US 4,056,776 A · Combination of a thyristor connection and a test device

Abstract

A thyristor connection which includes a plurality of thyristors each parallel to a voltage divider and a test device for individual testing of the individual thyristors. The test device includes a feeding circuit and a device for measuring the leakage current in one thyristor. The voltage divider for each thyristor is provided with output terminals for connecting the feeding circuit across a part of the voltage divider during measurement. There is a measuring section in series with such part of the voltage divider for connection of the measurement device. The thyristor connection is provided with an outer voltage divider in parallel with the connection which is provided with an output for connection of a point of the voltage divider to a pole of the feeding circuit.

Claims8

Dependent claims

A combination comprising:

a plurality of serially connected thyristor devices, each said thyristor device including a voltage divider and each voltage divider being parallelly connected to an associated thyristor in each of said thyristor devices;
a test device for testing the individual thyristors in place in the serially connected thyristor devices and including a voltage source and means for measuring the leakage current in an individual thyristor;
and
said voltage divider of each thyristor device including first connection means for removable connection of said voltage source across at least a part of said voltage divider, a measuring section connected in series with said at least part of said voltage divider and second connection means for removable connection of said measuring section to said means for measuring.

1 more element

Dependencies are inferred from the claim text.

Combination of a thyristor connection and a test device

Life of this patent

Combination of a thyristor connection and a test device

Life of this patent

Abstract

Claims8