Lovato ADXL0135600 135 A Soft Starter

Soft-start and soft-stop up to 135 A without a separate bypass contactor

The ADXL0135600 belongs to the Lovato Electric ADXL series, a compact soft starter with an integrated bypass relay and a wide-range auxiliary supply of 100-240VAC. It is rated 135 A on a three-phase supply of 208-600VAC and controls 2 phases of the motor, which keeps the power section small and light at 7.8 Kg.

Technical specifications

Sizing the starter for your motor

Sizing rule of thumb for this code: nameplate current at or below 135 A, supply inside 208-600VAC, and an ambient that stays under the derating threshold of 40 degC. The kilowatt value (75 kW at 400 V in line) is only a guide.

Order-code reading, derived from the catalogue entry: the characters after ADXL give the current size (135 A for this code), with the standard auxiliary-supply version covering 100-240VAC.

Applications and installation notes

Typical jobs are centrifugal pumps, fans, compressors and conveyors where a ramped start protects couplings, belts and pipework. On a water or wastewater line the stop ramp softens the pressure surge when the motor is switched off, and the adjustable current limit helps on weak or generator-fed supplies.

Mounting is screw-fixing; the body measures 212 x 301 x 216 mm, weighs 7.8 Kg and has protection IP00. Allow free space above and below for airflow, use the programmable relay for the line contactor command, and fit short-circuit protection upstream as the instruction manual specifies.

Key features of the ADXL0135600

• Integrated bypass relay: once the motor reaches speed the thyristors are bypassed, which cuts heat dissipation in the panel and removes the need for an external bypass contactor.
• Two-phase control, keeping the power section compact at 212 x 301 x 216 mm.
• Three start methods, torque ramp, voltage ramp and constant torque, each combined with current limit, so the start profile can be matched to pumps, fans or conveyors.
• Selectable trip classes for both starting and running overload, plus a PTC input for direct motor winding protection.
• Parameter setting through the backlit display, the optical port or NFC from a smartphone, even with the unit unpowered.
• Event log, motor hour counter and start counter that help plan maintenance.

Commissioning and maintenance

Set the motor rated current first, then choose the trip class to suit the load: a light centrifugal pump usually starts within a short time, while a loaded conveyor or a high-inertia fan needs a higher class to avoid nuisance trips. Begin with a moderate current limit and raise it only if the motor fails to reach speed in the expected time. For pumps, the torque-ramp stop is the setting that reduces water hammer. During routine maintenance, check the cooling fan alarm history in the event log, clean dust from the heatsink and confirm that power terminals remain tight, since loose connections are a common source of heating at currents above 100 A.

Considerations for Oman and GCC sites

The starter runs up to +60 °C, but above 40 °C the rated current falls by 0.5 % per degree. In a summer panel at 50 °C that means about 5 % less current, so a motor with a nameplate current close to 135 A may need the next size up. Because the unit is IP00, it must sit inside an enclosure that keeps out dust and moisture, an important point in desert pumping stations and coastal desalination plants alike.

Documents and quotation

Download the attached datasheet for ADXL0135600 from the Lovato Electric online catalogue (English) to see every parameter in full. What to confirm before ordering: the motor nameplate current and starting duty, the main supply voltage, the auxiliary control voltage and the ambient temperature at the panel. The manufacturer can revise published data at any time. Other options are in motor soft starters. An RFQ for ADXL0135600 needs only the quantity and delivery location; Seven Star LLC, an independent Muscat supplier, replies with availability.