| Customization: | Available |
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| Application: | Electronic, Instrument, Position Sensor, Audio, Lighting |
| Type: | Current Transformer |
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Voltage transformer, also known as potential transformer, is another crucial measuring and protective device in the power system. Its core function is to proportionally convert high voltage into standard low voltage for safe and accurate measurement and monitoring.
Applications:
Measurement: Provide input signals proportional to the primary voltage for voltmeters, energy meters, power meters, power factor meters, frequency meters, etc.
Protection: Provide a signal reflecting the voltage condition of the primary system to the relay protection device.
Synchronous parallel: Provide voltage signals from both systems for synchronous detection during generator grid connection or line loop closing operations.
Monitoring and Control: Provide voltage information in SCADA systems and automatic devices.
Insulation monitoring: used for ungrounded or grounded systems through arc suppression coils to monitor the insulation condition of the system to ground by measuring the open delta voltage or neutral point displacement voltage.
Features:
Voltage conversion: Convert high voltage to standard low voltage.
Electrical isolation: achieving electrical isolation between high and low voltage, strong and weak electricity, ensuring the safety of operators and instrument equipment.
Standardized output: The rated voltage on the secondary side is usually 100V (line voltage) or 100/√ 3 V ≈ 57.7V (phase voltage) and other standard values, allowing measurement and protection equipment to be standardized.
High precision: The PT used for measurement has a high level of accuracy, ensuring the accuracy of measurements such as voltage, power, and electrical energy. Its error requirements are strict.
Small capacity: mainly providing voltage signals, the load is usually the voltage coil of instruments or protective devices, and the required power is very small.
High impedance: The primary winding is connected in parallel in a high-voltage circuit, exhibiting high impedance and having minimal impact on the tested system.
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Rated voltage ratio(V)
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Maxoutput(VA)
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Rated insulation level
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3000/100/220
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600
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3.6/25/40
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6000/100/220
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600
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7.2/32/60
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10000/100/100
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600
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12/42/75
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