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Electrical Specifications
975-0253-01-01 A–3
Adjustable Disconnect Settings
Islanding protection is an essential safety feature that ensures no person working
on the grid is harmed by a distributed energy source. Default software settings are
programmed into each GT Inverter at the factory to ensure it does not island
according to relevant safety regulations (VDE 0126, RD 1663/2000).
In some instances it may be desirable from both a utility and customer point of
view to adjust these default settings. For example, the GT Inverter may experience
“nuisance trips” (taking the inverter “offline”) if the grid is weak and the voltage
falls outside the allowable range specified in the regulations. It may be difficult
for a utility to upgrade the grid to eliminate this problem. With permission from
the utility, the factory settings may be changed to allow the GT inverter to operate
over a wider grid voltage range.
These settings are password protected and should only be changed by qualified
service personnel, using a special software application provided by Xantrex.
Changing any values may compromise compliance with safety regulations. Do
not do so without first consulting with the utility and agreeing on acceptable
settings.
The default values of these settings differ from the utility specifications on page
A–2. These differences take into account the accuracy ranges listed in the table
below, and are intended to ensure that utility specifications are always met.
Note: Disconnect settings on German models are not adjustable.
Setting
Default Values
Adjustment
Range Accuracy
230 Vac/
50 Hz (SP)
AC Low Voltage 198 Vac
180–269 Vac +/– 3 Vac
AC High Voltage 250 Vac
AC Low Frequency 49.1 Hz
46.0–62.0 Hz +/– 0.1 Hz
AC High Frequency 50.9 Hz
Reconnect Delay 180 sec. 0–600 sec. +/– 5 sec.