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www.us-tech.com Production


Secure, Scratch-Free Testing of High-Voltage Plug Connectors


By Matthias Zapatka, CTO, INGUN USA


of connecting plugs. For safety reasons, they must be equipped with a protec- tion cover. This cover prevents unintentional contact that can be harmful to technicians and operators in the field.


W INGUN has introduced a


new, simplified test solution for the functional testing of power modules with integrated plug con- nectors, the HKF-615 high-cur- rent clamp. This high-current clamp provides scratch-free test- ing and also automatically expos- es the contact point on the connec- tor during measurement. First the clamp is docked,


See at SMT Hybrid Pkg., Booth 4A-458


the protection cover is released and then the cover is displaced, allowing clearance of the flat con- nector. The contacts that actually transmit the power are brought into position over the flat connec- tor in the same way. An electrical connection is made between the flat connector and the contact clip in the subsequent working position. Con- tacting itself occurs simultaneously through silver rivets with a large surface area, resulting in a secure current transmission of up to 225A.


Contacting a flat connector with a protection cover cap.


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RAMPF Group, Inc.


49037 Wixom Tech Drive l Wixom l MI 48393 USA T +1.248.295-0223 E info@rampf-group.com


www.rampf-group.com www.rampf-gruppe.de


the electrical contact is broken before the probe draws the protection cover back over the flat connec- tor and the test probe is returned to its home posi- tion. The contact is entire- ly scratch-free and is made in a single working step. This saves consider- able time and cost. Measurements made by a thermal imaging camera will reveal that the hottest point on the contact area is between the contact clamp and the unit under test (UUT). The current strength


is specified by the temper- ature profile. This profile stabilizes when the cur- rent is stable. At 225A, the difference of the atmos- pheric temperature is typi- cally 72°F (40°C) lower than the temperature of the clamp (DT = 40 K). Therefore, based on an atmospheric temperature of 69.8°F (21°C), a temperature of approximately 141.8°F (61°C) can be expect- ed. When a maximum permissible temperature is specified, the maximum current possible can then be determined. In a similar way, Kelvin measurements can be carried out. An electrical- ly insulated inner conductor, which enables a voltage tap directly on the UUT


INGUN HKF-615 contacting cycle.


is available from INGUN separately. Contact: INGUN USA, Inc., 252 Latitude Lane, Suite 105-106,


Lake Wylie, SC 29710 % 803-831-1200 fax: 803-656-5080 E-mail: mailbox@ingun.us Web: www.ingun.us r


ith the marked increase in the demand for electric vehicles, more manufacturers than ever are turning to hybrids. These hybrid elec- tric vehicles require high voltages and currents, requiring even more


May, 2018


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