JDCF inductive voltage transformer

IntroductionThe JDCF inductive voltage transformer is an instrument transformer with oil-paper insulation and a tank-type structure. Its shell is made of cast aluminum alloy, with a stainless steel expander on top to release internal pressure. Most of the connections between the shell, flange, and base use sub-arc welding instead of bolts and other mechanical connections, ensuring reliable sealing performance and solving the issue of oil leakage in oil-immersed products.The middle part consists of a porcelain bushing, the bottom is the oil tank, and the body is placed inside. The body includes...

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Detailed Description
Product Encyclopedia

Introduction

The JDCF inductive voltage transformer is an instrument transformer with oil-paper insulation and a tank-type structure. Its shell is made of cast aluminum alloy, with a stainless steel expander on top to release internal pressure. Most of the connections between the shell, flange, and base use sub-arc welding instead of bolts and other mechanical connections, ensuring reliable sealing performance and solving the issue of oil leakage in oil-immersed products.

The middle part consists of a porcelain bushing, the bottom is the oil tank, and the body is placed inside. The body includes the winding and a capacitor pressure equalizing screen, which are integrated through bandaging.

Its advantages include a compact size, lightweight design, high load capacity, and stable dielectric loss. According to customer requirements, we offer two types of external insulation: porcelain and silicone rubber bushings.

Application

The JDCF inductive voltage transformer uses electromagnetic oil-paper insulation for outdoor applications and is a fully sealed product. It is used for voltage measurement, electric energy measurement, and as a relay protective device. It meets the standards GB 20840.3, IEC 61869-3, and IEEE C57.13, among others.

JDX6-40.5	40.5	50/60	95	200	-
JDCF-72.5	72.5	50/60	160	350	-
JDCF-126	126	50/60	230	550	GB/IEC: 10/30/50/75/100/120/150/200/300VA
JDCF-145	145	50/60	275	650	IEEE: 0.15Y/0.15MWXYZ/0.3MWXYZ/0.6MWXYZ/0.6ZZ/1.2ZZ
JDCF-170	170	50/60	325	750	-
JDCF-245	252	50/60	460	1050	-
JDCF-300	300	50/60	460	1050	-
JDCF-420	420	50/60	630	1425	-
JDCF-550	550	50/60	740	1550	-

Rated Parameters

Type	Rated Voltage Factor	Limit Output (VA)	Oil Weight (kg)	Total Weight (kg)	Dimension A (mm)	Dimension T (mm)	Dimension H (mm)
JDT-31.5	-	1000	30	180	320/360	1010±10	1260±10
JDX6-40.5	1.2/Continuous, 1.9/30S	1000	38	152	315	985±20	1265±20
JDCF-72.5	-	1000	50	240	450	1225±30	1510±30
JDCF-126	-	2000	60	344	450	1900±30	2180±30
JDCF-145	-	2000	60	350	450	1900±30	2180±30
JDCF-170	-	1000	60	370	450	2300±50	2580±50
JDCF-245	1.2/Continuous, 1.5/30S	1000	120	655	600	3180±50	3540±50
JDCF-300	-	1000	120	700	600	3180±50	3540±50
JDCF-420	-	1000	320	1600	600	5795±50	6350±50
JDCF-550	-	1000	360	1600	600	6395±50	7000±50

JDCF inductive voltage transformer – Reliable Oil-Paper Insulated VT for Outdoor Substations

JDCF inductive voltage transformer with cast aluminum housing and porcelain bushing

The JDCF inductive voltage transformer is a robust, oil-paper insulated instrument transformer designed for high-precision outdoor applications in transmission and distribution networks. Built with a fully sealed tank-type structure and a cast aluminum alloy housing, it features a stainless steel expander to manage internal pressure and prevent oil leakage—a common issue in traditional oil-immersed designs. Sub-arc welding replaces mechanical fasteners at critical joints, ensuring long-term sealing integrity even under harsh environmental conditions.

Equipped with either porcelain or silicone rubber external insulation based on customer needs, the JDCF series integrates a capacitor grading screen within its wound core assembly for uniform electric field distribution and stable dielectric loss. Its compact, lightweight profile supports easy installation while delivering high thermal and dynamic load capacity across voltage classes from 40.5kV up to 550kV.

Oil-paper insulated outdoor VT – engineered for decades of maintenance-free operation in exposed substations
Leak-proof cast aluminum transformer – advanced welding and expansion design eliminate oil seepage risks
High-accuracy metering voltage sensor – compliant with GB 20840.3, IEC 61869-3, and IEEE C57.13 standards

Each unit undergoes rigorous quality control and full-type testing to meet global performance benchmarks. With outputs up to 2000 VA and compatibility across 50/60Hz systems, the JDCF series is ideal for revenue metering, protective relaying, and power quality monitoring. Its reliability, compliance, and modular insulation options make it a preferred choice for utilities seeking durable, accurate, and future-ready voltage transformation solutions.