Browse Prior Art Database

Test Device for Electrical Safety And Power Supply Evaluations

IP.com Disclosure Number: IPCOM000120828D
Original Publication Date: 1991-Jun-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 1 page(s) / 29K

Publishing Venue

IBM

Related People

Vo, LX: AUTHOR

Abstract

Disclosed is an electronic test device which creates and controls a fault load on a tested electrical circuit. Test criteria are based on UL/CSA/IBM specifications and requirements which verify that, under a worse-case situation, IBM machines shall not cause smoke, flame, or combustion.

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Test Device for Electrical Safety And Power Supply Evaluations

      Disclosed is an electronic test device which creates and
controls a fault load on a tested electrical circuit.  Test criteria
are based on UL/CSA/IBM specifications and requirements which verify
that, under a worse-case situation, IBM machines shall not cause
smoke, flame, or combustion.

      The electronic test device is designed using Linear Function
theory to create a voltage source.  Transformation logic converts the
voltage source to a current source with a rate of 10 amps/second.
Electronic circuit applies power switching transistorsto turn on/off
voltage/current source while Linear and TTL logics integrate and
control slope and timing of the test waveform.

      Test set up includes using the test device as a control device,
a PS2L as an adjustable load, storage scope with dual channels to
record voltage and current waveforms, and the circuit under test.
The test device sends a control signal to an attached Programmable
Load PS2L, simulating a fault load of 10 amps/second on the circuit
under test. Voltage and current on the tested circuitry are
monitored, measured, and recorded for test evaluation and analysis.