Solar Applications Relays – HascoadminSeptember 12, 2023
Solar Applications Relays – HascoHigher Breakdown Voltages between Coil & ContactsBigger Contact Gap
Electromagnetic relays are applied in Solar Systems for two main purposes, i.e. at the DC side, they switch on and off the DC voltage generated by photovoltaic cells, and at the AC side, they connect to / disconnect the entire system from the power network.
AC side major requirements: “Contact clearance of minimum 1.5mm & the resistance of the contact clearance to surge voltage of 2500V (VDE standard 0126-1-1)”
DC side: “Enlarged contact clearance, withstand high inrush currents”
Low to Medium Power Inverters
PR Relay
20A@277VAC
DPST18A@277VAC@85C
Dielectric Strength 5000VAC between coil & contacts
3KV between poles
Contact Gap1.5mm & 2mm
SPR Relay
20A@277VAC
DPDT 8A@250VAC
High Inrush current 370A@1.5ms
Dielectric strength 5KV between coil & contacts
HAP03 Relay
20A@250VAC
Dielectric strength 4.5KV between coil & contacts
10KV surge voltage between coil & contacts
Medium to High Power Inverters
HAT901 Relay
30A & 40A heavy duty ratings
4KV Dielectric strength between coil & contacts
Wide contact gaps available
TV8 ratings, E ballast ratings
High Surge current ratings
HAT905 Relay
50A@277VAC
4KV Dielectric strength between coil & contacts
Wide contact gaps available
HAG02 Relay
32A & 64A Current ratings
Aux. contacts available
4KV dielectric strength between coil & contacts
2.5KV between contacts
HAG01 Relay
140A carry currents
3mm contact gap
5KV breakdown between coil & contacts
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