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 (both in German and English) is attached
to the device in a weather-proof bag, together with these operation instructions. It
can also be requested from AUMA (state order number, refer to name plate) or
downloaded directly from the Internet (http://www.auma.com).
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
recommend switching off the corresponding contactor directly by limit or torque
switch.
Protection 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 respective sizing is derived from the current consumption of
the motor (refer to electrical data sheet).
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:
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For signalling use the leading contacts TSC1, TSO1, LSC1, LSO1.
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For switching off use the lagging contacts TSC, TSO, LSC, LSO.
Type of current, mains
voltage and mains fre-
quency
Figure 14: Motor name plate (example)
[1]
Type of current
[2]
Mains voltage
[3]
Mains frequency (for 3-ph and 1-ph AC motors)
18
SAI 07.2 – SAI 16.2 / SARI 07.2 – SARI 16.2
Electrical connection
for use in nuclear power plants
