Medium Voltage Soft Starters for Industrial Applications

Medium Voltage Soft Starters for Industrial Applications

Engineered to deliver smooth, controlled motor acceleration while protecting your equipment from electrical and mechanical stress across 3kV-11kV systems.

Tech Consultation

AMV Series Medium Voltage Solid-State Soft Starter

The AMV Series Medium Voltage Solid-State Soft Starter is an advanced motor starting solution designed for AC 3kV-11kV applications. Utilizing thyristor-based voltage control, it ensures seamless motor acceleration while minimizing electrical/mechanical stress on grids, motors, and connected equipment. Key features as below:

Voltage Range: AC 3kV/6kV/10kV (±10%-15%)

Cooling: Natural convection (no fans required)

Certifications: IEC, UL, and industry-specific standards

Motor Compatibility: Three-phase motors,

squirrel-cage asynchronous / synchronous

Ambient Temperature: -40°C to +50°C

Control Modes: 2-Wire, 3-Wire, Remote (Modbus)

Altitude: <2000m (customizable for higher elevations)

Cable Length: <600m (longer runs require design review)

Real-Time Monitoring

Voltage: Grid line voltage

Current: 3-phase motor current (A/B/C)

Phase Sequence: Corrective detection for grid voltage

Frequency: 50Hz/60Hz (±2Hz)

Flexible Communication

Display: Touchscreen HMI with RS232

External: RS485, RJ45 (Modbus-RTU/TCP), or Wireless (WiFi/5G)

Protection Functions

Over/Under Voltage

Voltage exceeds ±15% of set range

Overcurrent

Current > preset threshold during start/run

Startup Timeout

Motor fails to reach rated speed within set time

Overload/Underload

Abnormal load detected during operation

Input/Output Phase Loss

Missing phase in power supply or motor circuit

Phase Imbalance

>5% imbalance (prevents motor shaking/overheating)

Why Choose Our Medium Voltage Soft Starter?
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Reduced
Mechanical Stress

Our thyristor-controlled soft start technology ensures smooth, linear acceleration by gradually ramping up voltage (0-100% in adjustable time), eliminating torque spikes that cause belt slippage, gear damage, and bearing wear in heavy-duty motors.
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Smart Diagnostics

Integrated monitoring provides real-time alerts for 15+ fault conditions (phase loss, imbalance, etc.) via Modbus RTU/TCP, enabling predictive maintenance through historical data logging and remote troubleshooting capabilities.
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Grid Protection

Advanced current limiting technology maintains inrush current below 3.5x rated current (vs. 6-8x for direct starts), preventing voltage dips that disrupt sensitive equipment and reducing demand charges from utility providers.
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Customizable

Engineered for challenging installations with options for high-altitude derating (up to 4000m), extended cable runs (600m+), and harsh conditions (-40°C to +50°C operation) with optional NEMA 4X enclosures for corrosive environments.

Typical Applications

Water Pumping Systems

Controls large pumps to eliminate water hammer and protect pipeline infrastructure during start/stop cycles.

Mining / Mineral Processing

Provides smooth acceleration for crushers, conveyors and grinding mills to reduce mechanical stress in harsh mining environments.

Oil / Gas Operations

Safely starts compressors and injection pumps while withstanding extreme temperatures and corrosive conditions.

Steel Manufacturing Plants

Enables controlled starting of rolling mills and blowers to prevent power grid disturbances in heavy industrial settings.

Tunnel / Underground Ventilation

Gradually ramps up large axial fans to avoid current surges while maintaining critical airflow requirements.

Power Generation Facilities

Optimizes boiler feed pumps and cooling tower fan operations for improved plant efficiency and equipment longevity.

FAQs

Can your medium-voltage starter operate at high altitudes?

Our medium-voltage solutions can be customized for high-altitude applications above 2000m - please consult our engineers.

What voltage levels does your medium-voltage soft starter support?

Our solid-state soft starter is designed for medium-voltage applications, supporting 3.3kV, 6.6kV, 10kV and 11kV motor starting.

How does the medium-voltage starter reduce mechanical stress during startup?

The thyristor-controlled medium-voltage soft starter provides smooth voltage ramp-up to ensure gentle motor acceleration.

What protection features are included for power fluctuations?

The medium-voltage starter has built-in over/under voltage protection (±15% range) to safeguard against grid instability.

Is this medium-voltage starter suitable for synchronous motors?

Yes, it works with both medium-voltage asynchronous and synchronous motors in demanding industrial environments.

How does the bypass function work in your medium-voltage starter?

When the motor reaches full speed, our medium-voltage soft starter automatically transfers to bypass mode for efficient operation.

What are the cable requirements for medium-voltage soft starters?

For standard medium-voltage installations, we recommend keeping motor cables under 600m to maintain optimal performance.

What communication protocols does your medium-voltage starter support?

The medium-voltage soft starter features Modbus RTU/TCP protocols for seamless PLC/DCS integration via RS485, Ethernet or wireless.

How does your medium-voltage starter handle phase imbalance?

Our medium-voltage protection system continuously monitors all phases and will shut down if imbalances exceed safe limits.

Why use your medium-voltage starter for pump applications?

The medium-voltage soft starter eliminates water hammer in pumps while providing phase-loss and overload protection.

Contact us for custom solutions

Provide these details when ordering:
- Motor specs (voltage, current, power, RPM)

- Load type (pump/fan/compressor)

- Environmental conditions

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