Power relays to be used in solar energy systems FUJITSU COMPONENTS - Solar relays
Among others Fujitsu designs products for integration in environmental improving appliances. Fujitsu Components’ product range contains power relays that are recommended to be used in solar energy systems.
DC SOLAR RELAYS
Fujitsu is pleased to present the FTR-J2 and FTR-K2W relay as a solution to enable remote switching and emergency cut-off of the solar panel.
FTR-J2 - Ultra small high voltage DC relay
The FTR-J2 relay is capable of switching 450 VDC, 10 A. Even though the relay’s capability is to switch these high voltages, the relay dimensions are relatively small. The relay measures just 24 (L) x 23.5 (W) x 27 (H) mm. To be able to switch high DC voltages despite small dimensions, Fujitsu has designed two strong magnets within the relay to extinguish the severe breaking arc.
The FTR-J2 is a 2 Form A relay that can be used in two different configurations:
Circuits with a configuration of switching 2x200 VDC
Circuits with a configuration of switching 1x450 VDC
The FTR-J2 is a powerful, compact and reliable solution for solar appliances that need to switch high DC voltage. For more information see data sheet…
FTR-K2W - DC relay with 2 x 3.2 mm contact gap
The brand-new FTR-K2W DC relay is also suitable to be integrated in the converter of solar systems to switch on/off the DC voltage generated by the solar panel. The main feature of this relay is its big contact gap of >6mm. The high insulation that the FTR-K2W offers, is shown in the relay´s insulation distance of clearance > 8.0mm / creepage >9.5mm, the 5,000 VAC dielectric strength and the surge strength of 10,000 VAC. Furthermore the relay is capable of switching 60V DC, 30A.
Fujitsu’s FTR-K2G and new developed FTR-K3-WG and FTR-F4G relays can function as interface between the solar converter and the power grid. These AC relays can be used in compliance with DIN VDE 0126-1-1. According to this safety standard the circuit break function between the solar converter and the power grid must have a contact gap = 1.5mm at each pole.
The FTR-F4G with relatively lower power switching capabilities is recommended for the small solar panel systems, where the FTR-K2G and the FTR-K3-WG are most useful for relatively large solar panel systems. The FTR-K3-WG Relay can handle a carry current of 25A.
