Drom SVC-E-500W Servo Motor Digital Voltage Stabilizer (Single Phase)

The Drom SVC-E-500W is a precision, single-phase servo-controlled voltage stabilizer designed to deliver laboratory-grade power stability for sensitive electronic equipment. Utilizing a high-torque servo motor to continuously adjust a variable transformer, it achieves an exceptional output voltage accuracy of approximately ±1%, even with input voltage variations of up to ±50%. This digital stabilizer is ideal for protecting high-end audio/video systems, laboratory instruments, medical devices, and telecommunications equipment where even minor voltage fluctuations can cause disruption or damage.

Product Features

Exceptional Voltage Accuracy with Servo Control

Achieve near-perfect voltage stability with ±1% output accuracy. Unlike relay-based stabilizers, the servo motor provides smooth, continuous correction by physically moving a carbon brush along a transformer winding, eliminating step changes and delivering a perfectly sinusoidal, stable output.

Wide Input Voltage Correction Range

Operate reliably in areas with extreme power fluctuations. The stabilizer can correct input voltage variations of up to ±50% from the nominal voltage (e.g., from 110V to 170V for a 120V system, or 165V to 255V for a 220V system), making it highly effective in regions with very poor grid stability.

Smooth, Continuous Correction Without Waveform Distortion

Protect sensitive equipment from the harmonics and switching transients common in other stabilizer types. The servo motor’s analog correction method ensures a clean, undistorted sine wave output, which is critical for audio amplifiers, precision measuring instruments, and inductive loads.

Digital Microprocessor Control for Intelligent Operation

Benefit from smart, adaptive regulation. A digital microprocessor continuously monitors input and output parameters with high precision. It controls the servo motor driver with sophisticated algorithms for fast response, optimal performance, and includes features like soft-start and diagnostics.

High Torque Servo Motor for Reliable Adjustment

Ensure consistent performance and long-term durability. The high-torque servo motor is designed for millions of adjustments, providing reliable movement of the transformer arm even under load, ensuring the stabilizer responds quickly and accurately to voltage changes.

Comprehensive Protection Features

Safeguard both your connected equipment and the stabilizer itself. Built-in protections include over-voltage cut-off, under-voltage cut-off, overload protection, short-circuit protection, and a thermal cut-out to prevent overheating, ensuring complete system safety.

Digital Display for Real-Time Monitoring

Monitor system status at a glance. An integrated digital LED or LCD display typically shows crucial parameters such as input voltage, output voltage, load current, and system status (normal, boost, buck, fault), providing full visibility into power conditions.

Silent and Efficient Operation

Work in quiet environments without disruption. Servo stabilizers operate with a low hum from the transformer and the occasional soft whir of the servo motor, which is significantly quieter than the audible clicking of relay-based systems. They are also highly energy efficient.

Ideal for Sensitive and High-Fidelity Equipment

The perfect choice for applications demanding pure, stable power. Its high accuracy and clean output make it indispensable for protecting and powering professional recording studios, research lab equipment, medical diagnostic devices, high-end computing servers, and premium home theater systems.

Product Specifications

Model: Drom SVC-E-500W
Type: Single-Phase, Servo Motor Controlled, Digital Voltage Stabilizer
Power Rating: 500 Watts / 500 VA
Technology: Servo Motor with Buck-Boost Transformer & Digital Control Circuit

Input Voltage Range (Example for 220-240V variant):

• Correction Range: Typically ±50% of nominal (e.g., 110V – 270V for 220V nominal). Confirm exact specs.
• Operating Range: May be wider than the correction range.

Output Voltage: Stabilized to 220V or 230V (as set) with high accuracy.
Output Voltage Accuracy: ±1% (or better).
Correction Speed: Fast, continuous adjustment (Typical response: 30-50 V/sec).
Waveform Distortion: Minimal, maintains a near-perfect sine wave.

Key Internal Components:

• Variable Auto-Transformer: With moving arm (carbon brush).
• Buck-Boost Transformer: For voltage correction.
• Control Circuit: Digital Microprocessor, Voltage Sensors, Comparators.
• Actuator: High-Torque Servo Motor with driver circuit.
• Display: Digital LED/LCD Display Unit.

Protection Features:

• Over Voltage Cut-Off
• Under Voltage Cut-Off
• Overload (Current Limit) Protection
• Short Circuit Protection
• Thermal Overload Protection
• Time Delay at Startup (optional)

Display: Shows Input Voltage (V-in), Output Voltage (V-out), and often Load Current or Status.
Cooling: Natural convection (fanless) due to high efficiency and low heat generation at this rating.
Housing: Metal casing for durability and effective heat dissipation.
Mounting: Desktop or wall-mountable.

Operating Temperature: 0°C to 40°C.
Efficiency: High (>95% at rated load).
Applications: High-End Audio/Video Systems, Laboratory Test Equipment, Medical Monitoring Devices, Telecommunications Gear, Precision Computing Equipment, Studio Lighting Controls.