Eltek Valere Theia He-t User Manual

User Manual THEIA HE-t String Inverters 357115.013 , Issue 1.0, 2011 April 47
Voltage Monitoring
First, the overvoltage monitoring is checked. The voltage trip level is ramped down from the
maximum allowed voltage level, 276 V
AC
, and decreased until it equals the current grid
voltage. The time it takes from equalization of the voltage to when the inverter disconnects
from the grid is measured.
If the sequence is successfully carried out, PASS appears. If FAIL appears, start the test again
later.
V
AC max
V
AC off
t
max
t
off
PASS
FAIL
Maximum allowed voltage; trip
level
Disconnection voltage level;
equalization
Maximum allowed disconnection
time
Time from equalization to
disconnection
The first sequence is successfully
carried out
The first sequence has failed – try
again later
Second, the undervoltage monitoring is checked. The trip level is ramped up from the
minimum allowed voltage level, 184 V
AC
, and increased until it equals the current grid
voltage. The time it takes from equalization to disconnection is measured.
V
AC min
V
AC off
t
min
t
off
PASS
FAIL
Minimum allowed voltage; trip
level
Grid voltage level
Minimum allowed disconnection
time
Time from equalization to
disconnection
The second sequence is
successfully carried out
The second sequence has failed –
try again later
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Eltek Valere Theia He-t Specifications

General

Brand	Eltek Valere
Model	Theia He-t
Category	Inverter
Language	English