Table of Contents
Advertisement
Installation and Operation Guide SOLECTRIA® PVI 25TL-208, PVI 50TL-480 and PVI 60TL-480
WIRE BOX
Fuses
PV1+
PV1+
PV1-
PV1-
PV2+
PV2+
PV2-
PV2-
PV3+
PV3+
PV3-
PV3-
PV Input
Figure 2-5 PVI 25TL-208 Inverter Schematic, Module-Level Rapid Shutdown Wire Box
Anti-islanding Detection
The SOLECTRIA PVI 25TL-208, PVI 50TL-480, and PVI 60TL-480 3-Phase String Inverters include unintentional
islanding detection as required by UL 1741/IEEE 1547. The inverter will continuously make bi-directional
perturbations to the frequency of the output current by injecting a small amount of reactive power to detect a
possible islanding condition. If the grid is stable, these small perturbations will have negligible effects on the
system voltage frequency. However, in an islanded condition the changes in reactive power will force the
frequency of the system voltage to deviate significantly, which will trigger the inverter to cease operation and
disconnect from the grid.
DC Ground Fault Protection
The inverters include residual current detection GFCI as part of the DC ground fault detection method required by
UL 1741. If there is a ground fault in the PV array, the ground fault detection circuitry will detect leakage current,
trigger an alarm, and the inverter will cease operation. See section 6.1.2.8 for further information regarding GFCI
Static and Dynamic trip thresholds and operation.
Surge Suppression
Table 2-1 Standard Waveform Peak Values
"Standard 1.2/50 μs - 8/20 us Combination Wave"
"Standard 0.5 μs - 100 kHz Ring Wave"
DOCR-071030-A (10/7/2022)
Vin
AC/DC Power
Transmitter
GND
Supply
DC Switch
DC SPD
PV1+
PV2+
PV-
PE
PV3+
STANDARD WAVEFORM PEAK VALUES
SURGE CATEGORY
B
INVERTER POWER HEAD
MPPT1
MPPT2
MPPT3
AFD
Ring Wave
6kV/0.5kA
Type Ⅲ MOV
Three
level
inverter
Combination Wave
6kV/3kA
AC
AC
Switch
Output
L1
L2
L3
N
Page 17 of 131
Hide quick links:
Advertisement
Table of Contents
