1. Product Overview

2. Core Parameters

• Rated Primary Voltage: 10kV or 20kV
• Rated Secondary Voltage: 110V or 120V (AC)
• Rated Secondary Current: Maximum 1.5A (when the standard secondary voltage is 120V, the capacity is about 180VA)
• Accuracy Class: 0.2 or 0.5 (i.e., the error does not exceed 0.2% or 0.5%)
• Phase Error: ±0.1° (high precision class)
• Frequency: 50Hz / 60Hz
• Load Capacity: Usually supports open-circuit, short-circuit and parallel operation

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3. Product Features

• High Precision: Complies with IEC or IEEE standards, with minimal error, ensuring the accurate operation of relay protection devices.
• Compact Structure: Adopts an optimized internal structure design, with a relatively small volume, facilitating installation in space-constrained environments such as substations.
• High Protection Level: The shell is usually of a metal-enclosed structure, with a protection level of IP40 or higher, which can effectively prevent dust and moisture from entering.
• Strong Durability: Uses high-quality insulating materials and high magnetic permeability iron cores, enabling long-term stable operation in high-voltage environments.

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4. Structure and Composition

• Iron Core: Laminated with high magnetic permeability silicon steel sheets to provide the necessary magnetic field conversion efficiency.
• Primary Winding: Connected to the high-voltage power grid, responsible for inducing current and voltage.
• Secondary Winding: Outputs low-voltage signals, usually connected to voltmeters, relays or automatic control equipment.
• Insulating Bushing: Used to isolate high-voltage and low-voltage components to ensure safety.
• Terminals: Used to connect power supply and load, usually designed with an anti-misconnection structure.

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5. Application Fields

• Substations: Used to monitor the voltage of main transformers, high-voltage busbars, etc.
• Distribution Networks: Used for voltage monitoring and relay protection of power supply lines.
• Industrial Enterprises: Used for power system monitoring in large factories to protect key equipment from voltage fluctuations.
• Power Plants: Used for the measurement and protection of generator terminal voltage.

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6. Installation and Maintenance

• Installation: Usually installed in the voltage transformer box indoors or outdoors of the substation. During installation, it is necessary to ensure that the insulation between the secondary side (low-voltage side) and the primary side (high-voltage side) is intact, and the wiring is firm.
• Commissioning: After installation, primary and secondary linkage commissioning is required to ensure the accurate ratio between the secondary voltage and the primary voltage.
• Maintenance: Regularly check the tightness of the wiring, remove dust and corrosion, and check the insulating oil or dry-type insulation if necessary. As it is a primary equipment, frequent maintenance is usually not required.