Direction Indicator; Mlp Status - GE MLP1000 Manual

4. 10. DIRECTION INDICATOR

The MLP has a phase direction indicating unit that provides information of whether
the direction of the current circulating through the line is in the trip direction or the opposite
direction.
The measurement is obtained by measuring the lag between the voltage and the
phase current
The direction indicator is activated when the phase difference between V0 and I0, is
less than 90°
The direction indicator remains deactivated when the phase difference between VØ
and IØ, is greater than 90°.
The measurement updates the actual measurement unit status in 4/5 ms depending
on the frequency (50 or 60 Hz).
When putting the relay into service, this function allows you to check that the
voltages and currents are properly connected.

4.11 MLP STATUS

You can request the MLP status which will provide general information about the
status of the protection, relay model and version, actual values (modules) of the phase
voltages, phase and zero sequence currents (VA, VB, VC, IA, IB, IC, I0) and the date and
time.
The protection status can be requested through the remote communications channel
or through the MMI, in which case the protection will return all of the values and the date
and tine label.
The protection general status information consists of:
* Model and version of the MLP unit.
* Date and time.
* General status of the MLP:
Trip signal:
by ROD.
by LPU.
in Zone 3.
in Zone 2.
in Zone 1.
Protection enabled or disabled.
Recloser status Breaker status.
Phase A direction indicator
Phase B direction indicator.
Phase C direction indicator.
* Voltage and current module
GEK-98846A
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