1. Description
CKFL SF6gas-insulated switchgear is a completely sealed & insulated medium
voltage ring main unit working in a voltage range maximum up to
24kV.
2. Technical Feature
---- Flexible expansion
---- Rustproof cabinet with high mechanical strength
---- Safe & reliable gas tank
---- Spring operating mechanism with anti-misoperation system
---- Fuse with sealed isolation
---- Simply and convenient connection
3. Working Condition
3.1 Altitude:≤1500m
3.2 Ambient air temperature: -35℃～+40℃
3.3 Max. average daily temperature: +40℃ Max. annual average
temperature: +35℃
3.4 Wind speed: ≤34m/s
3.5 Relative air humidity: ≤90% ( +25℃)
3.6 Ground gradient: ≤5°
3.7 Earthquake intensity: ≤magnitude 8
3.8 Applicable in the places without fire, without explosion risk,
without chemical corrosive and without violent vibration
(Exceeding above working condition is available as customized
product)
4. Technical Data
| Technical Data | Unit | Module C | Module F | Module V |
| Load switch | Switch-fuse combination | Vacuum switch | Disconnector/ earthing switch |
| Rated voltage | kV | 12 | 24 | 12 | 24 | 12 | 24 | 12 | 24 |
| Rated frequency | Hz | 50 | 50 | 50 | 50 |
| Rated current | A | 630 | 125 | 630 | 630 |
| Rated breaking cable charging current | A | 20 | 20 | / | / |
| Rated short-circuit making current(peak) | kA | 50 | Up to fuse | 50 | 40 | 50 | 40 |
| Rated short-circuit breaking current | kA | / | Up to fuse | 20 | 16 | / | / |
| Rated short-time withstand current | kA | 20 | / | 20 | 16 | 20 | 16 |
| Rated short-time withstand current duration(main circuit) | s | 4 | / | 4 | 4 | 4 | 4 |
| Rated short-time withstand current duration(ground loop) | s | 2 | / | / | / |
| Rated breaking transfer current | A | / | 1600 | / | / |
| Rated short-time power frequency withstand voltage | phase-to-phase phase-to-earth | kV/1 min | 42 | 50 | 42 | 50 | 42 | 50 | 42 | 50 |
| open contact | kV/ 1 min | 48 | 65 | 48 | 65 | 48 | 65 | 48 | 65 |
| Rated lightning impulse withstand voltage | phase-to-phase phase-to-earth | kV | 75 | 95 | 75 | 95 | 75 | 95 | 75 | 95 |
| open contact | kV | 85 | 110 | 85 | 110 | 85 | 110 | 85 | 110 |
| Mechanical life | times | 5000 | 5000 | 5000 | 5000 |
| Mechanical life of earthing switch | times | ≥2000 | ≥2000 | ≥2000 | ≥2000 |
| SF6 pressure in seal enclosure | Mpa | 0.040-0.045 | 0.040-0.045 | 0.040-0.045 | 0.040-0.045 |
| SF6 annual leakage rate | / | ≤0.02% | ≤0.02% | ≤0.02% | ≤0.02% |
5. Available modules options
● CKFL- □ / C-----Load switch module
● CKFL- □ / F-----Switch-fuse combination module
● CKFL- □ / V-----Vacuum-circuit breaker module
● CKFL- □ / D-----Direct incoming/outgoing cable module
● CKFL- □ / CL-----Busbar sectionalizer module(load switch)
● CKFL- □ / CvKr-----Busbar sectionalizer module(vacuum switch)
● CKFL- □ / PT-----Potential transformer module
6. Standard
---- IEC62271-1
---- IEC62271-100
---- IEC62271-200
---- IEC60265-1
---- IEC62271-102
---- GB/T11022
---- GB/T3804
---- GB/T1984, GB1985
