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