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Help Center12/20kV Cold Outdoor Termination Structure Drawing
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Rated voltage UO/U (Um) KV |
6/10(12.5) |
8.7/15(17.5) |
26/35(40.5) |
Railway Uo=27.5 |
Test result |
|||
5min frequency voltage test |
no flashover, without breakdown under 4.5Uo |
no flashover, without breakdown |
||||||
1min frequency voltage under rain test |
no flashover, without breakdown under 4Uo |
no flashover, without breakdown |
||||||
Partial discharge at room temperature test |
discharge volume under 1.73Uo ≤10PC |
≤1.6pC |
||||||
Constant voltage load cycle in the air test |
heated 2.5Uo and conductor to a temperature to 95-100°C three times, no flashover, without breakdown |
no flashover, without breakdown |
||||||
Partial discharge at high temperature test |
heated cable conductor to 95-100C,discharge volume under 1.73Uo ≤10PC |
≤1.6pC |
||||||
Partial discharge at room temperature test |
discharge volume under 1.73Uo ≤10PC |
≤1.6pC |
||||||
Impulse voltage at high temperature test |
75 kV |
95 kV |
200 kV |
250 kV |
no flashover, without breakdown |
|||
heated cable conductor to 95-100°C,both positive and negative polarity 10 times, no flashover, without breakdown | ||||||||
Constant voltage load cycle test |
heated 2.5Uo and conductor to a temperature to 95-100°C sixty times, no flashover, without breakdown |
no flashover, without breakdown |
||||||
Partial discharge at high temperature test |
heated cable conductor to 95-100°C,,discharge volume under 1.73Uo ≤10PC |
≤1.6pC |
||||||
Partial discharge at room temperature test |
discharge volume under 1.73Uo ≤10PC |
≤1.6pC |
||||||
Impulse voltage test |
75 kV |
95 kV |
200 kV |
250 kV |
no flashover, without breakdown |
|||
both positive and negative polarity 10 times, no flashover, without breakdown | ||||||||
15min frequency voltage test |
no flashover, without breakdown under 2.5Uo |
no flashover, without breakdown |
||||||
Outdoor terminal salt spray test |
1.25 Uo,1000h,no flashover, without breakdown, no significant electrical corrosion and mechanical damage |
no flashover, without breakdown |
||||||
Indoor terminal wet test |
1.25 Uo,300h,no flashover, without breakdown, no significant electrical corrosion and mechanical damage |
no flashover, without breakdown |
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