4.Complete electrical system
includes:
1)
Alternator
2)
Control
Panel for Generator
3)
Local
control desk
4)
Air
Circuit Breaker panel
5)
Battery
Charger and Batteries (24V DC)
6)
Control
panel for gen-set auxiliaries
1. Alternator
Alternator is self-excited,
brush less type and IP 23 enclosure. Alternator is fitted with bearing
temperature detectors.
Technical data of Alternator
-
Rated KVA
1250 KVA
-
Power factor
0.8
lag
-
Max. Alternator output at site
1000 KW
-
Duty
Continuous
-
Rated speed
500 RPM
-
Output voltage
400 V
-
Efficiency at 100% load and 0.8 PF
90.7 %
-
Direction of rotation
anticlockwise
-
Number of poles
12
-
Rated frequency
50 Hz
-
Over-speed
20% for 2 minutes
- Overload capacity and
duration
10%, for max. 1 hr in every 12 hrs
-
Insulation class
F
-
Enclosure
IP 23
-
Temp. rise class
F
-
Excitation and AVR type
Brush-less, AVR
-
Connection
Star
NOTE
Alternator design considers harmonics in load.
2. Control Panel For Generator
2.1 Function
Control
Panel provides necessary Monitoring, Control and Protection functions for the DG
set. It is located in the DG control room.
2.2 Major
Components
1)
Programmable
Logic Controller (PLC)
2)
Generator
Protection relays（SIEMENS）
3)
Automatic
Voltage Regulator
4)
Meters,
indicators, hour counters
5)
Push
buttons, selector switches
6)
Engine
Frequency Monitoring Unit
2.3
Metering Devices
7)
Analog
Engine RPM meter
8)
Ammeters
(3 nos.)
9)
Voltmeter
with selector switch
10)
Frequency
meter
11)
PF
meter
12)
Analog
Excitation fundamental ammeter
13)
Analog
Excitation harmonics ammeter
14)
Counter for running hours
2.4
Generator Protections
15)
Differential
16)
Voltage controlled over current
17)
Under / Over voltage
18)
Under / Over frequency
19)
Earth fault
20)
Very high Alternator bearing
temperature
21)
Reverse power
22)
Field failure
23)
Master trip
2.5
Status Indications
24)
Low lube oil priming pressure
25)
Breaker engaged
26)
Engine start permission
27)
Unit ready for excitation
28)
HFO operation not possible
29)
PLC failure
30)
Ready for excitation
31)
DG breaker ON
32)
DG breaker OFF
33)
DG breaker Tripped
2.6
Alarm Indications
34)
Low lube oil pressure
35)
Low water pressure
36)
Low fuel pressure (in booster
control box)
37)
Low start air pressure
38)
High lube oil temperature
39)
High water temperature engine
inlet
40)
High fuel temperature engine
inlet (in booster control box)
41)
Alternator bearing temperature
high
2.7
Trip Indications
42)
Very low lube oil pressure
43)
Very high lube oil temperature
44)
Very high water engine outlet
temperature
45)
Engine over speed
46)
Emergency stop
47)
Speed sensing failure
48)
Alternator fault
49)
Differential
50)
Under / over voltage
51)
Under / over frequency
52)
Voltage controlled over current
53)
Earth fault
2.8
Controls possible
- Engine speed raise/low
- Engine start
- Engine normal and
emergency stop
54)
Excitation ON / OFF
55)
Excitation Raise / Low
56)
Excitation adjust
57)
Breaker control
- Fault indication
- Lamp test
- Reset
3. Local
Control Desk
3.1
Function
Local Control Desk (LCD)
is provided for monitoring Pressure and Temperature parameters of the engine.
Also starting, stopping and speed control of engine is possible in local
Control” operation mode. It is located near the engine.
3.2
Major Components
58)
Pressure gauges, switches
59)
Temperature indicators or scanner
60)
Scanner for Engine exhaust
temperatures
61)
Push buttons, indicating lamps,
selector switches
62)
Flasher
3.3
Pressure Gauges
63)
Lube oil filter inlet pressure
64)
Lube oil filter outlet pressure
65)
Lube oil cylinder head inlet
pressure
-
Fuel engine inlet pressure
-
Starting air pressure
-
Water engine inlet pressure
3.4
Pressure Switches
66)
Lube oil engine inlet pressure
3.5
Temperature Indicators / scanner
67)
Lube oil engine inlet temperature
68)
Lube oil engine outlet
temperature
69)
Water engine outlet temperature
70)
Water engine inlet temperature
71)
Exhaust gas temperature for each
cylinder
72)
Exhaust gas temperature for
turbocharger
73)
Water temperature for each
cylinder
3.6
Misc. Indications
- Engine RPM indicator
- Common engine alarm
- Engine start permission
3.7
Controls possible from LCD
- Local / remote mode
- Engine start / stop
- Flasher off
74)
Engine speed raise / low
75)
Emergency stop
4. Control
Panel For Gen-set Auxiliaries
4.1
Function
Various DG set auxiliaries
are fed and controlled through the Control Panel for Gen-set Auxiliaries. This
Panel is located in DG control room.
4.2
Major Components
76)
MCCB for incomer
77)
Contactors
78)
MCCB / FSU
79)
Push buttons, selector switches,
indicating lamps
80)
Voltmeter, ammeter
4.3
Outgoing Feeders
- Lube oil priming pump
- Cooling tower fan
81)
Air compressor
82)
Lube oil separator module
83)
HFO separator module
84)
Fuel booster module
85)
DO transfer pump
86)
HFO transfer pump
87)
Standby
88)
Standby
4.4
Controls possible from GACP
89)
Motor / Feeder ON
90)
Motor / Feeder OFF
91)
Auto/ Manual (for specific
feeders)
4.5
Fabrication Details
- Approx. Dimensions
2200 mm(H),800mm(W),800mm(D)
- Protection class
IP 52
- Fault withstand capacity
35 kA for one second
- Frame and base
3 mm CRCA sheet
- Doors and side covers
1.6 mm CRCA sheet
-
Paint shade
Light Gray
-
Cable entry
from bottom
- Bus bar
Copper bar
