3.9.2 Binary input inversion
The parameter Input # invert is used to invert a binary input.
Table 48: Binary input states
Control voltage Input # invert State of binary input
No 0 False (0)
Yes 0 True (1)
No 1 True (0)
Yes 1 False (0)
When a binary input is inverted, the state of the input is TRUE (1) when no control
voltage is applied to its terminals. Accordingly, the input state is FALSE (0) when
a control voltage is applied to the terminals of the binary input.
3.9.3 Oscillation suppression
Oscillation suppression is used to reduce the load from the system when a binary
input starts oscillating. A binary input is regarded as oscillating if the number of
valid state changes (= number of events after filtering) during one second is equal
to or greater than the set oscillation level value. During oscillation, the binary input
is blocked (the status is invalid) and an event is generated. The state of the input
will not change when it is blocked, that is, its state depends on the condition before
blocking.
The binary input is regarded as non-oscillating if the number of valid state changes
during one second is less than the set oscillation level value minus the set
oscillation hysteresis value. Note that the oscillation hysteresis must be set lower
than the oscillation level to enable the input to be restored from oscillation. When
the input returns to a non-oscillating state, the binary input is deblocked (the status
is valid) and an event is generated.
Table 49: Oscillation parameter values
Parameter
Values Default
Input osc. level 2...50 events/s 30 events/s
Input osc. hyst 2...50 events/s 10 events/s
3.10 Binary outputs
The IED provides a number of binary outputs used for tripping, executing local or
remote control actions of a breaker or a disconnector, and for connecting the IED
to external annunciation equipment for indicating, signalling and recording.
1YHT530004D05 D Section 3
Basic functions
615 series 79
Technical Manual
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