5.
Electrical connection
5.1.
Basic information
Danger due to incorrect electrical connection
Failure to observe this warning can result in death, serious injury, or property damage.
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The electrical connection must be carried out exclusively by suitably qualified
personnel.
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Prior to connection, observe basic information contained in this chapter.
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After connection but prior to applying the voltage, observe the <Commissioning>
and <Test run> chapters.
Wiring diagram/terminal
plan
The pertaining wiring diagram/terminal plan is in the cover of the electrical connection.
The operation manual is attached to the device in a weather-proof bag.
Valve damage for connection without controls!
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NORM actuators require controls: Connect motor via controls only (reversing
contactor circuit).
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Observe the type of seating specified by the valve manufacturer.
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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
delay 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
switching off the corresponding contactor directly by limit or torque switch.
Limit and torque switch-
es
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:
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For signaling use the leading contacts TSC1, TSO1, LSC1, LSO1.
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For switching off use the lagging contacts TSC, TSO, LSC, LSO.
Current type, mains
voltage, mains frequen-
cy
Type of current, mains voltage and mains frequency must match the data on the
motor name tag. Also refer to chapter <Identification>/<Name tag>.
Figure 18: Motor name tag (example)
[1]
Type of current
[2]
Mains voltage
[3]
Mains frequency (for 3-ph and 1-ph AC motors)
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 motor name tag).
21
SAEx 25.1 – SAEx 35.1 / SAREx 25.1 – SAREx 30.1
NORM (without controls)
Electrical connection
