4 Product description
Maschinenfabrik Reinhausen GmbH 202026 6385142/08 ENETOS
®
ED
4 Product description
4.1 Scope of delivery
The motor-drive unit is packaged with protection against moisture and is de-
livered as follows:
▪ Motor-drive unit
▪ Product documentation
Please note the following:
1. Check the shipment for completeness on the basis of the shipping docu-
ments.
2. Store the parts in a dry place until installation.
3. The product must remain in its airtight, protective wrapping and may only
be removed immediately before installation.
4.2 Function description
The motor-drive unit adjusts the operating position of on-load tap-changers
in regulating transformers to the individual operating requirements.
The tap-change operation is initiated by activating the motor-drive unit (a sin-
gle control impulse is triggered, for example via the optional "Automatic volt-
age regulation AVR basic/pro" function package). This adjustment operation
is always completed regardless of any other control impulses issued during
the tap-change operation. In the standard design, the next tap-change oper-
ation can only proceed once all control devices have reached their resting
positions.
Behavior in the event of a voltage interruption
Should the voltage be interrupted during an on-load tap-change operation,
once the voltage supply returns, the motor-drive unit completes the started
on-load tap-change operation.
4.3 Performance features
Depending on your order, the device is equipped with the following optional
function packages:
▪ Basic monitoring
– Voltage, current, frequency
– Active power, reactive power, apparent power, power factor
– Temperature monitoring (ambient temperature, temperature of top-oil,
temperature of bottom oil (optional), calculation of hot-spot temperature
in accordance with IEC 60076-7 or IEEE C57.91)
– Optional: Transformer oil level
– Loss-of-life and relative aging rate
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