SPECIFICAITON OF 23KV COMBINED CT PT TRANSFORMER Model: CCPT -23 Standard:IEC 61869-1&2&3&4Instrument transformers.CFE VE100-29
3. Working Condition
3.1 The highest voltage for equipment / frequency:25.8kV
3.2 Frequency: 60Hz
3.3 Working Temperature:-40ºC~+40ºC
3.4 Three phase,Outdoor
3.5 Creepage distances: ≥28mm/Kv
3.6 Wind Speed :120km/h
3.7 Sea Level :≥2500m
4. Application
Applicable to the frequency of 60Hz, the highest voltage of 24kV, which is used for measurement and protection., suitable for pole mounted ,outdoor
5. Main technical requirements
5.1 Wiring connecting diagram
5.2 Parameter sheet
5.2.1 data of voltage transformerRated primary voltage (V)Rated primary voltage(V)AccuracyRated Burden(VA)Voltage factorVAth(VA)Rated insulation level(kV)144001200.2501.2Un/continue
1.9Un/8h50024/50/125 kV
Ext.BIL:150kV5.2.2 data of current transformerRated
ratioRated load
(VA)AccuracyIcthIth(kA/1s)Idyn(kA)Rated insulation level(kV)10/5A,50/5A
200/5A100.2S200%80xIpr2.5xIth24/50/125 kV
Ext.BIL:150kV5.3 Withstand requirement: (installation site should be not more than 1000m under standard pressure )
5.3.1 Inductive withstand voltage: Pri.-Sec. &Ground 50kV/40s@180Hz,
5.3.2 Power frequency withstand voltage: Sec.-Sec. &Ground 3kV/1min, N earth terminal - Sec. &Ground: 3kV/1min
5.4 Insulation resistance test
Pri.-Sec. &Ground: ≥1000MΩ/DC2500V, Sec.-Sec. &Ground: ≥500MΩ/DC2500V
5.5 Partial discharge: meet standard IEC61869-1:2007
6.Dimension
Fig.1 Outline dimension