Eaton Power Xpert PXR 10, Руководство пользователя

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2 Design
2.4 Trip reason indicator
PXR Electronic trip unit 01/21 MN012005EN www.eaton.com
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2.4 Trip reason indicator
PXR10
The PXR10 trip units are not equipped with any indicators.
PXR20
The PXR20 trip units are equipped with up to four trip-reason indicators at the
front. These indicators are marked
LONG , SHORT , INST and GND .
Table 7: PXR20 trip-reason indicators
Once the circuit breaker has tripped, the indicator will flash permanently if
auxiliary power (24 V DC power) is available. Alternatively, once the circuit
breaker has tripped, a standard portable battery pack (power bank) can be
used to temporarily supply auxiliary power via the Micro-USB connection of
the trip unit.
The indicators and the display can be reset to the OFF position by moving
the-toggle or using PXPM software to reset. If the circuit breaker does not
have any auxiliary power supply, the indicators will not be active.
The tripping message will also be stored in the event log of the PXR trip unit.
The following table lists the readout reasons that the indicators are able to
recognize and indicate.
Table 8: Trip-reason indicators
PXR25
The PXR25 indicates the trip reason via the LCD-display.
Trip unit LONG SHORT INST GND
MX ✓ – ✓ –
VX ✓ ✓ ✓ –
VX-T ✓ ✓ ✓ ✓
Indicator Description
LONG A overload- or overtemperature-induced shutdown has occurred.
SHORT The short-time delayed short-circuit protection has been triggered.
INST The instantaneous short-circuit protection has been triggered, or an inrush-current trip,
a high instantaneous trip or a maintenance mode trip has occurred.
GND An ground-fault trip has occurred.