ABB REG670 - Function Block; Signals

The injection equipment provides calculation of the fault resistance:
• If the fault resistance is equal or below 10 kΩ, RFAULT is displayed in Ω
• If the fault resistance is above 10 kΩ, RFAULT is initially displayed as -1000
until the fault resistance has reached a stable value and then displayed in Ω
• RFAULT displayed as -2000 means error
7.8.5 Function block
ROTIPHIZ
USU*
USI*
BLOCK
ZREFSEL
TRIP
TRIPDC
TRIPAC
START
STARTDC
STARTAC
ALARM
ERROR
ERRSTAT
RAVE
XAVE
FREQU
RFAULT
ZREF
ZREFRE
ZREFIM
URMSSTAT
IEC10000297-2-en.vsd
IEC10000297 V1 EN
Figure 124: ROTIPHIZ function block
7.8.6 Signals
Table 125: ROTIPHIZ Input signals
Name
Type Default Description
USU GROUP
SIGNAL
- Injected voltage signal
USI GROUP
SIGNAL
- Injected current signal (voltage over shunt)
BLOCK BOOLEAN 0 Block of function
ZREFSEL INTEGER 1 Reference impedance selection
Table 126: ROTIPHIZ Output signals
Name
Type Description
TRIP BOOLEAN Trip (common AC and DC side of exciter)
TRIPDC BOOLEAN Trip for DC side of exciter
TRIPAC BOOLEAN Trip for AC side of exciter
Table continues on next page
Section 7 1MRK502052-UEN B
Impedance protection
282
Technical manual