Maximum Of Residual Power Protection - Zero Sequence Power Protection ("Zero Seq Power" Menu) - GE MiCOM P40 Agile Technical Manual

Setting
MiCOM P40 Agile P442, P444
Menu text
GROUP 1 – NEG SEQUENCE O/C
I2>4 Status
I2>4 Directional
I2>4 VTS Block
I2>4 Current Set
I2>4 Time Delay
I2>4 Time VTS
I2> Char angle
Where negative phase sequence current may flow in either direction through a relay
location, such as parallel lines or ring main systems, directional control of the element
should be employed (see section P44x/EN AP).
2.6 Maximum of Residual Power Protection – Zero Sequence Power Protection ("Zero Seq
Power" menu)
The 'Zero Seq Power' menu is displayed when 'CONFIGURATION/Earth Fault Prot' cell is
set to "Zero Seq Power".
The following chart shows the adjustment menu for the zero-sequence residual overcurrent
protection, the adjustment ranges and the default in-factory adjustments.
Menu text
GROUP1 – ZERO-SEQ. POWER
Zero Seq. Power Status
Setting that enables or disables the zero sequence power protection.
K Time Delay Factor
Setting for the K time delay factor. The K time delay factor adjusts the IDMT T(s) time-delay.
T(s) = K × (S
ref
– S = Reference residual power
ref
– S = Residual power generated by the fault
r
Basis Time Delay
Setting for the basis time delay.
Residual Current
Setting for the residual current.
Residual power
Setting to adjust the residual power threshold.
Default setting
Disabled
Non Directional
Block
0.20 x In
10.00 s
0.200 s
- 45°
Default setting
Activated
/S ) where:
r
1s
100mA
500 mVA
Setting range
Min
Disabled, Enabled
Non-directional, Directional FWD, Directional
REV
Block, Non-directional
0.08 x In
0 s
0 s
-95°
Setting range
Min
Activated / Disabled
0 0
0 s
50mA
300 mVA
P44x/EN ST/Hb6
(ST) 4-27
Step size
Max
4.00 x In 0.01 x In
100.0 s 0.01 s
100.0 s 0.01 s
95° 1°
Step size
Max
2 0.2
10 s 0.01s
1A 10mA
6.0 VA 30.0 mVA