POWER ELECTRONICS’ RECOMBINER AND CENTRAL INVERTER COMPLIANT WITH NEC2014’s FUSE SERVICING AND GROUND FAULT PROTECTION REQUIREMENTS

Power Electronics announces the introduction of FSDK recombiners and PV Array transfer kit that make HEC-US central inverters and HEK Skid PV Stations to achieve compliance with NEC2014’s fuse servicing requirements and ground fault protection requirements.

FSDK recombiners will be featured with up to 40 inputs, isolating contactors, zone monitoring, and fuse sizes from 70A to 400A. The contactors of the DC cabinet and the built-in ones in each conversion module can be easily lockout and tagout individually or in groups multiplying the field operations and allowing compliance with NEC2014’S 690.15(C) section. Forget about losing the production of one third of your PV power due to a ground fault defect, by just isolating the contactor of the faulty string you will be able run routine maintenance inspections without compromising the up-time rate of the plant.

Power Electronics’ HEC-US now is available with PV ARRAY TRANSFER KIT, a cost-competitive solution that enables a safe operation and maintenance of the negative grounded PV plants, and a fully compliance of NEC2014 690.5(A)(1) and 690.35(C)(1) for checking PV isolation before startup. By mounting this kit the inverter and the PV plant will be able to shift its running conditions from negative grounded array to floating array and vice versa. Under regular conditions the inverter will be running with a negative pole grounded and therefore, a GDFI will be protecting from the unlikely ground fault defects and at the same time the solar cells will not suffer at any time a negative voltage relative to their surroundings. This running mode can be sifted manually or automatically without stopping the inverter to a floating array configuration enabling an isolation monitoring device that O&M can use for: regular PV plant isolation control, identification of the array affected by a ground fault defect, and what is more important increase the operator safety under O&M service activities.