Invention Grant
US08013613B2 Voltage indicator test mechanism 有权
电压指示器测试机构

Voltage indicator test mechanism
Abstract:
An electrical safety monitor includes line inputs for an L1, an L2, an L3, and a GND three-phase connections, a line monitoring circuit having a plurality of light indicators and configured to produce light if voltage exists between any two of the line inputs to thereby indicate presence of voltage to a user, and a current generating circuit electrically connected to the line monitoring circuit and adapted to generate a test current to the line inputs to transition the device from dead to live thereby allowing the user to discern between a failure state of the line monitoring circuit and an off state of the line monitoring circuit. The current inducing circuit can include a magnet which induces the test current, stored energy, a photocell, an electroactive material or other means for generating the test current.
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