US 12,066,471 B2
Test system for an intelligent electronic device in an electric sub-station
Loganadhan V, Bengaluru (IN); Mahesh Ramachandra, Karnataka (IN); Manjunath AJ, Bengaluru (IN); and Shambhulingappa S, Karnataka (IN)
Assigned to HITACHI ENERGY LTD, Zürich (CH)
Filed by Hitachi Energy Ltd, Zürich (CH)
Filed on Aug. 21, 2023, as Appl. No. 18/236,315.
Application 18/236,315 is a continuation of application No. 17/607,608, granted, now 11,761,995, previously published as PCT/EP2020/061957, filed on Apr. 29, 2020.
Claims priority of application No. 201941016950 (IN), filed on Apr. 29, 2019; and application No. 19190551 (EP), filed on Aug. 7, 2019.
Prior Publication US 2023/0393175 A1, Dec. 7, 2023
Int. Cl. G01R 19/25 (2006.01); G01R 1/20 (2006.01); G01R 35/00 (2006.01)
CPC G01R 19/2513 (2013.01) [G01R 1/20 (2013.01); G01R 35/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A test system comprising:
a shaft configured to rotate around a longitudinal axis;
a lever coupled to the shaft; and
a test switch unit comprising
a first lead conductively connected to a first conducting element,
a second lead,
a second conducting element,
a primary contact element, having a first end and a second end, wherein the first end of the primary contact element is connected to the second lead, and the second end of the primary contact element extends away from the second lead and is biased to abut the first conducting element, thereby completing an electrical path from the second lead to the first lead,
a secondary contact element, having a first end and a second end, wherein the first end of the secondary contact element is connected to the second lead, and the second end of the secondary contact element extends away from the second lead and is biased to not contact the second conducting element, and
a cam mounted on the shaft and configured to rotate around the longitudinal axis with the shaft,
wherein the cam comprises a first profiled element and a second profiled element,
wherein the first profiled element is configured to engage with the secondary contact element to move the second end of the secondary contact element to contact the second conducting element,
wherein the second profiled element is configured to engage with the primary contact element to decouple the second end of the primary contact element from the first conducting element,
and wherein the first profiled element and the second profiled element are configured relative to each other, such that during rotation of the cam in the rotation direction, the first profiled element engages with the secondary contact element before the second profiled element engages with the primary contact element.