PLS-24 similar with ABB SFG an indoor high-voltage SF6 load switch, an switchgear with the rated voltage of 24kV, adopted with SF6 gas as an arc-extinguishing and insulation medium, including the three contactors for switching-on and switching-off and to-ground, and is characteristic in its small volume, its convenient installation and operation and its the great adaptability with surroundings.
There are two kinds of load break switch for PLS-24 (K type single spring-operated spring mechanism) and PLRS-24 ( A type double-spring operated mechanism). PLRS-24 can be formed into switch-fuse combination and with control function. PLS-24 of an indoor high-voltage SF6 load switch and PLRS-24 load switch plus fuse combination are complied with the standards of GB3804-1990, IEC60256-1,1997, GB16926,IEC60420 etc.
Service conditions:
a) Air temperature
Maximum temperature: +40℃; Minimum temperature:-35℃
b) Humidity
Monthly average humidity 95%; Daily average humidity 90% .
c) Altitude above sea level
Maximum installation altitude: 2500m
d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
e) No frequent violent shake
Technical datas:
| No | Item | Unit | PLS-24D/T630-20 Load break Switch | PLRS-24D/T125-50 Switch-fuse combination |
| 1 | Rated voltage | kv | 24 | 24 |
| 2 | Rated frequency | Hz | 50 | 50 |
| 3 | Rated current | A | 630 | 125 |
| 4 | 1 min power frequency withstand voltage phase to earth, phase to phase/across the isolating distance | kv | 50 | 50 |
| 5 | (Peak) lightning impulse withstand voltage phase to earth, phase to phase/across the isolating distance | kv | 125/145 | 125/145 |
| 6 | 5 min Rated power frequency withstand voltage under zero voltage | kv | 24 | 24 |
| 7 | Rated thermal current 4s load break switch/ earthing switch | kv | 20/20 | 20/20 |
| 8 | Rated dynamic current load break switch/earthing switch (peak) | kv | 50/50 | 50/50 |
| 9 | Rated short-circuit making current | kv | 50/50 | 125/50 |
| 10 | Rated closed loop breaking current | A | 630 | / |
| 11 | Rated active load breaking current | A | 630 | / |
| 12 | Rated cable charging breaking current | A | 10 | 10 |
| 13 | Rated short-circuit breaking current | kv | / | 31.5 |
| 14 | Rated transfer current | A | / | 1400 |
| 15 | Fuse type | / | XRNT-24kV/125A* | |
| 16 | Fuse strike output energy | J | / | 1±0.5 |
| 17 | Mechanical life load break switch/earthing switch | Times | 5000/2000 | 3000/2000 |
| 18 | Air insulation distance between live parts and to earth | mm | ≥125 | ≥125 |
| 19 | SF6 Gas pressure (20℃ relative pressure) | bar | 0.4 | 0.4 |
| 20 | Close-open synchronicity | ms | ≤2 | ≤2 |
| 21 | Main circuit resistance | µΩ | ≤65 | ≤65 |
SF6 Load Break Switch similar with ABB SFG:
SF6 load break switch accessories:
