Higher Breakdown Voltages between Coil & Contacts
Bigger 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
- 20A@277VAC
- DPST18A@277VAC@85C
- Dielectric Strength 5000VAC between coil & contacts
- 3KV between poles
- Contact Gap1.5mm & 2mm
- 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
- 30A & 40A heavy duty ratings
- 4KV Dielectric strength between coil & contacts
- Wide contact gaps available
- TV8 ratings, E ballast ratings
- High Surge current ratings
- 50A@277VAC
- 4KV Dielectric strength between coil & contacts
- Wide contact gaps available
HAG02 Relay
- 30A & 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