Monitoring the resistor's rise temperature through thermal model means that the re-
sistor can tested before switched again determine whether its limit
temperature has been exceeded. The
connection will also established the event manual triggering even earth fault
did not occur.
. The thermal overheating the resistor reported.
If the resistor's connection triggered manually through binary input the serial SCADA
connection, the connection will established after the switch-on delay has lapsed. the resistor risks overheating, the REG-DP/ REG-DPA will
prevent from switching on. full impulse sequence can only run once the resistor has
cooled down sufficiently.Page 118 Detailed description REG-DP/ REG-DPA parameters
We take care it.
Zero sequence voltage Uo
Earth fault signalisation
Resistor’s connection
Switch-on delay
Switch-on
time
Transient
earth
fault time
t
Repeat time
Repeat delay
X number cycle repeats
Figure 84: Time lapse the resistor control; Standard without transient suppression
Zero sequence voltage Uo
Earth fault signalisation
Resistor’s connection
Switch-on
delay
Switch-on time
Transient
earth
fault time
t
Repeat time
Repeat delay
X number cycle repeats
Figure 85: Time lapse the resistor control; Standard with transient suppression
The resistor's connection can also triggered through binary input serial connection
to the SCADA system
