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OBJECTIVES OF DYNAMIC BRAKING
The
Dynamic Braking Equipment is required to reduce
the run down time of the Generator. This is
achieved by shorting the stator phase terminals
of the generator (Once the unit is tripped)
by means of Dynamic braking switch.
STANDARDS
The switch conforms
to IEC-60129, IEC-62271-102, IEC-60298, IEC-60694
FEATURES
- High Operating Reliability
- Simple Maintenance and Inspection
- Simple and Reliable Driving
Mechanism
- Operable by both Motor and
Manual
- Operation by Bevel Geared
Motor, and there by smooth operation
- Tested in accordance with
the IEC
CONSTRUCTION
The
3 pole Switch shall consist
of frame and contact system comprising stationary
and mobile contacts. The switch is made out
of rigid framework, with provision for manual
operation through operating drive handle. The
Switch is equipped with Uni-directional Bevel
geared motor for motor operation associated
with control circuit and also has arrangement
for manual operation. These 3 pole Switch is housed inside Aluminum cubicle and
will be connected with Busduct Tap-off.
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Technical
Data
|
|
Rated Voltage |
24kV |
| No.
of Poles |
3
Poles |
| Rated
Current |
12500
A (continuous) |
| Rated
Frequency |
50
Hz |
| Rated
Short Time Current |
230
kA rms for 1 sec. |
| Rated
Peak Current |
575
kA |
| Power
Frequency Volatge (1min. Dry) |
55
kV |
| Impulse
withstand Voltage |
| a)
To Earth |
125
kV peak |
| b)
Between Open Contacts |
145
kV peak |
| Making
Current |
7000A
at 1000V |
| Auxiliary
Contacts |
12
NO + 12 NC |
| Motoring
Rating |
1
Phase, 115V\230V, 60/50 Hz, 0.37 kW |
| Type
of Enclosure/Cabinet |
Aluminum
Enclosure |
|
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