ABB RELION 620 Series Technical Manual page 969

1MRS757644 F
8.2.1.1
8.2.1.2
620 series
Technical Manual
By default, the binary channels are set to record external or internal relay signals, for
example, the start or trip signals of the relay stages, or external blocking or control
signals. Binary relay signals, such as protection start and trip signals, or an external
relay control signal via a binary input, can be set to trigger the recording. Recorded
information is stored in a nonvolatile memory and can be uploaded for subsequent
fault analysis.
Recorded analog inputs
The user can map any analog signal type of the protection relay to each analog channel
of the disturbance recorder by setting the Channel selection parameter of the
corresponding analog channel. In addition, the user can enable or disable each analog
channel of the disturbance recorder by setting the Operation parameter of the
corresponding analog channel to "on" or "off".
All analog channels of the disturbance recorder that are enabled and have a valid
signal type mapped are included in the recording.
Triggering alternatives
The recording can be triggered by any or several of the following alternatives:
• Triggering according to the state change of any or several of the binary channels
of the disturbance recorder. The user can set the level sensitivity with the Level
trigger mode parameter of the corresponding binary channel.
• Triggering on limit violations of the analog channels of the disturbance recorder
(high and low limit)
• Manual triggering via the Trig recording parameter (LHMI or communication)
• Periodic triggering.
Regardless of the triggering type, each recording generates the Recording started and
Recording made events. The Recording made event indicates that the recording has
been stored to the non-volatile memory. In addition, every analog channel and binary
channel of the disturbance recorder has its own Channel triggered parameter. Manual
trigger has the Manual triggering parameter and periodic trigger has the Periodic
triggering parameter.
Triggering by binary channels
Input signals for the binary channels of the disturbance recorder can be formed from
any of the digital signals that can be dynamically mapped. A change in the status of a
monitored signal triggers the recorder according to the configuration and settings.
Triggering on the rising edge of a digital input signal means that the recording
sequence starts when the input signal is activated. Correspondingly, triggering on the
falling edge means that the recording sequence starts when the active input signal
resets. It is also possible to trigger from both edges. In addition, if preferred, the
monitored signal can be non-triggering. The trigger setting can be set individually for
each binary channel of the disturbance recorder with the Level trigger mode parameter
of the corresponding binary channel.
Section 8
Measurement functions
963