ADVANCED OPERATION - Section 5
5-10 MTS-3000 SERIES OPERATION AND REFERENCE MANUAL
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External Input specifies that reclosure will be initiated from the protective relays "close" signal connected
to a input trigger on the Digital I/O module. Refer to Section 5.7 for information on programming a Digital
I/O input.
Internal option allows up to six reclose shots of individually specified time delays to be programmed.
Meas’d Times (Measured Times) displays the times at which each trip and reclosure occurred during the
programmed reclose sequence. This can be useful since the main timer on the Control module display can
only display a single time.
5.2.10 Fault Incidence Angle
(FIA)
FIA allows the user to specify the Fault Incident Angle at which a fault is initiated. By default, a
programmed fault output appears shortly after a manual or external fault initiate trigger is applied. This
means that the point on the AC waveform at which the output begins will vary from test to test. For high-
speed electronic relays that use zero-crossing information to determine tripping criteria, random point-on-
wave fault applications can result in up to eight milliseconds variation in trip time. Specifying the Fault
Incident Angle with this option will ensure all faults initiate at the same point on the waveform.
5.2.11 Maximum Fault Duration
(Max Flt Dur)
This option allows the user to specify the precise time duration of fault output. It can be useful in situations
such as verifying the pickup level of one zone of a multi-zone impedance relay where other more sensitive
zones which operate the same output trip terminals have time delayed operation. By setting the fault
application time to be less than the time delay of the more sensitive zones, one can quickly determine the
operate level of the less sensitive zone.
5.2.12 Display Options
This option allows the user to select from a list of optional display modes for the control module display.
For example, selecting the ‘Impedance’ option changes the 2
nd
line of the CM display from Frequency to
Impedance.
5.2.12.1 DEFAULT DISPLAY
(Hz &
φφφφ
)
This is the default power-up display mode. Frequency is displayed on line 2, and the faulted voltage to
current phase angle is displayed on line 3.
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