à The electrical connection must be carried out exclusively by suitably qualified per-
sonnel.
à Prior to connection, observe basic information contained in this chapter.
Wiring diagram/terminal
plan
The pertaining wiring diagram/terminal plan is in the cover of the electrical connection.
NOTICE
Valve damage when connecting to actuator controls!
à NORM actuators require actuator controls: Connect motor via actuator controls
only (reversing contactor circuit).
à Observe the type of seating specified by the valve manufacturer.
à The torque switches also serve the purpose of valve overload protection and must,
therefore, also be connected for limit seating.
à Observe wiring diagram.
Delay time
The delay time is the time from the tripping of the limit or torque switches to the motor
power being switched off. To protect the valve and the actuator, we recommend a de-
lay time < 50 ms. Longer delay times are possible provided the operating time, output
drive type, valve type, and the type of installation are considered. We require switch-
ing off the corresponding contactor directly by limit or torque switch.
Limit and torque switches Limit and torque switches can be provided as single, tandem, or triple switches. Only
the same potential can be switched on the two circuits (NC/NO contact) of each single
switch. If different potentials are to be switched simultaneously, tandem switches or
triple switches are required. When using tandem/triple switches:
• For signaling use the leading contacts TSC1, TSO1, LSC1, LSO1.
• For switching off use the lagging contacts TSC, TSO, LSC, LSO.
Current type, mains volt-
age, mains frequency
Type of current, mains voltage and mains frequency must match the data on the motor
name tag. Also refer to Chapter Motor name tag [}9].
Figure12: Motor name tag (example)
[1] [2] [3]
[1] Type of current [2] Mains voltage
[3] Mains frequency
Protection and sizing on
site
For short-circuit protection and for disconnecting the actuator from the mains, fuses
and disconnect switches have to be provided by the customer.
The current value for sizing the protection is derived from the current consumption of
the motor (refer to Name tag [}9]).).
We recommend adapting the switchgear sizing to the max. current (I
max
) and to select
and set the overcurrent protection device in compliance with the indications in the
electrical data sheet.
Protection via thermal mo-
tor protection
According to FM approvals, thermal switches for thermal motor protection must be
connected to external controls for explosion-proof actuators.