UL-certified solid-state relay and contactor

Paul Boughton

Carlo Gavazzi is introducing what is claimed to be the first UL-certified solid-state relay and contactor combination in a compact 17.5mm wide housing. The new RG series includes RGS panel-mounted models rated up to 600V AC and 90A AC plus RGC versions with integrated heat sink attaining 20A AC in 17.5mm or 30A AC in 22.5mm widths.
With a reduced space requirement per unit, nominal ratings at 40 degrees C, and 100kA short circuit capability, this new range provides silent switching of heaters and motors, with potential applications in the plastic and rubber industries, HVAC, food and beverage, car services, electronics, printing and glass.
All relays and contactors in the series are VDE-approved and designed in accordance with the latest EN/IEC 62314 standards for solid-state relays. Also, unlike most such devices on the market, RG products are UL listed to facilitate machine approvals and inspections. They are robust and reliable, resisting up to 5 'g' of vibration and featuring integrated overvoltage protection across the output. Dependable operation is confirmed by control status LED indication on the front of the device.
The new RG relays can be controlled with a DC voltage range of 4-32V DC, while AC controlled types have a voltage range 20-275V AC as well as 24-190V DC, thereby covering standard control regimes such as 24V AC/DC or 110V DC. There is a choice of either Zero Cross or instant ON (random) main voltage switching versions.
RGS relays can be mounted on any heat sinking surface and are designed so that the distance between the heat-sink mounting holes is identical to that on standard 'hockey puck' solid-state relays. They incorporate special stress-relief mechanisms to cater for excess forces during the mounting process.
Throughout the series, installation is simplified by having output terminals that are designed for easier looping of power cables up to 6mm2, with a removable IP20 cover that allows power terminals to accept ferrule, ring and fork-type terminations. On the control side, terminals allow for double cables having a cross-sectional area of up to 2.5mm2. Good-grip screw terminals are a further innovation to make cabling procedures faster.
As well as -40 to +80 degrees C operation, the RG series can operate in relative humidity up to 95 per cent non-condensing, which makes them suitable for safe operation of equipment such as small coffee machines and ovens.
For more information, visit www.carlogavazzi.co.uk