How is power distributed from 11kV to 415V in a Typical Industrial Substation?
A power distribution system SLD for an 11kV to 415V substation illustrates the entire flow of electrical power: from the 11kV incoming supply through HT protective devices to the 3500 kVA OLTC transformer & finally into the LT distribution network.
The illustration below demonstrates a typical industrial substation configuration intended for safe, dependable and efficient power transmission.
This schematic has all essential components including
- VCB protection,
- CT/PT metering,
- IDMT relays,
- LT ACB incomer,
- Bus coupler interlocking
- PFI compensation system
for power factor management.
Important Features of SLD
11kV HT panel with VCB & numerical protection relays
3500 kVA ONAN oil-filled transformer with OLTC
5000A LT ACB The main incomer uses CT-based metering while the bus coupler has mechanical/electrical interlocking for safety.
A 2100 kVAR PFI (Power Factor Improvement) plant is used for reactive power control.
This SLD was designed to assure effective protection coordination, system reliability & high efficiency in medium-to-large industrial power systems.
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