Neutral Voltage Sensor - Eaton Power Xpert PXR Series Manual

function name
Trip alarm - Phase Loss
Alarm - Over Voltage
Alarm - Under Voltage
Alarm - Voltage Unbalance
Alarm - Current Unbalance
Alarm - Reverse Power
Alarm - Phase Reversed
Alarm - Phase Loss
Relay Default settings:
Relay #1 - if the trip unit has ARMS then this is programmed to be Maintenance Mode Active
Relay #1 - if there is no ARMS then this relay is programmed to be Alarm - ALL TRIPS
Relay #2 - if the unit is has ground fault protection - Ground Fault Alarm (pre alarm)
Relay #2 - if the unit has no ground fault protection – Alarm HighLoad1

5.4 Neutral voltage sensor

For applications with a neutral conductor external to the circuit breaker, a small module is
provided. This module has wire leads and must be used between the neutral conductor and
the voltage sensor input to the trip unit. The neutral voltage provides a reference to accu-
rately measure voltages in "Y" connected power system.
IMPORTANT: This module contains circuitry to reduce the line voltage to levels accepted by the
trip unit. Failure to use this module for neutral sensing may cause permanent damage to the
trip unit.
PXR tRiP units foR PoweR Defense molDeD case ciRcuit bReakeRs MN012007EN March 2019 www.eaton.com
Description of relay operation:
"the relay will close when..."
phase is less than 75% of other phases for longer than
pickup time (See setpoint Group 5 configuration)
voltage is greater than pickup for longer than the pickup
time (See setpoint Group 5 configuration)
voltage is less than pickup for longer than the pickup time
(See setpoint Group 5 configuration)
difference between the max and min voltages of all three
phases is greater than pickup for longer than the pickup
time (See setpoint Group 5 configuration)
difference between the max and min Current of all three
phases is greater than pickup for longer than the pickup
time (See setpoint Group 5 configuration)
reverse real power is greater than the pickup for longer
than pickup time (See setpoint Group 5 configuration)
phase reversed for >200ms (See setpoint Group 5
configuration)
phase is less than 75% of other phases for longer than
pickup time (See setpoint Group 5 configuration)
5 External wiring of the trip unit
"the Relay will open when..."
RESET button is pressed or communications reset command received.
voltage falls below the setpoint
voltage rises above the setpoint
min an max voltage difference are within pickup
min an max currents difference are within pickup
reverse power is less than the pickup
phase has been corrected
phase loss has been restored
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