Installation Checks - GE 750 Instruction Manual

Overview

Installation Checks

Wiring Diagrams
GE Multilin
parameter data acquisition system. The advantage of simulation is that all metering
calculations can be verified without the inaccuracies associated with current and
voltage sources.
If simulation is not used, the following equipment is necessary to perform any test
included in this chapter:
General Purpose:
• Three-phase variable AC current and voltage source (V, A, phase, Hz).
• Three-phase power multimeter (V, A, phase, Hz, W, var, VA, Wh, varh, PF).
• Variable DC mA source.
• An accurate timing device and multimeters.
Specific Purpose:
• Synchrocheck requires two single phase variable voltage sources with
adjustable frequency and phase.
• Underfrequency requires a dynamic relay test set with at least two preset
modes.
• Distance-to-fault: requires a dynamic relay test set with at least three preset
modes.
• Analog Input Rate of Change requires a DC current generator with the capacity
to generate current ramps adjustable for durations from 1 minute to 2 hours,
and from 0 to 20 mA.
Optional:
• PC running the EnerVista 750/760 Setup software.
1. Check the relay phase current inputs, specified on the nameplate, are correct
for the connected current transformers.
2. Check the relay ground current input, specified on the nameplate, is correct for
the connected CT (if applicable).
3. Check that the relay auxiliary voltage, specified on the nameplate, is correct for
the supplied voltage.
4. Check that the installed relay agrees with the drawings, particularly the Analog
Output range.
5. Check that the external wiring is correct.
6. Check that all grounding terminals of the relay are properly connected to the
ground bus.
The relay test wiring for both "Delta" and "Wye" connections are shown below.
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750/760
Feeder Management Relay
7–3