T155
Gas-Insulated Substations up to 420 kV
GE's T155 GIS is a field-proven solution with high availability that meets the challenges of networks up to 420 kV for power generation, transmission, distribution, tertiary and heavy industry applications.
The T155 is compact and accessible, with a bay footprint 40% below the market average. Complete bays are assembled, wired, tested and shipped enabling shorter site works.
In addition, the T155 is environmentally friendly and features one of the lowest gas weights on the market along with an advanced SF6 sealing system. Full digital monitoring control and protection capabilities enable the T155 to be readily integrated into the smart grid
T155
Gas-Insulated Substations up to 420 kV
GE's T155 GIS is a field-proven solution with high availability that meets the challenges of networks up to 420 kV for power generation, transmission, distribution, tertiary and heavy industry applications.
The T155 is compact and accessible, with a bay footprint 40% below the market average. Complete bays are assembled, wired, tested and shipped enabling shorter site works.
In addition, the T155 is environmentally friendly and features one of the lowest gas weights on the market along with an advanced SF6 sealing system. Full digital monitoring control and protection capabilities enable the T155 to be readily integrated into the smart grid
Customer Benefits
Characteristics
Environment friendliness
- Low gas weight on the market
- First-in-class SF6 sealing system
High availability
- Best experience and reliability data
- Current transformers outside SF6
- Pure-spring circuit breaker drives
- State-of-the-art maintenance isolating device: major repair and HV tests with no more than 1 bay down
- Outstanding accessibility: drives and accessories at easy reach
Low costs of land and civil works
- Most compact GIS with single-phase enclosures only: bay footprint 40% below market average
Shortest site works
- Complete bays assembled,wired, tested and shipped (420 kV)
Smart grid features
- Full-digital monitoring, control and protection
Specifications
| GIS Type | T155 420 kV | |
| Reference electrotechnical standards | IEC/IEEE | |
| Rated voltage | 362-420 kV | |
| Withstand voltages | ||
| Short-duration power-frequency, phase-to-earth/across open switching device | 650/815 kV | |
| Switching impulse, phase-to-earth / across isolating distance | 1050/900(+345) kVp | |
| Lightning impulse, phase-to-earth / across open switching device | 1425/1425(+240) kVp | |
| Frequency | 50/60 Hz | |
| Continuous current | up to 5000 A | |
| Short-time withstand current | 63 kA | |
| Peak withstand current | 170 kAp | |
| Duration of short-circuit | 3s | |
| Installation | indoor/outdoor | |
| Ambient temperature range | down to -25/up to +55 °C | |
| CIRCUIT-BREAKER RATINGS | ||
| First-pole-to-clear factor | 1.3 - 1.5 | |
| Short-circuit breaking current | 63 kA | |
| Short-circuit making current | 170 kAp | |
| Operating sequence | O-0.3s-CO-3 min-CO/CO-15s-CO | |
| Drive type | Pure-spring | |
| Breaking time | 2 cycles | |
| Closing time | <115 ms | |
| Mechanical endurance | M2 class | |
| Capacitive switching | C2 class | |
| DISCONNECTOR AND LOW-SPEED EARTHING SWITCH RATINGS | ||
| Capacitive current switching | 0.5 A | |
| Bus-transfer current switching capability | 1600 A / 20 V | |
| Mechanical endurance | M2 class | |
| MAKE-PROOF EARTHING SWITCH RATINGS | ||
| Making current capability | 170 kAp | |
| Switching capability-electromagnetic coupling | 160 A / 10 kV | |
| Switching capability-electrostatic coupling | 18 A / 20 kV | |
| Mechanical endurance | M1 class | |
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