Instructional Literature
Page
154
Effective: May 2008
Instructions for the FP-6000 Protective Relay
For more information visit: www.eaton.com
IB02602004E
8.5.3 Operation (see Figure 51).
In general, if configured, the zone-out signal in a FP-6000 is
driven when the protective device is picked up on an
Instantaneous Over Current (IOC) or Inverse Time Over Current
(TOC) in the same direction as specified in zone interlock out
direction.
In particular, if the Zone Out setpoint is “Phase” then any phase
directional permissive phase current IOC or TOC pickup will
activate the zone out signal. Ground or residual current IOC or
TOC will not activate the signal.
If the Zone Out setpoint is “Ground” then any directional
permissive ground or residual current IOC or TOC pickup will
cause activation of zone-out signal. Phase current IOC or TOC will
not activate the signal.
If the Zone Out setpoint is “Both” then any directional permissive
phase, ground and residual current IOC or TOC pickup will cause
the zone-out signal to activate.
If the Zone Out setpoint is set to “Disable” then the zone-out
signal will not activate.
In general, if the Zone Interlocking Input is enabled, the absence
of a zone-in signal active, an IOC or TOC pickup occurs and the
fault direction is permissive, an immediate trip will occur. The
immediate trip has a 3-cycle pickup delay to make sure the
downstream devices have a chance to activate the zone interlock
signal. If the zone-in signal is active, then the programmed delay
time is used.
Figure 51. Zone Interlocking Example with FP-6000 and DT-3000.
