MR ECOTAP VPD 3 30D-24, Руководство по эксплуатации

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6 Commissioning
Maschinenfabrik Reinhausen GmbH 2021 67 8209941/00 EN ECOTAP
®
VPD
®
III 30D-24 / MD&C
5. Press to activate the AVR MANUAL operating mode.
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Automatic voltage regulation has been checked.
6.3.9 When operating with alternative insulating liquids: activating
temperature blocking
You can operate the on-load tap-changer with alternative insulating fluids
upon request. When doing so, you must ensure that switching operations
cannot be performed during operation if the transformer's insulating fluid
temperature is less than the permissible temperature. You can use the con-
trol unit blocking contact for this.
To use the control unit blocking contact, observe the following points:
▪ The temperature sensor in the transformer tank must be adjusted to the
permissible temperature range.
▪ The temperature sensor must make a signal in the form of a floating con-
tact available, and it must be connected to the control unit blocking con-
tact (terminal X3).
▪ The blocking function parameter (P5) must be set to the value 2 [ ► Sec-
tion 7.4.3, Page 81].
6.3.10 Switching on the low-voltage busbar
NOTICE
Damage to the on-load tap-changer and transformer!
An inrush current impulse which has not fully subsided can damage the on-
load tap-changer and transformer in the event of an on-load tap changing
operation!
► Once the transformer has been switched on, ensure that the inrush cur-
rent impulse has fully subsided before undertaking an on-load tap chang-
ing operation. The inrush current impulses are usually a multiple of the
transformer rated current and can overload the on-load tap-changer dur-
ing the diverter switch operation.
Once you have connected the control unit and undertaken trial tap-change
operations, you can commission the low-voltage busbar as follows:
1. Move the on-load tap-changer to the adjustment position.
It may be a good idea to move the on-load tap-changer into a position other
than the adjustment position. This allows you to reduce the voltage differ-
ences between the grids to be connected and thereby minimize the inrush
current impulse.
2. On the control unit, set the desired operating mode by pressing the corre-
sponding key:
- Auto mode: AVR AUTO
- Manual mode: AVR MANUAL
- Control via remote connection: EXTERNAL CONTROL.
3. Switch on the low-voltage busbar.