FN12-12 indoor HV air load break switch is a 3-phase AC 50Hz 12kV indoor switch equipment.
♦ Installation way: front-mounted, side mounted, flip mounted;
♦ Operating mechanism: spring operating mechanism, manual type and electrical type available;
♦ Operation type: right operation and left operation;
♦ Application: indoor 12kv switchgear.
Environmental Conditions
♦ Ambient temperature: -25°C~+40°C;
♦ Altitude:
♦ Relative humidity: daily average
♦ Earthquake intensity:
♦ Pollution grade: II;
♦ Places without fire, explosion, chemical corrosion and serious vibration.
Main Technical Parameters
NO | Item | Unit | FN12-12D/6 30-20 | FN12-12RD/1 25-31.5 | ||
1 | Rated voltage | kV | 12 | 12 | ||
2 | Rated frequency | Hz | 50 | 50 | ||
3 | Rated current | A | 630 | 125 | ||
4 | 1min power frequency withstand voltage (Phase to earth, between poles, open contacts) | Phase-to-earth, phase-to-phase | kV | 42 | 42 | |
Isolating fracture | 48 | 48 | ||||
5 | Rated lightning impulse withstand voltage (Phase to earth, between poles, open contacts) | Phase-to-earth, phase-to-phase | kV | 75 | 75 | |
Isolating fracture | 85 | 85 | ||||
6 | Rated short time withstand current (thermal stability current) | Load break switch | kA | 20 | ||
Earth switch | 20 | |||||
7 | Rated short circuit duration ( thermal stability time) | Load break switch | s | 4 | ||
Earth switch | 2 | |||||
8 | Rated short circuit making current (peak) | kA | 50 | |||
9 | Rated breaking current | Active load breaking current | A | 630 | ||
Loop breaking current | 630 | |||||
5% active load breaking current | 31.5 | |||||
Cable charging current | 10 | |||||
No-load transformer capacity | kVA | 1250 | ||||
10 | Rated short circuit breaking current (limit current fuse) | kA | 31.5 | |||
11 | Rated transfer current | A | 1200 | |||
12 | Mechanical life | times | 2000 | 2000 | ||
13 | Striker output energy | J | 1±0.5 |
General Structure Drawing and Installation Size (unit: mm)
♦ FN12-12D (side-mounted left operation)
♦ FN12-12D (flip-mounted left operation)
♦ FN12-12RD (front side-mounted left operation)
♦ FN12-12RD (front flip-mounted left operation)