Product Application
This product is a three-phase five-column voltage transformer designed by the State Grid standard. It adopts the
4PT anti-ferromagnetic resonance principle. When the system has grounding faults of varying degrees, no resonance will occur, and it can run for a long time. The primary terminal is used in conjunction with the American 200A largediameter shaft type, and a special fuse is installed in the plug. It is used in indoor AC 50 or 60Hz, rated voltage 20kV power system to provide 220V power supply, voltage measurement and zero-sequence protection.
Implementation Standards
GB20840.3-2013
Conditions of Use
● Ambient temperature between -40℃ and 70℃, with a daily average temperature not exceeding 35℃.
● No significant dust, smoke, corrosive gases, steam, or salt contamination.
● Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%.
● Altitude not exceeding 1000 meters.
Wiring Diagram
Technical Parameters Table
| Model | Rated Voltage Ratio (kV) | Accuracy Class and Accuracy Class Combination | Rated Secondary Output (VA) | Thermal Limit Output (VA) | Rated Insulation Level (kV) |
| JSZWF-20R | 20/√3/0.1/√3/0.1 | 3/6P(3P) | 3X500/100 | 3×600 | 24/65/125 |
| JSZWF-20R | 20/√3/0.1/√3/0.22/√3/0.1 | 0.5/6P(3P) | 3X30/3X300/50 | 3×300/300/3×300 | 24/65/125 |
| JSZWF-20R | 20/0.1/0.22/0.1 | 0.5/6P(3P) | 3X25/3X300/100 | 3×300/3×300/3×500 | 24/65/125 |
Dimensional Drawing
Keywords
Three-phase five-column anti-resonance voltage transformer for ring main unit
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Category
Product Application
This product is a three-phase five-column voltage transformer designed by the State Grid standard. It adopts the
4PT anti-ferromagnetic resonance principle. When the system has grounding faults of varying degrees, no resonance will occur, and it can run for a long time. The primary terminal is used in conjunction with the American 200A largediameter shaft type, and a special fuse is installed in the plug. It is used in indoor AC 50 or 60Hz, rated voltage 20kV power system to provide 220V power supply, voltage measurement and zero-sequence protection.
Implementation Standards
GB20840.3-2013
Conditions of Use
● Ambient temperature between -40℃ and 70℃, with a daily average temperature not exceeding 35℃.
● No significant dust, smoke, corrosive gases, steam, or salt contamination.
● Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%.
● Altitude not exceeding 1000 meters.
Wiring Diagram
Technical Parameters Table
| Model | Rated Voltage Ratio (kV) | Accuracy Class and Accuracy Class Combination | Rated Secondary Output (VA) | Thermal Limit Output (VA) | Rated Insulation Level (kV) |
| JSZWF-20R | 20/√3/0.1/√3/0.1 | 3/6P(3P) | 3X500/100 | 3×600 | 24/65/125 |
| JSZWF-20R | 20/√3/0.1/√3/0.22/√3/0.1 | 0.5/6P(3P) | 3X30/3X300/50 | 3×300/300/3×300 | 24/65/125 |
| JSZWF-20R | 20/0.1/0.22/0.1 | 0.5/6P(3P) | 3X25/3X300/100 | 3×300/3×300/3×500 | 24/65/125 |
Dimensional Drawing
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