Alstom SHPM 101 - Page 268

SERVICE MANUAL R5888B
QUADRAMHO Chapter 5
Addendum 2
Page 2 of 13
PHASE CURRENT LEVEL DETECTOR CHECKS
Low-sets (test option 43)
Pick-up =
100 K1 + K2
5
x
4.8
x I
n
A (±10%)
K1 + K2 = ________
I
n
= ________ A Nominal pick-up = _________
Level Terminals LED Pick-up Drop-off Reset
detector injected indication volts volts ratio (%)
A phase 1Y 1 – 2 Z3
B phase 1Y 3 – 4 Aided trip
C phase 1Y 5 – 6 SOTF
High sets (test option 53)
Pick-up =
100 K1 + K2
12.1
x
4.8
x I
n
A (±10%)
= ________ A
Level Terminals LED Pick-up Drop-off Reset
detector injected indication volts volts ratio (%)
A phase 1Y 1 – 2 Z3
B phase 1Y 3 – 4 Aided trip
C phase 1Y 5 – 6 SOTF
RESIDUAL CURRENT LEVEL DETECTOR CHECKS
Low-set (test option 43, LED indication V~FAIL)
Minimum operate level =
100 K1 + K2
2
x
4.8
x I
n
A (±20%)
= ________ A
Measured value injecting into A phase (1Y 1 – 2) = _____________ mA
Measured value injecting into B phase (1Y 3 – 4) = _____________ mA
Measured value injecting into C phase (1Y 5 – 6) = _____________ mA