IEC 62271, ANSI/IEEE Std C37, NEMA
ISO 9001, KEMA, CESI, CE, TUV, UL, ASTA
Seismic design, ETGI-1.020, IEEE Std 693, NCh2369
Structural design, ASTM A325, ANSI/AISC 360, AWS D1.1
High altitude correction per IEC 62271 & IEEE C37, ~ 5000m
Stationary Cast Aluminum Contact Base
Copper and Silver Moving Contact
Robust, Seamless Steel Pipe Base
Double Break Disconnector 126~363kV
GW7 | Unit | GW7-126 | GW7-145 | GW7A-252 | GW7-363 | |
Rated voltage | kV | 126 | 145 | 252 | 363 | |
Rated Frequency | Hz | 50\60 | 50\60 | 50\60 | 50\60 | |
Rated current | A | 1250~3150 | 2000~3150 | 3150~5000 | 3150~5000 | |
Rated short-time withstand current and duration | kA/s | 40/3 | 40/3 | 50/3, 63/3 | 63/3 | |
Rated peak withstand current | kA | 100 | 100 | 125, 160 | 160 | |
Rated short-time power frequency withstand voltage(rms) | To earth | kV | 230 | 275 | 460 | 510 |
Across Breaks | kV | 265 | 315 | 530 | 580 | |
Rated lightning impulse withstand voltage(peak) | To earth | kV | 550 | 650 | 1050 | 1175 |
Across Breaks | kV | 630 | 750 | 1200 | 1175+205 | |
Rated switching impulse withstand voltage | To earth | kV | - | - | - | 950 |
Across Breaks | kV | - | - | - | 850+295 | |
Switching capacitive current | A | 1 | 1 | 2 | 1 | |
Switching inductive current | A | 0.5 | 0.5 | 1 | 0.7 | |
Rated busbar transferring current | A | - | - | 2000 | 1600 | |
