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US 2019/0162770 A1Published application
Electric leakage detection device
AssigneeNtn Corporation
InventorMasaji HANEDA
Life of this patent
Estimating the term…
Abstract
An electric leakage detecting device using a middle point grounding method in which detection current flowing in the resistors as well as sensitivity for detecting current is kept low.
Claims4
An electric leakage detecting device which is connected between a pair of power lines (L1, L2) comprising:
- a first resistor circuit (C1) having a first linear resistor device (R1) and a first constant voltage device (VR1) in serial connection with each other, said first constant voltage device (VR1) lowering its resistance value so as to maintain the end-to-end voltage thereof at a constant level when voltage exceeding a predetermined level is applied to said first resistor circuit (C1);
- and
- a second resistor circuit (C2) having a second linear resistor device (R2) and a second constant voltage device (VR2) in serial connection with each other, said second constant voltage device (VR2) lowering its resistance value so as to maintain the end-to-end voltage thereof at a constant level when voltage exceeding a predetermined level is applied to said second resistor circuit (C2);
- wherein said first resistor circuit (C1) and said second resistor circuit (C2) are connected between said pair of power lines (L1, L2) in a serial alignment and the connection point (N) between said first resistor circuit (C1) and said second resistor circuit (C2) is grounded.
1 more element
Dependencies are inferred from the claim text.