Lovato ATL500 Automatic Transfer Switch Controller

Changeover logic for mains and generator panels

The ATL500 is an automatic transfer switch controller from Lovato Electric for 2 power sources. The catalogue entry reads: Automatic transfer switch controller for 2 power sources, self-powered, three phase control, with NFC and synoptic. It monitors the voltage and frequency of the supplies, decides when to change over and drives the switching devices through relay outputs.

Input rating 415VAC L-L (240VAC L-N), supply 110-240 VAC, true RMS measurement. The front shows no.

Technical specifications

Selecting the version

The ATL family splits as follows: ATL100 for single-phase two-source panels, ATL500 and ATL600 for three-phase two-source panels, ATL800 for two sources plus a tie-breaker and ATL900 for three sources with two tie-breakers. Pick the one that matches the single-line diagram.

Check the voltage range and the number of relay outputs against the contactor or breaker coils and the generator start signal.

Applications and installation

Typical use is a mains and generator changeover panel for pumping stations, telecom sites, data rooms and building services. The controller is panel-mounted or DIN-rail mounted depending on version.

Dimensions are listed in the table. Relay outputs and inputs are programmable; use the Xpress software or the optical interface to configure.

For panel design and commissioning, the practical figures to keep at hand are: measuring accurancy ±0.25% f.s.; wiring mode Single-phase, two-phase, three-phase with neutral system; climatic sequence Z/ABDM (IEC/EN 60068-2-61); shock resistance 15g (IEC/EN 60068-2-27); vibration resistance 0.7g (IEC/EN 60068-2-6); execution Flush mount; material Polycarbonate; mounting Flush mount – panel cut-out 138×138 mm; degree of protection IP40 on front, IP65 with optional gasket code EXP8001, IP20 on terminals; dimensions (W x H x D) 144 x 144 x 52.2mm; weight 580 g; operating temperature (min) -30 °C; operating temperature (max) +70 °C; number of relay output 3. These come straight from the datasheet and are repeated here so that the key installation limits are visible without opening the PDF.

Related Lovato Electric products: Lovato ATL600 Automatic Transfer Switch Controller 2 Sources, Lovato DCRL8 8-Step Automatic Power Factor Controller, Lovato LVM20A240 LVM20 Level Control Relay, Lovato LVM40A240 LVM40 Level Control Relay, Lovato PMIB1A230 Insulation Monitoring Relay for IT Networks and Lovato LVMP30A240 LVMP30 Pump Start-Up Priority Change Relay.

Documents and quotation

Attached is the English datasheet that Lovato Electric’s online catalogue generates for ATL500; the specification table above reproduces its values. Make sure of the number of sources, the supply voltages, the contactor or breaker type and the generator start arrangement before placing an order, since the published values can change. More products of this type are under controllers & data acquisition. Use the quotation form with the code ATL500 and your quantity; availability is confirmed by Seven Star LLC, an independent supplier in Muscat.