SECTION 3
INSTALLATION AND INITIAL TURN-ON
Array Grounding
NEC 690-41/42 requires the PV array to be earth grounded. The PV-30208 is shipped with a ground bond for installation between the pv negative terminal block to the pv safety ground terminal block. The PV-30208 chassis is also bonded to the PV safety ground terminal block. This ground bond is clearly marked with a warning label which must be read before installation. For floating PV array configurations, the factory installed PV negative ground bond must not be installed. Installation of this ground bond will cause irreparable damage to the PV-30208. For bipolar PV array configura- tions, the installer must move the ground bond between the PV array midpoint and the safety ground terminal block. Refer to the system schematic in Section 7, Appendix for further wiring configura- tion.
Ground Fault Detection
The PV-30208 is equipped with a ground fault detection circuit and current transducer (CT1 in illustration). This circuit is active when the PV array is grounded as de- scribed in the previous section. In the event of a greater than 10 amp ground fault, the PV-30208 will execute an orderly shutdown and annunciates a ground fault at the operator interface. The PV-30208 will remain faulted until the ground fault is remedied and cleared at the operator interface (see section 5, Troubleshooting).
CAUTION
The input and output circuits are isolated from the enclosure and the system grounding, if required by sec- tions 690-41, 690-42 and 690-43 of the National Elec- trical Code, ANSI/NFPA 70, is the responsibility of the installer.
Phase-Sequencing
The PV-30208 is equipped with an automatic sequence-phase-detection control algorithm. This allows the utility interface conductors to be connected in any sequence convenient at the time of installation. Upon system initialization at power-up, the PV-30208 determines the phase sequence of the utility connection and configures the modulator drivers accordingly.
INTERCONNECTION WIRING
CAUTION
To reduce the risk of fire, connect only to a circuit provided with 125 amperes @208VAC, or 50 amperes @480VAC maximum branch circuit overcurrent protec- tion in accordance with the National Electrical Code, ANSI/NFPA 70.
DOCUMENT: 151315PV-30208 Photovoltaic Inverter3-4
Operation and Maintenance Manual
Copyright 2003, Xantrex Technology Inc.
