The Solcon RVS-DN 390 690-230-230-9-S Digital Reduced Voltage Starter is an advanced motor starting solution engineered by Solcon to provide smooth, controlled acceleration of three-phase induction motors while minimizing mechanical stress and electrical disturbance on the power distribution network. Rated at 390A full load current with 690V mains voltage capability, this digital soft starter is ideal for medium-to-large motor applications where direct-on-line starting would create unacceptable voltage dips, mechanical shock, or torque transients. Auto2mation is pleased to offer this quality Solcon soft starter to clients seeking sophisticated motor control solutions.

Reduced voltage starters, commonly known as soft starters, have become essential components in modern industrial automation systems where motor starting characteristics must be carefully managed. Unlike traditional electromechanical starting methods such as star-delta or autotransformer starters, digital soft starters like the RVS-DN series provide continuously variable voltage ramp control from zero to full voltage. This enables precise management of starting current, acceleration torque, and pump/motor mechanical loading. The Solcon RVS-DN series incorporates microprocessor-based control algorithms, comprehensive protection functions, and user-friendly programming interfaces that simplify commissioning and optimize motor starting performance.

Key Features & Specifications

The Solcon RVS-DN 390 delivers an impressive array of features that make it one of the most capable digital reduced voltage starters in its power class. Its digital control architecture provides programming flexibility that electromechanical starters cannot match.

• Starter FTC/FLC: 390A for medium-to-large motor applications
• Mains Voltage: 690V at 50/60 Hz for industrial power systems
• Control Voltage: 230V AC for standard control circuits
• Control Inputs: 230V AC compatible
• Digital Control: Microprocessor-based starting algorithms
• Smooth Acceleration: Controlled voltage ramp minimizes mechanical stress
• Reduced Inrush: Limits starting current to protect power distribution
• Part Reference: WO1040039001

Technical Specifications

Specification	Details
Product Name	Solcon RVS-DN 390 Digital Reduced Voltage Starter
Manufacturer	Solcon
Type	Digital Reduced Voltage Starter
Series	RVS-DN
Model	RVS-DN 390 690-230-230-9-S
Starter FTC/FLC	390A
Mains Voltage	690V 50/60Hz
Control Voltage	230V AC
Control Inputs	230V AC
Part Reference	WO1040039001
Weight	31.700 Kg

Applications & Use Cases

The Solcon RVS-DN 390 Digital Reduced Voltage Starter is deployed across a wide range of industrial applications where controlled motor starting is essential for equipment protection and process stability. In pumping systems, the soft starter eliminates water hammer by providing smooth acceleration rather than the sudden torque application characteristic of direct-on-line starting. This extends pump mechanical life, reduces pipeline stress, and eliminates the noise and vibration associated with hydraulic shock. Municipal water treatment plants, HVAC systems, and irrigation installations all benefit from Solcon soft starter technology.

Marine applications including ballast pump control, fire pump starting, and cooling water systems utilize the RVS-DN series to prevent voltage dips that could affect sensitive navigation and communication equipment during motor starting. The 690V rating accommodates the higher voltage distribution systems commonly found on commercial vessels and offshore platforms. Conveyor systems, crushers, and mills in mining and materials handling benefit from the torque ramp control that prevents material spillage and mechanical shock during startup.

In HVAC and refrigeration systems, the RVS-DN 390 provides gentle starting of large compressor and chiller motors, reducing mechanical wear on bearings, couplings, and drive belts. The digital control algorithms can be programmed to optimize starting characteristics for specific load profiles, delivering the right combination of starting torque and acceleration time for each application.

Why Choose the Solcon RVS-DN 390

Solcon has established a global reputation for excellence in motor control and power electronics since 1977. The RVS-DN series represents decades of refinement in digital soft starter technology, incorporating field-proven thyristor control algorithms, robust power stage design, and intuitive user interfaces. When you select the RVS-DN 390, you are investing in a product from a manufacturer with millions of soft starters operating successfully in industrial environments worldwide.

Auto2mation enhances this value with our thorough inspection and testing procedures, 30-day warranty coverage, and complimentary worldwide shipping. Our technical team can assist with application sizing, programming guidance, and integration recommendations to ensure your motor starting project achieves optimal results.

Compatibility & Integration

The Solcon RVS-DN 390 is designed for integration into standard motor control center (MCC) assemblies and standalone motor control enclosures. The 690V mains voltage rating accommodates both 400V and 690V distribution systems, while the 230V control voltage is compatible with standard industrial control transformers. The starter should be protected upstream by appropriate short-circuit protective devices (circuit breakers or fuses) rated for semiconductor protection. Auto2mation can provide guidance on coordination between the soft starter and upstream protection devices according to IEC standards for motor starter applications.

Maintenance & Support

Digital soft starters require minimal maintenance compared to electromechanical starting methods. Recommended procedures include periodic inspection of power terminal connections, verification of cooling system operation (fans and heat sinks), and checking of control wiring integrity. The RVS-DN's built-in diagnostics monitor thyristor health, motor current balance, and thermal status, providing early warning of potential issues. Auto2mation supports your maintenance program with our 30-day warranty and technical consultation services.

Frequently Asked Questions

Q1: What motor size can the RVS-DN 390 start?

The 390A rating accommodates medium-to-large three-phase induction motors, typically in the 200-315 kW range at 400V or 315-500 kW range at 690V, depending on application requirements.

Q2: What mains voltage does this starter support?

The RVS-DN 390 supports 690V mains voltage at 50/60 Hz, making it suitable for both standard 400V and high-voltage 690V industrial distribution systems.

Q3: What is the control voltage?

The starter uses 230V AC control voltage with 230V AC control inputs, compatible with standard industrial control circuits.

Q4: What advantages does a digital soft starter offer over star-delta starting?

Digital soft starters provide continuously variable voltage control, allowing precise management of starting current and torque. Unlike star-delta starters, they eliminate mechanical shock, reduce voltage dips, and can be programmed for specific load profiles.

Q5: Is the RVS-DN 390 suitable for marine applications?

Yes, the 690V rating and robust construction make this starter suitable for marine pump and fan applications where controlled starting prevents voltage disturbance to sensitive shipboard equipment.

Q6: What warranty does Auto2mation provide?

Auto2mation provides a 30-day warranty on this used Solcon RVS-DN 390 with free shipping on all orders.

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