Prefabricated TNB Electric Transformer Substation for Electrical Grid Systems
Product Description
Voltage levels
• Typically used for medium voltage distribution up to around 12kV on the primary side.
• Step down voltage to 400V or 690V on the secondary side.
• Suitable for applications with transformer capacities up to around 1600kVA.
Design Specifications
• Enclosure protection rating of IP54 or higher to protect against dust and occasional splashing of water.
• Insulation class of at least E (140°C) for transformers and switchgear.
• Equipment and components meet IEC standards for electrical substations.
• Optional protective devices like surge arresters, instrument transformers, etc.
Temperature Control
• Natural or forced air cooling systems to dissipate heat from components.
• Temperature sensors to monitor ambient and internal temperatures.
• Temperature control units to regulate fan speeds, activate alarms, etc.
• Heat exchangers or liquid cooling for high ambient temperatures.
• Optional air conditioning for extreme conditions.
Operational Safety
• Integrated protection relays and circuit breakers for overcurrent, overload and short-circuit protection.
• Optional protective relaying for earth faults, over/under voltages, reverse power, etc.
• Islanding prevention to automatically disconnect from the grid during outages.
• Fire suppression systems and protective earthing.
• Alarms, indicators and control panels for monitoring and operation.
• Security measures like locking doors and intruder detection.
Specification
| Rated Voltage | 12/17.5/24kV | 36kV |
| Standard applicable | IEC 62271 – 202 (IEC 61330) | IEC 62271 – 202 (IEC 61330) |
| Normal ambient temperature | 40 ° C | 40 ° C |
| Maximum ambient temperature | 50 ° C | 50 ° C |
| Enclosure construction | Modular | Modular |
| Ventilation | Natural | Natural |
| Temperature class (Std.) | K 10 | K 10 |
| MV and LV compartment | IP 54 | IP 54 |
| Transformer compartment | IP 23 | IP 23 |
| Rated voltage (kV) | 12/24kV | 36kV |
| Power frequency (kV rms) | 28/50 | 70 |
| Impulse (kV p) | 75/125 | 170 |
| Rated frequency (Hz) | 50/60 | 50/60 |
| Rated normal current (A) | 630 | 630 |
| Breaking capacity (A) | 630 | 630 |
| Making capacity (kA) | 52.5 / 40 | 50 |
| Rated normal current (A) | 630 | 630 |
| Breaking capacity (kA) | 21/16 | 20 |
| Making capacity (kA) | 52.5 / 40 | 50 |
| Rated power (kVA) – oil type | 2500 | 2000 |
| Rated power (kVA) – Dry type | 2500 | 2000 |
| Rated secondary voltage (V) | 433 | 433 |
| Vector group | Dyn 11 | Dyn 11 |
| Tapping range | + 5 in steps of 2.5% | + 5 in steps of 2.5% |
| IP | Yes | Yes |
| Internal arc | Yes | Yes |
| Enclosure class | Yes | Yes |
| Impact test | Yes | Yes |
| Short circuit test on earthing | Yes | Yes |
Advantages
1.Excellent quality
2.24 hour service
3.Professional design
4.Advanced technique
5.Rapid delivery
Production Facilities
Engineering
1.Power generation plants
2.Substations
3.Commercial buildings
4.Data centers
5.Renewable energy systems
6.Transportation
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Prefab TNB Compact Substation for Electrical Grid Systems Images
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