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
7.9.5 Function block
STTIPHIZ
USU*
USI*
BLOCK
ZREFSEL
TRIP
START
ALARM
OPCIRC
ERROR
ERRSTAT
RAVE
XAVE
FREQU
RFAULT
ZREF
ZREFRE
ZREFIM
URMSSTAT
IEC10000298-2-en.vsd
IEC10000298 V1 EN
Figure 132: STTIPHIZ function block
7.9.6 Signals
Table 136: STTIPHIZ 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 137: STTIPHIZ Output signals
Name
Type Description
TRIP BOOLEAN Trip
START BOOLEAN Start
ALARM BOOLEAN Alarm
OPCIRC BOOLEAN Injection circuit open
ERROR BOOLEAN Error
ERRSTAT INTEGER Error indication
Table continues on next page
Section 7 1MRK502052-UEN B
Impedance protection
296
Technical manual