Potential Induced Degradation; Residual Current Monitoring Unit (Rcmu); Emergency Power-Off Enable - Delta M42U Operation And Installation Manual

Commissioning

4.3.7.6 Potential Induced Degradation

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.
DC Injection
Dry Cont.
►
PID Function
RCMU

4.3.7.7 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".

4.3.7.8 Emergency Power-Off Enable

The inverter has an Emergency Power-Off function (EPO), which once enabled,
can be used to turn off the inverter via an external control signal.
See Section 3.5.3 for additional details.
ON
Figure 4-15: PID function Display screens
DC Injection
Dry Cont.
PID Function
RCMU
►
Figure 4-16: RCMU screen
ENT
Time:
►
EXIT
ON
62
1 Hours