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Generator Differential
Protection: Negative phase sequence, Over
current, Under excitatio, Reverse power,
AVR
Instruments
Stator Earth fault
Synchronizing, AVR, Over/under
voltage, Over/under frequency,
under excitation
Generator
Differential
Gen TX Differential
Synchronizing
NVD
Gen TX Differential
Over current
REF, Earth Fault
To station
auxiliary
OVERCURRENT
Station
Transformer 1 (new
stx)
Metering
Metering
Metering
-
TO STATION
AUXILIARIES BOARD
Alternative Feeder
(old Stx)
Metering
TANA
FEEDER 2TANA
FEEDER 1
Generator Metering
GEN 1GEN 2 GEN 3 GEN 4
11kV OVERHEAD BUSBAR
Stx Overcurrent
DRAWING No.1 PROPOSED SINGLE LINE DIAGRAM FOR WANJII POWER
STATION
11 kV POWERHOUSE SWITCHBOARD
-
TO
MAIN 415VAC
SWITCHBOARD
TANA FEEDER 2TANA FEEDER 1
GENERATOR
TX 2GENERATOR
TX 1
STATION TX 1
ALTERNATIVE
FEEDER
(OLD STX)
MATHIOYA RIVER UNITSMARAGUA RIVER UNITS
TO
MAIN 415VAC
SWITCHBOARD
DRAWING NO 2. PROPOSED POWER EVACUATION DIAGRAM
MAIN AUXILIARY POWER SWITCHBOOARD
415VAC INCOMERS
STATION TX 1 ALTERNATIVE
FEEDER
DIESEL
GENERATOR
MCC 1 MCC 2 DRAINAGE
PUMPS
MCC 2MCC 1 WINCH
BUS
COUPLER
CB 1 CB 2 CB3
STATION
AUX. BOARD
STATION
AUX. BOARD
EMERGENCY
LIGHTING
DRAWING NO 3. PROPOSED MAIN AUXILIARY POWER SWITCHBOARD
INCOMER 1 INCOMER 2
GOVERNOR
PUMP 1 & 2
GENERATOR
HEATER 1LEAKAGE
PUMP1
LUBRICATING
PUMP 2
COOLING
PUMP 1
COOLING
PUMP 2
GOVERNOR
PUMP 2
LEAKAGE
PUMP 2
GENERATOR
HEATER 2LUBRICATING
PUMP 1
DRAWING NO 4. PROPOSED STATION AUXILLIARY MOTOR CONTROL CENTER LINE
DIAGRAM
MOTOR CONTROL CENTRES 1 OR 2
(MCC 1 OR 2)
INCOMER 1 INCOMER 2
POWER
HOUSE
LIGHTING
OFFICES
DISTRIBUTION
BOARD
POWER
OUTLETS-
WORKSHOP
POWER
HOUSE
CRANE
BATTERY
CHARGERSSECURITY
LIGHTING
POWER
OUTLETS-
POWER
HOUSE
TAILRACE
HOIST
PORTAL VALVE/
INTAKE GATE
STATION MOTOR CONTROL CENTRE
(STATION MCC)
DRAWING NO 5. PROPOSED MOTOR CONTROL CENTER LINE DIAGRAM