Niva outdoor compact substations are prefabricated metal outdoor enclosures with compact dimensions and low installation space. It can be easily located close to load centres.
Technical characteristics ensure trouble free operations and supply energy to the customers without interruption.
Wide range of variety the capacity up to 2.5 MVA voltage up to 33 KV, medium voltage compartment.
Niva robust compact substations are designed and manufactured to suit the tropical climate.
Sheet steel sections with weather-proof electrostatic coating, epoxy paint, GP sheet steel.
Valid for different types of distribution transformers.
Customize designs for special purposes are also available (container, mobile on truck, pad mounted/Skid mounted etc.).
Personal safety, minimum maintenance, simple installation and reliability are our main features.
| General characteristics | |
|---|---|
| Ambient temperature At 1000-meter altitude |
Normal operating condition -5°C to 50°C +50°C or +60°C De-rating of MV and LV switchboards |
| Standard color | RAL 7032 |
| Installation | Outdoor |
| Compartmented | Yes |
| Type of ventilation | Natural |
| Optional degree of protection | MV and LV compartments transformer compartment IP 54 IP 23 (IP 34 on request) |
| Rated enclosure class | K10 |
| Applicable standard | IEC 62271-202 |
| Electrical characteristics | |||
|---|---|---|---|
| Rated Voltage (kV) | 12 | 24 | 33 |
| Rated Insulation level kV rms, 50 Hz 1 min. |
28 | 50 | 70 |
| Rated Insulation level kV impulse, 1.2/50 µs |
75 | 125 | 150 |
| Rated Frequency (Hz) | 50 | 50 | 50 |
| Rated current of MV switchgears/CB's(A) | 630 | 630 | 630 |
| Max, allowable short time current withstand kArms-1s |
21 | 16/21 | 25 |
| KA peak | 52.5 | 40/52.5 | 62.5 |
| Max. LV current (A) | 4000 | 4000 | 4000 |
| LV current withstand (kA) | 50/65 | 50/65 | 50/65 |
