Wels, February 13th 2014
RIDE-THROUGH CAPABILITIES
FRONIUS SYMO 10.0-3 – 24.0-3
Fronius International GmbH
hereby confirms, that the inverters
/ Fronius Symo 10.0-3 208/240, 10.0-3 480, 12.0-3 208/240, 12.5-3 480, 15.0-3 480, 17.5-3 480, 20.0-3 480,
22.7-3 480, 24.0-3 480
Are capable of meeting the following ride-through and trip settings:
Operating
Region
OFR2 f > 64 Cease to Energize 0.1667
OFR1 63 < f < = 64 Ride Through 20 21
NORH 63 >= f > 60 Normal Operation Indefinite Indefinite
NORL
UFR1 56 <= f < 57 Ride Through 20 21
UFR2 f < 56 Cease to Energize 0.01667
Range ( Hz) Operating Mode
57 <= f < = 60
Normal Operation Indefinite Indefinite
Ride Through Trip
Duration (s)
Operating
Region
OVR2 V > 120 Cease to Energize 0.1667
OVR1 120 >= V > 110 Ride Through .92 1
NORH 110 >= V > 100 Normal Operation Indefinite Indefinite
NORL 100 >= V >= 88 Normal Operation Indefinite Indefinite
UVR1 88 > V >= 70 Ride Through 20 21
UVR2 70 > V >= 50 Ride Through
UVR3 V < 50 Permissive Operation 0.5
Range ( %) Operating Mode
Ride Through Trip
Duration (s)
20 21
Additionally, the inverters can meet Return to Service requirements of 60.1 ≥ f ≥ 59.9, 110 ≥ V ≥ 88 and 300 –
600s. The inverters can meet frequency ride-through requirements in the range of 55 – 65 Hz.
At a voltage drop down to 50% of the nominal voltage the inverter is capable of staying connected for at least
21 sec.
At a frequency drop down to 55 Hz the inverter is capable of staying connected for at least 20 sec. At a
frequency rise of 65 Hz the inverter is capable of staying connected for at least 20 sec.
The trip limits of the inverter have to be set in a way not contradicting this behavior.
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To demonstrate this behavior test results are shown in this certificate.
Test Data
Fronius has collected test data on representative samples of the Symo 12.0-3 208/240 and 24.0-3 480 to verify
ride-through behavior based on voltage and frequency variation tests described as follows. Other Symo power
classes were not tested as the hardware is the same as
one of the two models tested (only peak power output
differs).
Each test uses an AC grid simulator to achieve a step or
ramp function depicted at right.
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Voltage Ride-Through Test
Model: Fronius Symo 24.0-3 480 (Setup 480N)
Test Conditions: 480VAC (phase to phase), 60Hz, 24000W output
Step:
Start: 480V (Phase to Phase) tr: 0s
Pulse: 240V (Phase to Phase) td: 21s
End: 480V (Phase to Phase) tf: 0s
Oscillograms:
TEST 1
Chanel 1: Current on Phase 1
Chanel 2: Voltage Phase 1 to Phase 2
Chanel 3: Voltage Phase 2 to Phase 3
Chanel 4: Voltage Phase 3 to Phase 1
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TEST 2
Chanel 1: Current on Phase 1
Chanel 2: Voltage Phase 1 to Phase 2
Chanel 3: Voltage Phase 2 to Phase 3
Chanel 4: Voltage Phase 3 to Phase 1
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TEST 3
Chanel 1: Current on Phase 1
Chanel 2: Voltage Phase 1 to Phase 2
Chanel 3: Voltage Phase 2 to Phase 3
Chanel 4: Voltage Phase 3 to Phase 1
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TEST 4
Chanel 1: Current on Phase 1
Chanel 2: Voltage Phase 1 to Phase 2
Chanel 3: Voltage Phase 2 to Phase 3
Chanel 4: Voltage Phase 3 to Phase 1
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TEST 5
Chanel 1: Current on Phase 1
Chanel 2: Voltage Phase 1 to Phase 2
Chanel 3: Voltage Phase 2 to Phase 3
Chanel 4: Voltage Phase 3 to Phase 1
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