| Specifications |
| Output |
: |
1000
KVA - 8000 KVA |
|
| Supply
Voltage |
: |
Three
phase - 415 V, 3300V, 6600 V, 11000V |
| Frequency |
: |
At
60 Hz, 50 Hz, 25 Hz |
| Insulation |
: |
Class
F ( Standard ), Class H ( Optional ) |
| Speed |
: |
1500
RPM, 1000 RPM, 750 RPM, 600 RPM, 500 RPM |
| Enclosures |
: |
SPDP
( IP23 ), CACW ( IP 44 ), CACA ( IP 44 ) |
| Bearings |
: |
Single
or double grease lubricated anti - friction
bearings
Oil lubricated white metal lined sleeve bearings |
| Excitation |
: |
Brushless
Type |
| Prime
mover |
: |
Diesel
engine, steam turbine, hydro turbine, gas
turbine |
| Standards |
: |
IS
4722, IEC 34 - 1, IEEE 115 |
| Stator |
| Frame |
: |
Fabricated
with Mild Steel |
| Core |
: |
Built
up from low loss silicon steel laminations
coated with varnish
Radial ventilation design for better cooling,
no hot spots, low noise |
| Winding |
: |
Class
"F" insulation |
| Rotor |
| Shaft |
: |
From
steel forgong |
| Poles |
: |
Laminated
/ Solid |
| Rotor
hub |
: |
Integral
with shaft / fabricated from steel plates |
| Pole
fitment |
: |
Bolted
/ Dove - tailed |
| Pole
coils |
: |
Multilayer
/ Single Layer |
| Insulation |
: |
Class
"F" |
| Damper
Winding |
: |
Connected
Copper Cage ( for laminated poles) |
| Bearings |
| Anti
- friction type |
: |
For
smaller rating |
| Sleeve
type |
: |
For
higher rating |
| Bearing
Insulation |
: |
NDE
side bearing is of insulated type |
Terminal
Boxes
- Generally 1 each for Main and Neutral
- Phase Segregated Terminal Box tested
to withstand 43 kA for 0.25 seconds as
optional
AVR
and Excitation System: Crompton Greaves
offers a wide choice of AVR and Excitation
System with the generators.
- The Excitaion system mainly comprises
of an Auto mode and a manual mode.
- In Auto Mode the system is built to
operate to work in solo mode / parallel
with Grid mode
- The Standard Excitation panel offers
the following features:
- Electronic AVR capable of maintaining
voltage regulations within ± 0.5%.
- Manual mode with hand operated variac
- Auto mode with motorised potentiometer
along with local / remote selector
switch.
- Quadrature droop feature for parallel
operation with other generators.
- Overfluxing protection.
- Diode Failure indicator.
- Field Flashing facility.
- Exciter field Voltmeter, Ammeter
and Generator volt meter.
- Indicating bulbs for Excitation
ON / OFF, Manual mode ON, Auto Mode
ON.
The
following Special Features are also offered
whenever called for :
- Automatic Power Factor Controller for
Grid
- Minimum Excitaion and Maximum Excitation
limiter.
- Smooth and Automatic changeover from
Auto to Manual with the help of Auto Tracking
Unit.
- Null Balance Meter for changeover from
Manual mode to Auto mode.
- Over Excitation and Under Excitation
Relay.
- Over Voltage Relay.
- Additional Auto Channel.
|
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