, when motors are started. Terminal blocks and connecting devices must able withstand such conditions.13
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mV
Test specimen
VCC
VCS
ICS ICC
Measuring
point
Measuring
point
Measuring
point
WAGO Rail-Mount Terminal Block Systems
Technical Information
• Short-Time Withstand Current Test (Short-Circuit Withstand Capacity) per IEC/EN 60947-7-1
Apart from the rated current that can constantly applied electrical device, operation-related short peak currents consistently occur
in electrical installations, e. For example, the short-time with-
stand current test per IEC/EN 60947-7-1, through rail-mount terminal blocks must capable withstanding for one second the rated
short-time withstand current which corresponds 120 A/mm² its nominal cross section. Also, the event short circuit, high current can flow for short time until the
fuse element melts.g.wago.
During the short-time withstand current test,
the ground conductor rail-mount terminal
blocks are subjected three times for one sec-
ond each current load 120 A/mm².
.
The pass criterion for the test the voltage
drop (limiting value and constant measured
values)
