ABB REB500 Operation Manual page 66

Section 3
HMI500
3.6.7.3
58
• Number of records "n": The maximum recording time available is divided by
this setting into "n" equal time periods. For example, assuming 3 records have
to be made for a sampling frequency of 2000Hz, then 13.33 seconds each can
be recorded.
• Acquisition time: This setting determines how much time before the triggering
point is included in the record. The recording time must be at least 0.2 s to
record the pre-fault and 0.3s for the post-fault history.
Central Unit
The following disturbance recorder settings can be made (see Figure 46).
• Number of records "n": The maximum recording time available is divided by
this setting into "n" equal time periods. For example, assuming 3 records have
to be made, then 6.67 seconds each can be recorded.
• Acquisition time: This setting determines how much time before the triggering
point is included in the record. The recording time must be at least 0.2 s to
record the pre-fault and 0.3s for the post-fault history.
Signals
Bay Units
All binary signals (input, output or internal signal) can be recorded. For this
purpose, they must be configured for recording and identified by their signal labels.
Up to 32 binary signals per bay can be selected for recording. Of these, up to 12
can be configured to trigger the start of recording. Triggering can take place on the
lagging or leading edge of a signal. If "both edges" is selected, both lagging and
leading edges are active (see Figure 47).
Once recording has been started, the complete recording period that has been set is
recorded.
In addition to the normal bay unit binary signals, there are up to ten general
purpose input signals that can be configured for recording and for triggering the
disturbance recorder ("16705... 16750_Start DR_x").
Central Unit
Some binary output signals can be recorded (see Table 13). For this purpose, they
must be configured for recording and identified by their signal labels.
Up to 64 signals can be selected for recording. Triggering can take place on the
lagging or leading edge of a signal. If "both edges" is selected, both lagging and
leading edges are active (see Figure 47).
1MRK 500 124-UEN
Operation Manual
Distributed busbar protection REB500