TBDG / ZF53-72.5 compact combined outdoor switchgear 40.5–126 kV (HGIS)
The TBDG and ZF53-72.5 series are compact modular outdoor HGIS switchgear for 40.5, 72.5 and 126 kV. The bay apparatus are placed in a common gas-filled enclosure and connected to the substation busbars by air bushings. The main applications are substations of solar and wind power plants, package substations and mobile substations.
- 126 kV
- TBDG-126: 2500 A, 40 kA / 4 s, peak 100 kA
- 72.5 kV
- ZF53-72.5: 1250/2500 A, 31.5 kA / 4 s, schemes 1L/2L/3L (one input to three outputs) for offshore wind farms
- 40.5 kV
- TBDG-40.5: 3150 A, 31.5 kA / 4 s
- Composition
- circuit breaker, three-position disconnector-earthing switch, CTs, bushings in a common aluminium enclosure
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Compared with a switchyard of separate apparatus, the combined apparatus takes much less space and requires less construction work. The busbars remain air-insulated, so much less SF6 is used than in full GIS. The modules combine flexibly for different schemes, the insulation is complete, no maintenance is needed and life-cycle cost is low. The enclosure has double sealing and carefully designed protection for outdoor installation.
The TBDG-126 is built with a three-phase switchgear cabinet in an aluminium alloy housing. Each phase includes a circuit breaker, a three-position disconnector-earthing switch, current transformers and bushings. The main circuit is connected through the bushings to the open busbars of the substation. Rated current 2500 A, breaking and short-time withstand current 40 kA for 4 s, peak withstand current 100 kA. The power frequency test voltage is 230 kV to earth and the lightning impulse is 550 kV. The electrical endurance of the circuit breaker is 20 interruptions. The apparatus is installed at solar and wind power plant substations, in the networks of petrochemical and metallurgical enterprises and in municipal utilities. This design is also suitable for prefabricated and mobile substations.
The ZF53-72.5 is a three-phase unit in a single enclosure for wind power plants. It combines circuit breakers, three-position disconnector-earthing switches, fast-acting earthing switches, current transformers and bushings. The main circuit is connected to the transformer, the internal grid lines and the submarine cable inside the wind turbine. A modular scheme with one input and one, two or three outputs (1L, 2L, 3L) adapts to different requirements. Rated current 1250 or 2500 A, short-time withstand current 31.5 kA for 4 s, peak withstand current 80 kA. For offshore wind farms the apparatus is more compact than traditional GIS.
The TBDG-40.5 at a rated current of 3150 A has a breaking current of 31.5 kA, a short-time withstand of 31.5 kA for 4 s and a peak withstand current of 80 kA. It is used in the reconstruction of rural networks, in package substations and in mobile substations. All apparatus of the range have an annual gas leakage below 0.1% and a mechanical endurance of 10,000 operations. The range covers the 40.5, 72.5 and 126 kV classes and handles tasks from a rural network to an offshore wind farm.
Technical specifications
| 126 kV | TBDG-126: 2500 A, 40 kA / 4 s, peak 100 kA |
|---|---|
| 72.5 kV | ZF53-72.5: 1250/2500 A, 31.5 kA / 4 s, schemes 1L/2L/3L (one input to three outputs) for offshore wind farms |
| 40.5 kV | TBDG-40.5: 3150 A, 31.5 kA / 4 s |
| Composition | circuit breaker, three-position disconnector-earthing switch, CTs, bushings in a common aluminium enclosure |
| Gas leakage | < 0.1% a year |
| Mechanical endurance | 10,000 operations |
Request a price and lead time
TBDG / ZF53-72.5 compact combined outdoor switchgear 40.5–126 kV (HGIS). We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8537 20 99 00 8537 20 91 00 |
|---|---|
| HS, 6 digits | 8537 20 |
| CN (EU) | 8537 20 99 8537 20 91 |
| HTSUS (USA) | 8537 20 00 00 |
| China customs tariff | 8537 20 10 00 8537 20 90 00 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
How does HGIS apparatus differ from full GIS?
The busbars remain air-insulated, so much less SF6 is needed. The bay apparatus in the gas-filled enclosure connect to the busbars through air bushings.
What currents does the TBDG-126 have?
Rated current 2500 A, breaking and short-time withstand current 40 kA for 4 s, peak withstand current 100 kA.
For which sites is the ZF53-72.5 intended?
The apparatus is installed inside wind turbines, including on offshore wind farms. Schemes 1L, 2L and 3L, rated current 1250 or 2500 A.
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