S&C Instruction Sheet 681-530
9
Product Overview
Three-phase fault interrupters are designed for three-phase tripping. Single-phase tripping
is not possible with three-phase fault interrupters.
With single-phase fault interrupters, the overcurrent control can be programmed for
either single-phase trip/single-phase lockout or single-phase trip/three-phase lockout.
When set for single-phase trip/single-phase lockout the control will trip only the phase
experiencing an overcurrent condition.
Ground
,
Negative Sequence
, and
Sensitive
Earth
Fault
settings cannot be used in this trip mode.
When configured for single-phase trip/three phase lockout, the control will trip all
three phases when one phase experiences a fault. Only one set of phase overcurrent
settings can be selected.
Ground
,
Negative Sequence
, and
Sensitive Earth
Fault
settings can be selected.
The overcurrent control has three levels of access. All access levels can view the status
page, which includes the status of the control, load currents, settings, and firmware
version.
Table 1. Access Levels
Access Level
Description
admin
Can access the Time Overcurrent Phase Protection menus of Interrupter 1 and
Interrupter 2 and make settings changes .
Can access all Control Settings and make changes .
Can change admin password and user password .
Can clear Diagnostic and Trip Event Logs .
Can perform a trip test .
Can upgrade firmware .
Can perform a factory default reset .
user
Can access the protective settings menus of Interrupter 1 and Interrupter 2 and
make changes .
Can change only the user password .
Can clear Diagnostic and Trip Event Logs .
View button
Can view and clear Diagnostic and Trip Event Logs .
Trip Mode
User Access and
Privileges
