50 Program features
Customer I/O
MV station monitoring and control
Medium voltage station monitoring and control feature can be configured to protect the
transformer and to control the medium voltage switchgear. The software features to IOs
can be configured with parameters in group 177 MV Station. See descriptions in the
following sections: Digital inputs, Analog inputs and Digital output.
For details of the I/O connections, refer to the Hardware manual and Commissioning and
maintenance manual.
Digital inputs
There are eight configurable protective digital input features for medium voltage
transformer and for medium voltage switchgear:
• Transformer temperature alarm
• Transformer temperature fault
• Transformer over pressure
• Transformer low oil level
• Transformer vacuum failure
• Transformer gas discharge fault
• Breaker opening
• Phase loss detection.
Any of these features can be configured to use any of the customer interface digital inputs
of the inverter. For actual connections of digital inputs, refer to the Hardware manual.
Each configured digital input feature has the following set of parameters:
Parameter type Selection list 0X20 terminal
Source Off [0]
On [1]
Digital input X20.1 [2]
Digital input X20.2 [3]
Digital input X20.3 [4]
Digital input X20.4 [5]
Digital input X20.5 [6]
Digital input X20.6 [7]
Digital input X20.7 [8]
Spare DI8 [9] Not supported
in this release.
Spare DI9 [10]
Spare DI10 [11]
Spare DI11 [12]
Spare DI12 [13]
Input action No action [0]
Delayed warning [1]
Warning and delayed fault [2]
Delayed fault [3]
Fault and delayed MV breaker opening [4]
Action delay Delayed action defined in the above action parameters
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