For 132/33kV, 24/27/30MVA Power Transformer
Bushing CT Detial (IEC-……)
Burden/ACC.
Rating (Rct @ 750C)
Detail
Core Terminal
Ratio
Qty
Application
Class
Vk >350V; Iex<25mA at Vk/4; Rct<3.0Ω
HV-Phase
1 1S1-1S2
200/1A
3
20VA/PS
Differential
Vk >350V; Iex<25mA at Vk/4; Rct<3.0Ω
HV-Phase
2 2S1-2S2
200/1A
3
20VA/PS
R.E.F.
Vk >350V; Iex<25mA at Vk/4; Rct<3.0Ω
HV-Phase
3 3S1-3S2
200/1A
3
20VA/PS
BACKUP
Iex: ….mA, Rct: …..Ω
HV-WTI
4 4S1-4S2
160/1A
1
20VA/0.5
Thermal Image
Vk >350V; Iex<25mA at Vk/4; Rct<3.0Ω
HV-Neutral
1 1S1-1S2
200/1A
1
20VA/PS
R.E.F.
Vk >350V; Iex<25mA at Vk/4; Rct<3.0Ω
HV-Neutral
2 2S1-2S2
200/1A
1
20VA/PS
BACKUP
LV-Phase
LV-Phase
LV-Phase
LV-WTI
LV-Neutral
LV-Neutral
1
2
3
4
1
2
Vk >350V; Iex<25mA at Vk/4; Rct<3.0Ω
1S1-1S2
800/1A
3
20VA/PS
Differential
Vk >350V; Iex<25mA at Vk/4; Rct<3.0Ω
2S1-2S2
800/1A
3
20VA/PS
R.E.F.
Vk >350V; Iex<25mA at Vk/4; Rct<3.0Ω
3S1-3S2
800/1A
3
20VA/PS
BACKUP
Ik: ….mA, Rct: …..Ω
4S1-4S2
640/1A
1
20VA/0.5
Thermal Image
Vk >350V; Iex<25mA at Vk/4; Rct<3.0Ω
1S1-1S2
800/1A
1
20VA/PS
R.E.F.
Vk >350V; Iex<25mA at Vk/4; Rct<3.0Ω
2S1-2S2
800/1A
1
20VA/PS
BACKUP
Rated Continuous thermal current rating = 200% of rated primary current