Troubleshooting – Protection and Control
Problem or maloperation in…
Problem Description
Corrective Action
After first start-up of the protective device there is a
pending trip.
Two red LEDs are illuminated at the front of the
HMI. They indicate a trip and an alarm.
With the factory default settings the protection relay is
configured with an undervoltage protection. Adapt the
settings of the undervoltage protection or remove this
module from the device project settings (if you do not need
it). If you have any problems with acknowledging the
pending alarm, please refer to „Failure of a binary output“.
The switchgears can not be operated by SCADA
communication.
Set the switching authority of the device to „remote“.
Current and Voltage measurement
The measured values of current and voltage
have a big fluctuation.
Adjust the field parameters´ general settings to the
connected grid frequency (50Hz or 60Hz).
Binary outputs do not react.
The contacts of the binary outputs do not open
or close. This can be checked by simulating a
fault and checking the binary output contacts
with measurement equipment.
Check the following issues:
•
Acknowledge the binary outputs, if applicable.
•
Is the status of the binary output forced to a
dedicated value? (The binary output can be
overwritten for commissioning purpose, refer to
<Service/ Test>.)
•
Is the correct parameter set active (1..4)?
•
Is the required protection function active?
•
Is overall protection active?
•
Are the field parameters set correctly (CT ratio
etc.)?
HighPROTEC Troubleshooting Guide DOK-HB-TSE Rev. B
14
