Introduction section1: general requirements
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- Open to sky (Private Panel – Dedicated Substation)
- DEWA Meter/Control room requirement for Direct 11kV Supply
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Area |
9.0 m2 | Minimum width of 3.0m towards door side. For one set of RMU controlling 2 Transformer | |
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7 m2 |
Extra space for every additional RMU set | ||
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10 m2 |
Extra space required for four and above transformer with minimum width of 5 m (additional equipment’s) | ||
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TRANSFORMER ROOM (Ground Floor) |
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Area |
21 m2 |
For 1x1000/1500 KVA transformer (minimum width of 4.57m) | |
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42 m2 |
For 2x1000/1500 KVA transformer (minimum width of 6.1m) | ||
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21 m2 |
Extra space for every additional transformer. | ||
Basement Substation (RMU room in Ground floor & Transformer room at basement level)
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RMU ROOM (Ground Floor) | ||
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Area |
9.0 m2 | Minimum width of 3.0m towards door side. For one set of RMU controlling 2 Transformer |
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7 m2 |
Extra space for every additional RMU set | |
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10 m2 |
Extra space required for four and above transformer with minimum width of 5 m (additional equipment’s) | |
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TRANSFORMER ROOM (Basement Floor) | ||
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Area |
21 m2 |
For 1x1000/1500 KVA transformer (minimum width of 4.57m) |
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42 m2 |
For 2x1000/1500 KVA transformer (minimum width of 6.1m) | |
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21 m2 |
Extra space for every additional transformer. | |
Open to sky (Private Panel – Dedicated Substation)
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Area |
6.1m X 6.1m |
(Open to sky) for 1x1000/1500KVA transformer & 1xRMU (Substation with extra-large kiosk) |
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Additional requirement | Substation space should be open to sky and to be directly located along RTA/Public Road or Sikka. LV Room must be adjacent to the substation room. The height of the compound wall around the substation should not be more than 2.1m Soak-away should be 3.66m (minimum) away from the substation. | |
Open to sky (Pocket Substation)
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Area |
4.57m X 3.66m |
(Open to sky) for 1 x 1000KVA |
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6.1m X 6.1m |
(Open to sky) for 2 x 1000KVA | |
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Additional requirement | Substation space should be open to sky and to be directly located along RTA/Public Road or Sikka. Substation’s side of size 4.57m or 6.1m should be along the RTA/Public road/service road. Substation is suitable for releasing supply through individual feeders, each of 400A (maximum rating). The height of the compound wall around the substation should not be more than 2.1m Soak-away should be 3.66m (minimum) away from the substation. | |
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DEWA Meter/Control room requirement for Direct 11kV Supply
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Area |
29.16 m2 (5.4 m X 5.4 m) | Regular type of RMU room made of block work and RCC slab for two numbers of 11kV feeders. For every additional feeder approximately 8m2 extra space required. |
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6.1m x 6.1m (open to sky) | Open to sky with FGRP kiosk (to be supplied by DEWA) for two numbers of 11kV feeders. For additional feeder same space required. The height of the boundary wall (3 sides) around the RMU foundation substation shall be not more than 2.1m |
11.5 Substation Ventilation for Ground Floor
Substation at ground floor must be naturally ventilated with minimum two sides ventilation with aluminum louver doors and fixed aluminum louvers.
Fixed aluminum louver window(s) should be at 0.6m above outside level.
Transformer room aluminium louver door size to be 3.05m x 2.75m (H). Door details ref. drawing nos. P-DS/DOOR/01/96 (Rev.’A’) and P-DS/DOOR/02/96 [Appendix 16 - 17]
RMU room aluminium louver door size to be 2.44m or 3.05m x 2.75m (H) [Appendix 16 – 17 ]
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