Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1991-05-20
1992-12-15
Strecker, Gerard R.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324546, 324547, 324726, 361212, G01R 3106, H02H 322
Patent
active
051720671
ABSTRACT:
Apparatus for testing a high voltage inductive coil such as a transformer winding applies a DC voltage to the coil and measures coil voltage and current from which its resistance can be calculated. A load resistor in a discharge circuit dissipates energy stored in the coil prior to test apparatus removal to reduce arcing for operator safety. Diode bridges in the discharge circuit provide a nonlinear resistance which increases with decreasing voltage and current to ensure rapid and complete discharge of the energy stored in the coil's magnetic field. A three position make-before-break switch includes first and third positions for respectively coupling the DC supply and the discharge circuit to the coil and an intermediate position for simultaneously coupling the DC supply and the discharge circuit to the coil for safely initiating coil discharge. The test apparatus is coupled to the transformer via two modified Mueller clips using only three conductors each and is adapted for use with a 12 volt automobile battery without removing it from the vehicle.
REFERENCES:
patent: 3526830 (1968-09-01), Azuma
patent: 3562902 (1971-02-01), Green
patent: 3659197 (1972-04-01), Alley et al.
patent: 3742346 (1973-06-01), Specht
patent: 3823369 (1974-07-01), Sinha
patent: 3932806 (1976-06-01), Kawada
patent: 4152640 (1979-05-01), Craig
patent: 4538771 (1985-09-01), Tardy
patent: 4658213 (1987-04-01), Finley
patent: 4746869 (1988-05-01), Schrag et al.
Commonwealth Edison Company
Do Diep
Strecker Gerard R.
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