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12. SCHEMATICS SINGLE BUSBAR
FUNCTIONAL UNIT
3B / 87
3BX / 87
3P / 87
3PX / 87
3PY / 87
43/AL – DIFF.
43/TAPS
43/ ∅1, 43/2, 43/3
50 + BF/ P1_ _ _ _ P5
50/P1_ _ _ _ P5
52/ P1_ _ _ _ P5
87 (∅1, ∅2, ∅3)
87X/ TRIP
BF/ P1_ _ _ _ P5
P1 _ _ _ _ P5/TF
P1 _ _ _ _ P5/TM
B.F./A
B.F./P1_ _ _ _ P5
B.F./AX
PB/L
PB/87
PP/L
PP/87
PR/L
PR/87
TP1_ _ _ _ TP5
TI AUX/P1_ _ _ _ P5
TI/P1_ _ _ _ P5
PPY/87
3R/87
PK-2
NOTE: Terminals starting by A are part of the Differential rack
Terminals starting by B are part of the Test rack
Terminals starting by C are part of the Breaker failure rack
Terminals starting by D are part of the DTE rack
Terminals starting by F are part of the Differential power supply
Terminals starting by K are part of the Test block
Terminals starting by P are part of the breaker failure power supply
Terminals starting by T are part of the Thyrite box
12-14
DEVICE TYPE
LATCHING RELAY
TEST UNIT
AUXILIARY RELAY HLA Testing auxiliary relay
TEST UNIT
TEST UNIT
TEST UNIT DPR
TEST UNIT DPR
TEST UNIT DPR
MFI
MFI
BREAKER
BUS1000
RE
BUS1000
T. DIF
BUS1000
AL
BUS1000
RD
BUS1000
RF
BUS1000
TRIP
BUS1000
UM
BUS1000
DRD102
EXTERNAL CONTACT
DFI1
DFI1
DTE
SFI
DTE
TEST RACK
TEST RACK
TEST RACK
TEST RACK
TEST RACK
TEST RACK
Terminal
TRANSFORMER
226B2999
MAIN C.T.
AUXILIARY RELAY
AUXILIARY RELAY
189C6051G1
226B2898G2
226B2898G3
PK-2
FIGURE B2211F59. LEGEND
BUS1000 Busbar Protection
DESCRIPTION
Lockout relay 3B/87
Auxiliary of 3B/87
Auxiliary of 3P/87
Testing auxiliary relay
Selector switch of alarm diff. Test
Selector switch of tap selection
Selector switch of phase selection
B.F. & overcurrent supervision relays / positions
P1_ _ _ _ P5
Overcurrent supervision contact positions P1_ _
_ _ P5
Breaker/ position P1_ _ _ _ P5
Differential relay, phases (∅A, ∅B, ∅C)
Stabilising resistor
Differential circuit input current transformer
Alarm unit
Differential Voltage resistor
Restraint Voltage Resistor
Differential trip unit
Measuring unit
Auxiliaries of 87 / TRIP
Breaker failure initiation positions P1_ _ _ P5
Restraint transf. positions P1 _ _ _ _ P5 (input
module)
Measuring transformer positions P1_ _ _ _ P5
Breaker failure
Breaker failure positions P1_ _ _ _ P5
Auxiliary of BF/AB
Blocking lamp
Blocking pushbutton
Test lamp
Test pushbutton
Reset lamp
Rest pushbutton
Differential and restraint voltage measuring
points
Auxiliary current transformer / positions P1_ _ _
_ P5
Main current transformer / positions P1_ _ _ _
P5
Auxiliary remote reset
Stabilisation resistor shorting relay
Breaker failure power supply auxiliary resistors
box
Differential power supply auxiliary resistors box
Block test 6 poles
GEK-98514B
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