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Click to enlarge image
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Additional Features
I. Bushing
- Porcelain bushing is standard. It is vertically mounted to the tank case. The inside bushing hole walls are treated with semi-conductive painting to shorten the gap between the copper stud and the bushing wall. This enables the switch to have good RIV characteristics and also good partial discharge control.
- Alternatively, epoxy bushing and silicon rubber boot is also available. Silicon rubber boot is put on the epoxy bushing to increase the voltage insulation and to protect inner bushing from external impact. We have both IEEE 386 and DIN cable connecting interface standard.
II. Bushing Terminal
- NEMA type flat bare terminal made of copper alloy is standard for bushing terminal. In accordance with local environments, customers can select Mold Cone and lead wire.
- Standard NEMA type flat bare terminal for Pollution Density 0.06 mg/cm2
- Optionally Mold cone and lead wire of insulated copper conductor is helpful for high pollution (Pollution Density 0.35 mg/cm2) and salt fog area.
- Insulation Cable filled with anti-water-penetration jelly together with bird-guard cap
III. Auxiliary Box
- Supplement magnetic actuator mechanism, relay and Protection PCB are located inside the Auxiliary Box attached underneath the tank case. These components are connected to the control unit through control cable.
Electrical Characteristics
Description |
PNC-RC-12/T630 |
PNC-RC-24/T630 |
Rated Maximum Voltage |
12 kV |
25.8 kV |
Rated Continuous Current |
630 A |
630 A |
Power Frequency Withstand Voltage
(dry-1min / wet -10sec)
|
42kV |
60 kV |
Lightening Impulse Withstand Voltage
(BIL) |
85 kV |
150 kV |
Rated Fault Making Capacity (peak) |
50 kAp |
32.5 kAp |
Rated Short Circuit Interrupting Current |
20 kA |
12.5 kA |
Mechanical/Electrical Operations |
10,000 times |
10,000 times |
Weight without Mounting Frame |
235 Kg |
265 Kg |
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