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How should the shielding of the sampling cable of the intelligent low-voltage monitoring unit be grounded?

Time：2025-12-28 Views：523次

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The sampling cable shielding grounding adopts a single-point grounding principle: the shielding layer is grounded at the monitoring unit end, and the sensor end is left floating. Grounding method: 360° crimping to the housing via a shielded connector. For high-frequency interference, a 100nF/2kV capacitor can be connected in parallel at the grounding end. In multi-core cables, each twisted pair is individually shielded, and the overall shielding layer is grounded. The grounding resistance is less than 0.2Ω. With proper grounding, the shielding effectiveness is greater than 35dB.

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