Voltage transformer

JDZX10-10 10kV Single-Phase Voltage Transformer

The JDZX10-10 10kV Single-Phase Voltage Transformer is a high-performance, epoxy-cast transformer designed for precise voltage measurement, energy metering, and relay protection in 10kV power systems. With excellent insulation, compact design, and reliable performance, it ensures safe and accurate operation in harsh environments.

Primary Voltage10kV
Secondary Voltage100V (standard)
Residual Voltage Winding100/3V
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Description

The JDZX10-10 Voltage Transformer is a single-phase, epoxy-cast transformer equipped with a residual voltage winding. It is ideal for 10kV power systems operating at 50Hz or 60Hz and is widely used for voltage measurement, energy metering, and relay protection applications.

Model Meaning

  • J – Voltage Transformer

  • D – Single-phase

  • Z – Epoxy-cast insulation

  • X – With residual voltage winding

  • 10 – Design number

  • 10 – Rated voltage (10kV)

Technical Specifications

  • Primary Voltage: 10kV

  • Secondary Voltage: 100V (standard)

  • Residual Voltage Winding: 100/3V

  • Frequency: 50Hz or 60Hz

  • Accuracy Classes & Rated Capacity:

    • 0.2 – 50–100VA (high-precision metering)

    • 0.5 – 100–200VA (general measurement)

    • 3 – 200–400VA (relay protection)

  • Insulation Levels:

    • Primary-to-ground: 12/42/75kV (rated voltage / short-time withstand / lightning impulse)

    • Secondary-to-ground: 3kV, 1 min

Structural Features

  • Compact & Durable: Single-phase, epoxy-cast structure offers moisture, dust, and corrosion resistance.

  • Winding Design: High-strength insulated primary winding; secondary and residual windings are fully isolated for accuracy and reliability.

  • Housing: Smooth, weather-resistant epoxy resin shell for long-term durability.

Installation & Usage

  • Inspect for physical damage and verify nameplate parameters.

  • Measure insulation resistance: primary ≥ 1000MΩ, secondary ≥ 10MΩ.

  • Can be installed inside switchgear or on a dedicated mounting bracket.

  • Ensure secure mounting with correct alignment; connect high-voltage and secondary circuits properly.

  • Do not short-circuit secondary winding; residual voltage winding must be grounded during normal operation.

  • Perform regular operational checks and preventive tests (insulation resistance, dielectric loss, voltage withstand).

Maintenance & Inspection

  • Daily: Clean surface, tighten terminals, check secondary circuit fuses.

  • Routine Inspection: Every 3–5 years for full maintenance including visual inspection and electrical testing.

  • Replace damaged components and verify performance.

Transportation & Storage

  • Avoid severe vibration, collision, and inversion during transport; use proper packaging.

  • Store indoors in a dry, ventilated area at -25°C to +40°C with humidity below 85%.

  • Periodically inspect appearance and insulation condition during storage.

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