SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Page 13 of 74
Switch number Left hand function Right hand function
SW9 Power swing blocking Power swing blocking
disabled enabled
SW8 Disable weak infeed Enable weak infeed option
option (POR) only
SW7 Disable weak infeed Enable weak infeed trip if trip
weak infeed option selected
SW6 Normal A/R action Block A/R if CIS not energised
for schemes 02 to 07 inclusive
SW5 Disable self-checking Enable self-checking
SW4 Normal A/R action Block A/R for 3Ph Z1/AT
faults
SW3 VTS indication only VTS indication and Block
SW2 SOTF dead time 110s SOTF dead time 200ms
SW1 SOTF for any comparator SOTF for current and no volts
operation on any phase
4.9.6 Push button
The push button is used to clear the indications, manually run the comparator self
check and in the test option routine.
4.9.7 Test socket
The test socket SK1 on the front of the module is provided so that the code switches
and push button can be overridden electrically for use with automatic test
equipment.
Pins 1 to 8 of SK1 allow the Code Selection Number (XY) to be overridden.
The number XY is in binary coded decimal form with one input of SK1
corresponding to each bit (see Table 3). Any code selected with the exception of
58 can be overridden by applying the correct code to SK1. Any of the input. pins
which require a “0” should be connected to SK2 pin 2 (0V). The normal state of
the socket (No input present) is “FF” Hexadecimal (All inputs at high state ‘1’).
SK1 pin no. Override function
1 CSW Y Bit 0 Test socket 1 pinout
2 CSW Y Bit 1
3 CSW Y Bit 2
4 CSW Y Bit 3
5 CSW X Bit 0
6 CSW X Bit 1
7 CSW X Bit 2
8 CSW X Bit 3
9 Pushbutton
For example to select Code 41 (01000001) Connect SK2–2 to the following pins
of SK1; 2, 3, 4, 5, 6 & 8. In addition to this the pushbutton can be electrically
driven by connecting SK1 – 9 to SK2 – 2.
5 4 3 2 1
9 8 7 6
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