6 Commissioning
Maschinenfabrik Reinhausen GmbH 2021
61
8209941/00 EN
ECOTAP
®
VPD
®
III 30D-24 / MD&C
Ensure the correct position of the on-load tap-changer: The marking on the
cam disk
must be in the marked area on the cover
:
Figure 40:
Checking the position of the on-load tap-changer
Further details: See section "Mounting the motor-drive unit".
Power supply during operation
After completing the test tap-change operations, you must adjust the power
supply for the control unit supplied from a separate power source for the
tests.
The electrical voltage of the motor-drive unit and control unit has to be sup-
plied by the controlled transformer itself during operation, because this sig-
nal is also used as the measurement signal.
All-pole isolating device
You may connect the control unit only to circuits with an external overcurrent
protection device and an all-pole isolating device, enabling the equipment to
be fully de-energized if required (service, maintenance, etc.).
Suitable equipment includes isolating devices in accordance with
IEC 60947-1 and IEC 60947-3 (e.g. circuit breakers). Observe the properties
of the relevant circuits (voltage, maximum currents) when selecting the cir-
cuit breaker type. In addition, observe the following:
▪ It must be easy for the operator to access the isolating device
▪ The isolating device must be labeled for the device and the circuits to be
isolated
▪ The isolating device may not be a part of the power line
▪ The isolating device may not interrupt the main protective conductor
You must connect the power supply circuit with a conductor cross-section of
at least 1.5 mm
2
(AWG 16) and protect it with a C10A or B10A type minia-
ture circuit breaker.
Summary of Contents for ECOTAP VPD 3 30D-24
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