Positions of the Extra Cooling Fan in the Switchboard
- The CB-HVX (Circuit Breaker) and DS-UTX (Disconnector) units when uprated from 3150–4000 A.
- If the incomer is far from the coupler, additional cooling to be installed to cool the middle busbar or maximum at every four outgoing cubicles.
The activation of the middle fans shall follow the nearest 4000 A incomer.
|
Fans Over CB |
Fans Over CB |
Fans Over CB |
Fans Over CB |
Fans Over CB |
Fans Over CB |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
|
CB |
CB |
CB |
CB |
CB |
CB |
CB |
With UTX |
CB |
CB |
CB |
CB |
CB |
CB |
|
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
|
Incoming 4000 A |
Coupler 4000 A |
Riser 4000 A |
Incoming 4000 A |
|
Fans Over CB |
Fans Over CB |
Fans Over CB |
Fans Over CB |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
|
CB |
CB |
CB |
CB |
CB |
CB |
CB |
CB |
CB |
Without UTX |
CB |
CB |
CB |
|
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
|
Incoming 4000 A |
Coupler 4000 A |
Riser 4000 A |
Incoming 4000 A |
|
Fans Over CB |
Fans Over CB |
Fans Over CB |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
LV |
|
CB |
CB |
CB |
CB |
CB |
CB |
CB |
Without UTX |
CB |
CB |
CB |
CB |
CB |
CB |
|
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
Cables |
|
Incoming 4000 A |
Coupler 4000 A |
Riser 4000 A |
Incoming 4000 A |