4 Protection settings
4.7 Instantaneous release (override)
PXR Electronic trip unit 01/21 MN012005EN www.eaton.com 29
4.7 Instantaneous release (override)
The PXR trip unit is equipped with a high instantaneous trip function that will
trip the circuit breaker in line with the short-circuit rating of the circuit
breaker. The function will respond to the peak current level (this is a default
setting). This setting is always active, regardless of which settings have been
selected for the instantaneous short-circuit protection. It is controlled by a
secondary processor for redundant tripping. The INST indicator of the
instantaneous short-circuit protection indicates this type of trip reason.
4.8 Digital bypass
Should the main processor malfunction, the secondary processor will take
over at 1.2 x I
n
.
If the value exceeds 1.2 x I
n
, the circuit breaker will trip immediately.
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