GE Industrial Solutions Entellisys 4.0 System Test Kit User Manual - Manual (Page 32)

System Test Kit 32
How trip time curve generated
For Overcurrent Protection test, three LT Points, three ST points, and two IOC Points are tested
for generating the Automatic Trip time curve. Overcurrent test points are considered as
multiples of LT pickup.
For Ground Fault Protection test, four points are tested when GFI2T curve is enabled and two
points when disabled. Ground Fault test points are considered in multiples of GF pickup.
Topology Selection Will display only when connected to Entellisys 4.0 lineups. Defaults to the
current operating topology.
Single point relays in Entellisys 4.0 and higher operate on 0-15 topologies
depending on the switchgear configuration. Each topology state may
have different settings. For example, topology 0 is reserved for Reduced
Energy Mode and topology 1 is normal operation.
After every test, the current topology should be verified in the breaker
status screen at the HMI as the system topology may change (due to
change in state of a topology breaker) and hence the settings will not be
valid and the test may fail.
Breaker Trip Specifies whether the test will physically trip the circuit breaker.
; – Circuit Breaker will Trip
† – Circuit Breaker will not Trip
Ground Fault Allows users to temporarily Defeat Ground Fault during the test, or to
Resume/Run Ground Fault as normal during the test. Ground Fault must
be defeated for single phase tests—otherwise a trip on Ground Fault will
occur.
; – GF will Resume/Run as Normal.
† – GF will be temporarily defeated during the test period.
Note: After the test has concluded, Ground Fault will resume
automatically.
This feature is enabled only when Ground Fault is enabled in the selected
circuit breaker.
Breaker Setting Table/Tabs Displays the actual settings for the circuit breaker selected. This is for
information only.
Select Curve Type Select one of two types of curves to generate—either “Overcurrent Trip
Time Curve” or “Ground Fault Trip Time Curve”. Operator selectable.
Fault Phase The phase(s) for fault injection. Operator selectable.
Options for LT, ST, IOC Test Selection: Phase A, Phase B, Phase C, Phase A &
B, Phase B & C, Phase C & A, Phase A, B & C
Option for GF Test Selection: Phase A, Phase B, Phase C, and Neutral
Automatic Trip Time Settings This table displays the amount of test kit voltages that will be injected with
respect to the calculated trip time curve.
Table 1-8 Test setup field description