Woodward highprotec MRI4, User Manual

Page: 613 / 727

Commissioning
Commissioning
Before starting work on an opened switchboard it is imperative that the complete switchboard is dead and the
following 5 safety regulations are always met: ,
Safety precautions:
Disconnect from the power supply
Secure against reconnection
Verify if the equipment is dead
Connect to ground and short-circuit all phases
Cover or safeguard all live adjacent parts
The secondary circuit of a current transformer must never be opened during
operation. The prevailing high voltages are dangerous to life.
Even when the auxiliary voltage is switched off, it is likely that there are still
hazardous voltages at the component connections.
All locally applicable national and international installation and safety
regulations for working at electrical power installations must always to be
followed (e.g. VDE, EN, DIN, IEC).
Prior to the initial voltage connection, the following must be guaranteed:
Correct grounding of the device
That all signal circuits are tested
That all control circuits are tested
Transformer wiring is checked
Correct rating of the CTs
Correct burden of the CTs
That the operational conditions are in line with the Technical Data
Correct rating of the transformer protection
Function of the transformer fuses
Correct wiring of all digital inputs
Polarity and capacity of the supply voltage
Correct wiring of the analogue inputs and outputs
For line differential protection: Correct fiber optics connection for a
reliable Protection Communication
The permissible deviations of measuring values and device adjustment are
dependent on the technical data/tolerances.
613 MRI4 DOK-HB-MRI4-2E