Low Pollution Gas SF6 Capacitor Voltage Transformer
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Low Pollution Gas SF6 110kV Voltage Transformer
1. Brief Introduction
·Guangdong Sihui instrument voltage transformers have a full range of indoor or outdoor, as well as single phase or three phases. Our voltage transformers are widely used in various switchgears of power grid, power plants, substations, railway, and coal mining industries and so on.
· For epoxy resin insulated low voltage and medium voltage VTs, we have fused type, V-connection type, plateau type, pole-mounted type and post type and so on; For high voltage VTs, we have SF6 inductive voltage transformer, SF6 capacitor voltage transformer and oil- immerged voltage transformer and so on.
2. Outline electrical parameters are as below
1).Primary voltage rating up to 1000 kV
2).Secondary voltage rating of 0.11kV, 230kV, 110/√3kV, 115√3kV or custom specified
3).Accuracy class up to 0.1 for metering; up to 3P, 5P for protection/relaying
4).Multi windings, up to 3 windings or more
5).Thermal limit outputs up to 2000 VA or custom specified
*Except for the parameters listed above, we can design as per clients’ requirements.
3. Main features
1).All outside parts, such as terminal box and mounting plate, are made of corrosion proof materials.
2).Low partial discharge 3).Matching different sizes switchgears 4).Used in voltage measuring and protection, high accuracy
5).Less maintenance and pollution free 6).Easily operated and mounted
7).High mechanical strength and high dielectric strength
5.Technical Parameters for TYDL 110/√3 - 0.01H SF6 Capacitor Voltage Transformers
5.1 Rated voltage 110/√3kV
5.2 Highest voltage for equipment 126kV
5.3 Rated frequency 50(60)Hz
5.4 Rated secondary voltage
a) Measuring secondary winding 0.1/√3kV
b) Protective secondary winding 0.1/√3kV
c) Residual voltage winding 0.1kV
5.5 Rated operating pressure of gas SF6 is 0.40MPa
5.6 Minimum operating pressure of the gas SF6 is 0.35MPa
5.7 Rated output and relative accuracy class (cosΦ=0.8 lag) see Table 1
Table 1 Rated Output and Relative Accuracy Class of Instrument Transformer
Residual Voltage Winding
Rated Output (VA)
A. The Windings quantity, rated output and accuracy listed above can be designed according to the requirements of the clients;
B. Thermal limit load of each protective winding is 2000 VA.
5.8 The system earthing mode is effectively earthed neutral system
5.9 Arcing distance ≥1160mm
5.10 Creepage distance of outer insulation see Table 2
Table 2 Creepage Distance of Outer Insulation
Pollution Protection Class
Creepage Distance (mm)
5.11 Rated capacitance (CN) of the capacitor divider is 0.01μF;
Rated capacitance (C1N) of the high voltage capacitor of the capacitor divider is 0.0189529μF;
Rated capacitance (C2N) of the intermediate voltage capacitor of the capacitor divider is 0.0211695μF.
5.12 The capacitance tolerance of the capacitor divider CN shall not exceed -5%~+10% of rated capacitance; the capacitance tolerance of the high voltage capacitor C1 shall not exceed -5%~+10% of rated capacitance; the capacitance tolerance of the intermediate voltage capacitor C2 shall not exceed ±5% of rated capacitance.
5.13 The voltage ratio of a capacitor divider shall not exceed ±5% of its rated value.
Notes: Detailed technical data and outline drawings can be provided upon request.