MR ETOS TD - 10 Fault Elimination; Motor-Drive Unit

10 Fault elimination
Maschinenfabrik Reinhausen GmbH 2020310 4453918/14 ENETOS
®
TD
10 Fault elimination
This chapter describes how to rectify simple operating faults.
10.1 Motor-drive unit
Characteristics/details Cause Remedy
No tap-change operation possi-
ble
▪ Motor status "Error"
Motor-drive unit not synchronized Synchronize motor-drive unit [►Section 9.19,
Page 178].
No tap-change operation possi-
ble
Motor voltage outside the permissi-
ble range
Check the voltage supply.
No tap-change operation possi-
ble
▪ Event "Blocking the drives" ac-
tive.
Mechanical blocking of the motor-
drive unit or the on-load tap-
changer
Contact Maschinenfabrik Reinhausen GmbH.
No tap-change operation possi-
ble
▪ Status display for OLTC-
PreCheck is red
The OLTC-PreCheck function is
active and one of the limit values
has been exceeded.
Check measured values:
▪ On-load tap-changer oil level
▪ On-load tap-changer oil temperature
▪ Transformer current
Check the configuration
Wiring error Check wiring as per connection diagram.
Sensor defective Replace sensor.
No tap-change operation possi-
ble
▪ No signal from cam switch
S13
Wiring error Check wiring as per connection diagram.
Cam switch S13 is defective Contact Maschinenfabrik Reinhausen GmbH.
No tap-change operation possi-
ble
Motor protection device defective Contact Maschinenfabrik Reinhausen GmbH.
Synchronizing the motor-drive
unit not possible
Wiring error Check wiring as per connection diagram.
Tap position indicator not con-
nected.
Connect the tap position indicator according to
the connection diagram.
Mechanical blocking of the motor-
drive unit or the on-load tap-
changer
Contact Maschinenfabrik Reinhausen GmbH.
Synchronizing the motor-drive
unit not possible
▪ Motor-drive unit switching in
the wrong direction
Wiring error (polarity reversal) Check wiring as per connection diagram.
Table120: Motor-drive unit