ABB RES670 Technical Manual page 723

1MRK 511 408-UUS A
Phasor measurement unit RES670 2.2 ANSI
Technical manual
• Bit TP: the protection equipment has tripped during the fault
• Bit TM: the disturbance data are currently being transmitted
• Bit TEST: the disturbance data have been recorded during normal operation or test
mode.
• Bit OTEV: the disturbance data recording has been initiated by another event than
pick-up
The only information that is easily available is test-mode status. The other information
is always set (hard coded) to:
TP Recorded fault with trip. [1]
TM Disturbance data waiting for transmission [0]
OTEV Disturbance data initiated by other events [1]
Another information element in ASDU23 is the FAN (fault number). According to the
standard this is a number that is incremented when a protection function takes action.
FAN is equal to disturbance number, which is incremented for each disturbance.
ASDU26 / ASDU31
When a disturbance has been selected by the master by sending ASDU24, the
protection equipment answers by sending ASDU26, which contains an information
element named NOF (number of grid faults). This number must indicate fault number
in the power system,that is, a fault in the power system with several trip and auto-
reclosing has the same NOF (while the FAN must be incremented). NOF is just as
FAN, equal to disturbance number.
Interoperability, physical layer
Electrical Interface
EIA RS-485
number of loads
Optical interface
glass fibre
plastic fibre
Transmission speed
9600 bit/s
19200 bit/s
Link Layer
DFC-bit used
Table continues on next page
Station communication
Supported
Yes
32
Yes
Yes
Yes
Yes
Section 19
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