Product Application
This device is installed at the neutral point of the transformer in 220kV~500kV substations. It monitors the DC bias condition of the transformer by measuring the DC current in the neutral grounding lead.
Implementation Standards
GB/T 17626.2, Grade 4; GB/T 17626.4, Grade 4.
Technical Parameters
| Selection Range | Model | Rated Measurement Current | Rated Measurement Output | Measurement Range | Basic Error (%) | Linearity Error (%) | Zero Point Output Error (+25℃) | Working Principle | Power Supply Voltage | Response Time | Withstand Voltage | Operating Temperature | Outline Drawing |
| ±80A(DC) | FHD3 | ±80A (DC) | 12mA±8mA(DC) | 0 - ±80A (DC) | ≤±2% | ≤±0.5% | ≤0.2mA | DirectAmplification | 220VAC | ≤150ms | 2kV/50Hz/1min，5kV surge voltage | -20℃ - 75℃ | 23 |
Dimensions
Keywords
DC measuring device
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Product Application
This device is installed at the neutral point of the transformer in 220kV~500kV substations. It monitors the DC bias condition of the transformer by measuring the DC current in the neutral grounding lead.
Implementation Standards
GB/T 17626.2, Grade 4; GB/T 17626.4, Grade 4.
Technical Parameters
| Selection Range | Model | Rated Measurement Current | Rated Measurement Output | Measurement Range | Basic Error (%) | Linearity Error (%) | Zero Point Output Error (+25℃) | Working Principle | Power Supply Voltage | Response Time | Withstand Voltage | Operating Temperature | Outline Drawing |
| ±80A(DC) | FHD3 | ±80A (DC) | 12mA±8mA(DC) | 0 - ±80A (DC) | ≤±2% | ≤±0.5% | ≤0.2mA | DirectAmplification | 220VAC | ≤150ms | 2kV/50Hz/1min，5kV surge voltage | -20℃ - 75℃ | 23 |
Dimensions
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