Lovato ADXL0075600 Soft Starter 75 A with Bypass

Lovato ADXL0075600 soft starter, 75 A with built-in bypass

The Lovato ADXL0075600 is a soft starter with a rated current of 75 A for three-phase asynchronous motors on 208 to 600 V AC supplies. It controls two phases, includes an internal bypass contactor, and offers torque-ramp, voltage-ramp and constant-torque starting with current limit. For a 400 V motor it corresponds to 37 kW, and at 500 V to 45 kW. Seven Star LLC supplies the ADXL0075600 in Oman and the GCC as an independent supplier in Muscat.

The code reads ADXL (family), 0075 (rated current in amperes) and 600 (maximum line voltage class). The catalogue also lists a code with 024 appended, ADXL007560024, so confirm the auxiliary supply voltage when ordering; the part here takes 100 to 240 V AC.

ADXL0075600 technical specifications

How the ADXL0075600 starts a motor

Instead of applying full voltage, the starter uses phase-controlled thyristors in two phases to ramp torque or voltage, while limiting current to a set value. This lowers mechanical shock on couplings and the pressure surge in pipelines, and reduces the starting current drawn from the generator or weak feeder. When the motor reaches speed the internal bypass closes and takes over the current, so the thyristors stop dissipating heat and the unit can be mounted in a compact enclosure.

The torque-control start suits centrifugal pumps, where the stop ramp prevents water hammer. The display and a kick-start function help with loads that need a short burst to break away, and dynamic braking is available for loads that need to stop faster than free-wheel.

Protections of the ADXL0075600

The starter protects the motor with an electronic overload that has trip classes 2, 10A, 10, 15, 20, 25, 30, 35 and 40 at start and 2 to 30 in run, plus locked rotor, current asymmetry, and minimum torque (dry-run) detection. It also monitors the supply for phase loss, phase sequence, frequency and voltage, and itself for overcurrent, overtemperature, bypass failure and shorted phase. A PTC input reads the motor thermistors, and an event log, hour counter and clock support maintenance.

Where the ADXL0075600 fits in the family

The starter sits in the ADXL range between the ADXL0045600 (45 A class) and the ADXL0135600 (135 A with forced cooling), and it relies on natural cooling, with forced cooling an option. It can be fixed by screws or on 35 mm DIN rail using the optional EXP8003 accessory. The 75 A size is a typical choice for 37 kW pumps.

ADXL0075600 selection and ordering checklist

• Motor nameplate current and voltage, compared with 75 A starter rating
• Start duty: starts per hour, load type and expected ramp time
• Control supply: 100 to 240 V AC for this code
• Altitude and ambient temperature, with derating from 40 °C
• Need for extra I/O, fieldbus or external keypad via expansion modules
• Back-up fuses or breaker per local code

Installation and commissioning of the ADXL0075600

The IP00 body means all live parts are open, so the starter must be installed inside a suitable enclosure with clearances for airflow. Use screw fixing or the DIN rail accessory. Program the motor current and ramp through the display, the optical port or NFC from a smartphone, then run the motor unloaded where possible. Check that the line contactor output from the starter is wired when a main contactor is used.

Typical ADXL0075600 applications in Oman and the GCC

37 kW motors drive process water pumps, sea-water lift pumps, fans, screw compressors and conveyors. Soft starting is valuable where long cable runs and weak grids make direct-on-line starts disturb other loads, and in hot enclosures the 0.5%/°C derating above 40 °C needs to be built into the design.

Weight and size are modest for a 37 kW starter: 2.9 kg and 95 x 226 x 182 mm. That makes it easy to retrofit into an existing motor control centre bucket where a star-delta starter once sat, provided the wiring is changed from six motor leads to three. Always size the upstream protection to the starter manual, and keep the auxiliary supply separate from the motor circuit so that the display and fault memory survive a voltage dip on the main feeder.

Information to send with an RFQ for the ADXL0075600

• Part number ADXL0075600 and quantity
• Motor kW, voltage and full-load current
• Load type and duty cycle
• Control voltage and I/O needs
• Panel ambient temperature and altitude
• Approval requirements

Site conditions in Oman for the ADXL0075600

Low-voltage switching and protection devices in Oman often sit in motor control centres and outdoor panels where internal temperatures are high for much of the year. When you select the ADXL0075600, check its rated values at your real ambient temperature, as stated in the manufacturer documentation, and confirm the coordination with upstream protection and with the motor or load it serves. Short-circuit levels differ from site to site, so verify the breaking capacity required at the point of installation.

Standardising ratings and coil voltages across a project reduces the number of spare part numbers that need to be stocked. Keeping a small stock of the ADXL0075600 and recording settings such as trip ranges or ramp times shortens repair work during a breakdown.

Documents and quotation

Send the part number ADXL0075600 and we will confirm the documents available for it, such as the technical data sheet, wiring diagram and instruction sheet, together with availability and lead time.

Seven Star LLC is an independent supplier in Muscat and is not an official channel of the manufacturer. Share the quantity, delivery location and project reference with the request and we will answer with a formal quotation.