Delta M60U, Operation And Installation Manual

Page: 74 / 130

4.3.7.5 Potential Induced Degradation
4.3.7.6 Residual Current Monitoring Unit (RCMU)
RCMU (Residual Current Monitoring Unit) monitors DC and AC residual current
and inverter is disconnected from grid when residual current is high enough.
The default setting of RCMU is “ON”.
Figure 4-14: PID function Display screens
Figure 4-15: RCMU screen
DC Injection
Dry Cont.
PID Function
RCMU
►
ON
Time:
►
1 Hours
EXIT
ENT
DC Injection
Dry Cont.
PID Function
RCMU
►
ON
PID (Potential Induced Degradation) is a phenomenon which puts a high level
negative voltage on PV module and make PV module performance low.
The default action time of PID is set with 0(it means disable PID function), user
can set the time from 0-10 Hours or Auto. It will be started the function at 30
minutes after No DC, and will be stop the function when DC voltage is input.
74
Commissioning