EMR-5000
IM02602012E
Commissioning
Before starting work on an open switchboard, it is required that the switchboard is de-energized and the following five
safety regulations have been met.
Safety precautions:
Disconnect the power supply;
Secure against reconnection;
Verify that the equipment is de-energized;
Connect to ground and short-circuit all phases; and
Cover or safeguard all live adjacent parts.
The secondary circuit of a current transformer must never be opened during
operation. The prevailing high voltages can cause severe injury or death.
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.
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; and
Correct wiring of the analog inputs and outputs.
The permissible deviations of measuring values and device adjustment are
dependent on the Technical Data/Tolerances.
www.eaton.com
885
