Instant Max Currents - DEMA 400 Series User Manual

On-screen tripping time, switch-off time and arc time are the time calculated from the position
inputs of the circuit breaker. The breaker numerator gives the number of tripping of the
breaker in total.
∑A IR, ∑A IS, ∑A IT values indicate the sum of currents that the circuit breaker is subjected
to per phase at the time of failure; ∑A IR, ∑A IS, ∑A
2 2 2
IT values give the sum of the squares
of these currents. The relevant values are specified to determine the life of the circuit breaker
in the catalog data of the circuit breakers. The screen where the cutter measurements are
monitored is as follows.
Cutter Measurements Display
4.2.14

Instant Max Currents

This screen shows the data and time of the highest currents of the device in I , I , I , I
R S T N
phases. This data can be reset with the 'Reset' button. Ani max. The display of the currents is
as follows
The display of Instant Max Currents is as follows;
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