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51ADX0820 – SOFT STARTER ADX0820
Lovato 51ADX0820 severe-duty three-phase soft starter rated at 820 A with a 208–415 V AC supply, adjustable current limitation, comprehensive motor protection and provision for an external bypass contactor.
Why Choose the Lovato 51ADX0820 Soft Starter?
The Lovato 51ADX0820 is an advanced three-phase soft starter designed for controlled starting and stopping of asynchronous three-phase motors in severe-duty industrial applications. As part of the Lovato Electric ADX soft starter series, it is designed for severe-duty starting at up to 5 × Ie and is predisposed for connection to an external bypass contactor.
The 51ADX0820 provides three-phase control with torque or voltage ramp starting and adjustable current limitation. It also supports torque-ramp, voltage-ramp and free-wheel stopping, together with electronic motor overload protection, torque control, kick start, dynamic braking, PTC motor protection and comprehensive supply, motor and starter protection functions.
With a rated starter current of 820 A and a three-phase 208–415 V AC rated supply, the 51ADX0820 has IEC motor ratings of 250 kW at 230 V AC, 400 kW at 400 V AC and 600 kW at 500 V AC. Its forced cooling system and provision for an external bypass contactor make it suitable for demanding high-power industrial motor-starting applications.
Key Advantages
- Advanced three-phase soft starter designed for severe-duty applications.
- 820 A rated starter current for high-power industrial motors.
- Three-phase 208–415 V AC rated supply.
- Predisposed for an external bypass contactor.
- Torque or voltage ramp starting with adjustable current limitation.
- Comprehensive motor protection including overload, locked-rotor, current asymmetry and low-load protection.
Key Features
- Lovato Electric ADX soft starter series.
- 820 A rated starter current.
- 208–415 V AC three-phase rated supply voltage.
- 208–240 V AC auxiliary supply voltage.
- 250 kW at 230 V AC, 400 kW at 400 V AC and 600 kW at 500 V AC IEC motor ratings.
- Three controlled phases.
- Predisposed for an external bypass contactor.
- Backlit 2 × 16-character LCD display.
- Torque or voltage ramp starting with current limitation.
- Torque ramp, voltage ramp and free-wheel stopping modes.
Advanced Soft Starting for Industrial Motors
Soft starters progressively control the electrical power supplied to a motor during acceleration, helping to reduce the high starting current and mechanical stress associated with direct-on-line starting. The Lovato 51ADX0820 provides three-phase control with configurable torque or voltage ramp starting, allowing acceleration to be matched to the requirements of the motor and driven equipment.
The 51ADX0820 is predisposed for connection to an external bypass contactor rather than incorporating an internal bypass. Its protection functions include motor overload protection during starting and running, locked-rotor detection, current asymmetry monitoring, minimum-torque protection, phase-loss and phase-sequence protection, overcurrent protection and thyristor overtemperature protection.
Typical Applications
- Large industrial pumps and pumping systems.
- Fans, blowers and ventilation equipment.
- Conveyors and material handling systems.
- Compressors and process machinery.
- Heavy-duty production and processing equipment.
- High-power three-phase motor applications requiring controlled acceleration and external bypass arrangements.
Technical Specifications
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| Motor Protection | Yes | |
|---|---|---|
| Current | 820 A | |
| Power | 400 kW | |
| Phase | Three Phase | |
| HS Code | 85371098 | |
| Manufacturer | Lovato Electric | |
| Series | ADX | |
| Model | 51ADX0820 | |
| Product type | Advanced three-phase soft starter | |
| Motor type | Asynchronous three-phase | |
| Duty | Severe duty, starting current 5 × Ie | |
| Rated starter current | 820 A | |
| Rated supply voltage | 208–415 V AC | |
| Auxiliary supply voltage | 208–240 V AC | |
| Rated frequency | 50/60 Hz | |
| Rated motor power at 230 V AC | 250 kW | |
| Rated motor power at 400 V AC | 400 kW | |
| Rated motor power at 500 V AC | 600 kW | |
| UL motor rating at 220–240 V AC | 300 HP | |
| UL motor rating at 380–415 V AC | 500 HP | |
| UL motor rating at 440–480 V AC | 600 HP | |
| Number of controlled phases | 3 | |
| Built-in bypass | No | |
| External bypass | Predisposed for external bypass contactor | |
| Cooling system | Forced cooling | |
| Display | Backlit LCD, 2 × 16 characters | |
| Starting method | Torque or voltage ramp with current limitation | |
| Stopping methods | Torque ramp, voltage ramp and free-wheel stop | |
| Braking method | DC dynamic braking with external relay | |
| Digital inputs | 3 | |
| Analogue inputs | 1 | |
| Analogue input | 0–10 V DC | |
| Digital outputs | 4 | |
| Digital output arrangement | 3 × 1 NO (SPST) + 1 C/O (SPDT) | |
| Analogue outputs | 1 | |
| Analogue output | 0–20 mA or 4–20 mA | |
| Protection rating | IP00 | |
| Pollution degree | 3 | |
| Mounting type | Screw fixing | |
| Operating temperature | -10 to +55 °C | |
| Storage temperature | -30 to +70 °C | |
| Maximum altitude without derating | 1000 m | |
| Maximum relative humidity | 95% without condensation or dripping | |
| Dimensions (W × H × D) | 910 × 950 × 442 mm | |
| Weight | 164 kg | |
| EAN | 8013975068151 |
Frequently Asked Questions
What is the Lovato 51ADX0820 used for?
The Lovato 51ADX0820 is an advanced three-phase soft starter designed for controlled starting and stopping of asynchronous three-phase motors in severe-duty industrial applications.
What is the rated current of the Lovato 51ADX0820?
The 51ADX0820 has a rated starter current of 820 A.
What motor power does the 51ADX0820 support?
Under IEC ratings at up to 40 °C, the soft starter is rated for 250 kW at 230 V AC, 400 kW at 400 V AC and 600 kW at 500 V AC.
Does the 51ADX0820 have an integrated bypass contactor?
No. The Lovato 51ADX0820 is predisposed for an external bypass contactor, which must be provided separately when required by the installation.
What supply voltage does the 51ADX0820 require?
The 51ADX0820 has a three-phase rated supply voltage of 208–415 V AC and requires a 208–240 V AC auxiliary supply.
Trusted Industrial Motor Control from Lovato Electric
Lovato Electric ADX soft starters provide advanced three-phase motor starting and stopping control, combining configurable torque and current control, comprehensive motor protection and external bypass capability for demanding industrial applications.
