| Distribution System
Service Voltage
Primary distribution voltages are mainly 34.5 kV wye grounded, 13.8 kV delta, 13.2 kV wye grounded, 8.3 kV wye grounded, 6.24 kV wye grounded and 4.8 kV delta. Utilization voltages are 230 volts single-phase or three-phase and 460 volts. System frequency is 60 Hz.
Power Supply
Power is received at 230 kv and 115 kv at 25 major delivery points and delivered to the customers through the 34.5 kv, 13.8 kv and 6.24 kv & below distribution systems.
Power Network
A total of 118 substations with a combined capacity of 13,072.76 MVA distribute power through its 15,605.98 circuit kilometers of subtransmission and distribution lines.
The 118 substations consist of the following:
- 7 Subtransmission
- 75 Major Distribution
- 36 Distribution
Distribution is predominantly an overhead radial system with provision for interconnection, but there are pockets of underground and secondary network systems.
Power System Data
| Lines |
Number of Circuits |
| Subtransmission (115kV & 69kV) |
88
|
| Distribution (Primary) |
705 |
Total |
793 |
| Substations |
Number |
Total Capacity (MVA) |
| Subtransmission
|
7 |
2,750 |
| Major Distribution |
75 |
9,403.29 |
Distribution |
36 |
919.47 |
| Total |
118 |
13,072.76 |
|
Transformers |
Number |
Total Capacity (MVA) |
| Power
|
211 |
13,072.76 |
|
Distribution |
143,947 |
11,668.07 |
|
