Alstom SHPM 101 - Section 4. MODULE DESCRIPTIONS; 4.9.46 Scheme logic test program

SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Page 24 of 74
Timer function Timer length Timer resolution
SOTF CURRENT NO 20ms –
VOLTS PICK UP
ZONE 2 DELAYED 0 – 250ms 10ms
TRIP PICK UP
ZONE 3 DELAYED 0 – 580ms 40ms
TRIP PICK UP
TRIP DROP OFF 60ms –
VTS PICK UP 5.5s –
PSB PICK UP 50ms –
SELF CHECK ENABLE 2 weeks –
(CONTINUOUSLY RUN)
Table 4: Interrupt timer
Timer function Timer length
ZONE 1 PHASE COMPARATOR BLOCK 35ms
ZONE 2 PHASE COMPARATOR BLOCK 35ms
POLE DEAD ‘A’ PHASE PICK UP 20ms
POLE DEAD ‘B’ PHASE PICK UP 20ms
POLE DEAD ‘C’ PHASE PICK UP 20ms
BAND PASS FILTER VOLTAGE DROP OFF 14ms
WEAK INFEED ANY COMPARATOR DROP OFF 100ms
POR/WEAK INFEED CARRIER ECHO TIME 100ms
COMPARATOR CHECK PICK UP TIMER 10ms
Table 5: Loop timers
4.9.46 Scheme logic test program
The scheme logic test program is a group of options that are selectable via the
code switches. These options are divided into two groups:
a) input test options.
b) output test options.
The input test options are listed in Table 6, indication is given on the 8 LED’s (A, B,
C, Z2. Z3, AIDED TRIP, SOTF, V~FAlL) when the correct CSN is set. The 8 LED
outputs are available on socket 2 (See Section 5.16.42).
The output test options are listed in Table 7.
To set any output, firstly the correct CSN corresponding to the test option required
must be selected. The appropriate option switch must be set to the right hand
position and the push button should be operated. Only one group of outputs (one
test option number) can be energised at any one time.
All the TRIP contact output test options are put in a separate option (88) away from
the others to prevent inadvertent operation of circuit breakers, etc.