CHAPTER 5: SETTINGS
GROUPED ELEMENTS
M60 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
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5
GROUND TOC1 SIGNAL SOURCE
— This setting selects the signal source for the ground time overcurrent protection element.
GROUND TOC1 INPUT
— This setting selects how ground current input quantities are interpreted by the M60. Inputs can be
selected as fundamental phasor magnitudes or total waveform RMS magnitudes as required by the application.
GROUND TOC1 PICKUP
— This setting specifies the ground time overcurrent pickup level in per-unit values.
GROUND TOC1 CURVE
— This setting selects the inverse time overcurrent curve style.
GROUND TOC1 TD MULTIPLIER
— This setting specifies a multiple of the base curve shape specified by the
CURVE
setting.
Programming this value to zero results in an instantaneous response to all current levels above pickup.
GROUND TOC1 RESET
— The “Instantaneous” reset method is intended for applications with other relays, such as most static
relays, which set the energy capacity directly to zero when the current falls below the reset threshold. The “Timed” reset
method can be used where the relay must coordinate with electromechanical relays.
GROUND TOC1 BLOCK
— Assertion of the operand assigned to this setting blocks operation of the ground time overcurrent
element.
GROUND TOC1 EVENTS
— This setting enables and disables the logging of ground time overcurrent events in the sequence
of events recorder.
Figure 5-140: Ground TOC1 logic
5.7.8.4 Ground instantaneous overcurrent (ANSI 50G, IEC PIOC)
SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
GROUND CURRENT
GROUND IOC1(12)
These elements measure the current that is connected to the ground channel of a CT/VT module. The conversion
range of a standard channel is from 0.02 to 46 times the CT rating.
This channel can be also equipped with a sensitive input. The conversion range of a sensitive channel is from 0.002
to 4.6 times the CT rating.
GROUND IOC1
GROUND IOC1
FUNCTION: Disabled
Range: Disabled, Enabled
GROUND IOC1 SIGNAL
SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
GROUND IOC1
PICKUP: 1.000 pu
Range: 0.020 to 30.000 pu in steps of 0.001
GROUND IOC1 PICKUP
DELAY: 0.00 s
Range: 0.00 to 600.00 s in steps of 0.01
Summary of Contents for M60
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