Insulators type JO and JOR
Casting resin indoor insulator type JO aplication in switching stations, switch boards and others electrical equipments of AC for maximal rated voltege 12; 17,5; 24 kv; temperatures from -25°C to +90°C; humidity up to 90% and up to 2000m.
Insulator type JOR consists essentially of a capacitive voltage divider. It is an element (detection) of voltage indication systems cooperativly with indicator. Insulator JOR can be use as to cooperative with look relay to limit a risk hazard persons neither during normal nor during distarbed operation.
Type marking structure.
(according IEC 60273)
- JO – post insulator
- JOR – capacitive post insulator
- Po – failing load bending in Kn – 8 kN
- Up – dry lighting impulse withstand voltage in kV – accordingly 75; 95 and 125
Example: JOR 8-95 – capacitive insulator, failing load bending 8 kN; dry lighting impulse withstand 95 kV
Basic technical data in Table
Casting resin basic dates.
- Breakdown strenght: >18 kV/mm
- Comperative Tracking Index CTI > 600
- Thermal class – 155°C
Recommended torque (screw class 8.8).
- M12 – 60 Nm
- M16 – 145 Nm
- M20 – 290 Nm