SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Appendix A
Page 58 of 71
Figure 67: External connection diagram: Quadramho static distance protection relay
1 and 3-phase tripping
Notes:
1. Heavy duty connectors
a) Closes when heavy duty connector is removed.
b) Opens when heavy duty connector is removed.
c) Opens after operation of a) and b) when heavy
duty connector is removed.
2. Breaker open opto must be connected if busbar VT’s are
used or if the weak infeed or echo features of the permissive
overreach scheme are required. CB auxiliary contacts must
be connected in series to indicate ‘all poles open’.
3. Under healthy operating conditions this contact is held open.
4. Removal of IZ heavy duty connector disables all auxiliary relay
output contacts and closes relay inoperative alarm.
5. Connectors shown are typical only.
6. When busbar VT’s and a single phase tripping scheme
incorporating P.S.B. are used this opto must be energised
during single pole dead times.
7. When 3 phase tripping scheme is used Trip A, Trip B, Trip C
and Any Trip respond as Trip 3 Phase.
A2
A1
Reset Z1 ext
A4
A3
Breaker open
(See note 2)
A6
A5
Channel in service
A8
A7
A10
A9
Signal receive
Inhibit power swing blocking
(See note 2)
A11
I
Z1
A13
I
Z2
A15
I
Z3
A12
I
Z4
A17
I
Z5
A18
I
Z6
Va
Vb
Vc
Vn
ac – ve
ac – ve
A19
I
V1
A20
I
V2
A21
I
V3
A22
I
V4
A23
I
V5
A24
I
V6
A25
I
V7
A26
I
V8
95z-1 B1
Signal send (1)
B2
95z-2 B3
Signal send (2)
B4
94A-1 B5
Trip A (1)
B6
94A-2 B7
Trip A (2)
B8
94B-1 B9
Trip B (1)
B10
94B-2 B11
Trip B (2)
B12
94C-1 B13
Trip C (1)
B14
94C-2 B15
Trip C (2)
B16
94T-1 B17
Trip 3PH (1)
B18
94T-2 B19
Trip 3PH (2)
B20
94-1 B21
Any trip (1)
B22
94-2 B23
Any trip (2)
B24
96-1 B25
Block A/R
B26
I
Z7
I
Z8
19A-1 C1
Fault locator A
B2
19B-1 C3
Fault locator B
C4
19C-1 C5
Fault locator C
C6
19E-1 C7
Fault locator ground fault
C8
Z2-1 C9
Zone 2 trip alarm
C10
Z3-1 C11
Zone 3 trip alarm
C12
94V-1 C13
Aided trip alarm
C14
98-1 C15
SOFT trip alarm
C16
97X-1 C17
Fuse fail alarm
C18
95-1 C19
Power swing alarm
C20
97Y-1 C21
Relay inoperative alarm
(See note 3)
C22
See note 7
VT secondaries
S2 S1
P2 P1
A
B
C
Direction of power flow
for operation
(See note 5)
Phase rotation
A
B
C
0V
I
Z10
(See note 4)
Output
relays
common
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