GE P444 User Manual

Application Notes
P44x/EN AP/Hb
6
MiCOM P40 Agile P442, P444
(AP) 5-
157
When autoreclosure is not required for multiphase faults, DDB signals '2Ph Fault' and '3Ph
Fault' can be mapped via the PSL in a logic OR combination onto input DDB: 'BAR' (Block
internal AutoReclose, section 5.9.1.5). When blocking is only required for a three phase fault,
the DDB signal '3Ph Fault' is mapped to 'BAR' alone. Three phase faults are more likely to
be persistent, so many utilities may not wish to initiate autoreclose in such instances.
The next diagram shows the block autoreclose logic.
bit
setting
DDB
bit
setting
DDB
Autoreclose lockout / Block A/R
00 At T2 T2 11 Thermal Trip Trip Thermal
01 At T3 T3 12 I2>1 Trip I2> Trip
02 At Tzp tZp 13 I2>2 Trip I2>2 Trip
03 LoL Trip Loss. Load Trip 14 I2>3 Trip I2>3 Trip
04 I>1 Trip I>1 Trip 15 I2>4 Trip I2>4 Trip
05 I>2 Trip I>2 Trip 16 VN>1 Trip VN>1 Trip
06 V<1 Trip V<1 Trip 17 VN>2 Trip VN>2 Trip
07 V<2 Trip V<2 Trip 18 At Tzq tZq
08 V>1 Trip V>1 Trip 19 V<3 Trip V<3 Trip
09 V>2 trip V>2 Trip 1A V<4 Trip V<4 Trip
0A IN>1 Trip IN>1 Trip 1B V>3 Trip V>3 Trip
0B IN>2 Trip IN>2 Trip 1C V>4 trip V>4 trip
0C Aided D.E.F
Trip
DEF Trip A C 1D I<1 Trip I<1 Block
OR DEF Trip B 1E I<2 Trip I<2 Block
OR DEF Trip C
Autoreclose lockout / Block A/R 2
0D Zero. Seq. ZSP Trip 00 F<1 Trip F<1 Trip
Power Trip 01 F<2 Trip F<2 Trip
0E IN>3 Trip IN>3 Trip 02 F<3 Trip F<3 Trip
0F IN>4 Trip IN>4 Trip 03 F<4 Trip F<4 Trip
10 PAP Trip PAP Trip A 05 F>2 Trip F>2 Trip
OR PAP Trip B
OR PAP Trip C
Figure 119: Block autoreclose logic

GE P444 Specifications

General

Brand	GE
Model	P444
Category	Protection Device
Language	English