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The Flowstik live-line direction of current flow meter measures the amplitude and direction of flow of the current in a high voltage conductor. The current is measured by SensorLink's patented Amp sensor. This sensor is based on magnetic field induction pickup. Magnetic field sensing is recognized as the most reliable method of sensing current, due to large signals and low noise coupling into the sensor. In order to satisfy Ampere's Law, the Flowstik design uses a special air core inductor configuration, which simulates the required closure.
A large U shaped inductor provides the primary magnetic field sensing, and small inductors near the opening of the sensor provide detection of the magnetic field moving in or out of the open part of the sensor and compensate for this leakage. The direction of current flow is determined by measuring the relative phase angles of the current and the voltage (E-Field). Contact with a bare conductor is required to measure the direction of current flow.
This instrument can be used remotely with any hotstick and universal chuck adapter. The instrument has no moving parts and does not require clamping onto the wire. The case is water-resistant and will withstand high physical impact. |
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