36～245 kV Inductive Voltage Transformer

JDCF, JDX—series voltage transformer, outdoor, oil-immersed inductive type, single phase, hermetically sealed, earthed, cascade-type voltage transformer with high accuracy and protective class secondary windings. Used for metering and relay protection, applying to highland area.

The voltage transformer consists of internal insulation parts, a porcelain insulator, oil, base, metallic bellows. The high-voltage windings are separated into two (or four) parts that are located on two poles of the core. The secondary windings are located in the lower pole of the down core. Three secondary windings are: metering, protective and residual windings. The core is designed to have low flux density. There is an oil drain plug in the base. A set of oil draining device is supplied for three transformers.

Main Technical Parameter
Highest voltage for equipment: 36--245kV
Power frequency: 50 or 60 Hz
Rated secondary voltage：100/√3V, 110/√3V
Rated secondary voltage for the earthing core: 100/3 V, 110/3 V or 100 V, 110V
Output of the metering class：100VA/0.2 ，150 VA /0,5
Output of the protection class：300VA/3P, 6P
Residual windings output：3P, 6P output: 300 VA
Ambient temperature: -40℃ to +40℃
Creepage distance: 25mm or 31mm/Kv
Partial discharge level: <10pC

Rated Insulated Level

Type	Highest system Voltage kV (r.m.s)	Power frequency withstand voltage kV (r.m.s)	lighting impulse test voltage kV (peak)
JDX-72.5	72.5	140	325
JDX -123	123	230	550
JDX -145	145	275	650
JDX -170	170	325	750
JDX -245	245	395	950