Tower CWY-3KVA Single-Phase AC Voltage Stabilizer

Overview

The Tower CWY-3KVA is a precision-engineered single-phase AC voltage stabilizer designed to deliver consistent, regulated output voltage under fluctuating input conditions. Built upon ferroresonant and servo-controlled hybrid regulation architecture, it maintains output stability within ±1.5% of nominal voltage (220 VAC ±10%) across input variations from 160 VAC to 250 VAC. Unlike basic surge protectors or uninterruptible power supplies (UPS), the CWY-3KVA operates without battery dependency or waveform conversion—preserving pure sinusoidal output with THD <3%, making it suitable for sensitive laboratory instrumentation, metrology equipment, analytical balances, and calibration-grade reference systems requiring clean, stable mains-derived power.

Key Features

• Robust ferroresonant core combined with high-torque servo motor-driven autotransformer for continuous, stepless voltage correction
• Wide input voltage range: 160–250 VAC, enabling reliable operation in regions with unstable grid infrastructure
• Output regulation accuracy: ±1.5% typical, verified per IEC 61000-4-11 (voltage dips/interruptions) and IEC 61000-4-30 (power quality compliance)
• Thermal overload protection with automatic cut-off and audible alarm; restarts after cooling to safe operating temperature
• Integrated EMI/RFI filtering compliant with CISPR 22 Class B emission limits
• Front-panel digital voltmeter (0.1 V resolution) and LED status indicators for input/output voltage, load level, and fault condition
• Heavy-duty steel enclosure (IP20 rated) with reinforced mounting flanges and vibration-dampening feet for benchtop or rack-mount integration

Sample Compatibility & Compliance

The CWY-3KVA is compatible with all standard single-phase 220 VAC / 50 Hz laboratory and industrial equipment drawing ≤13.6 A continuous current (at full 3 kVA load). It has been validated for use with electrophoresis power supplies, pH meters, viscometers, thermal analyzers, and low-power laser alignment systems. The unit conforms to GB/T 15438–2017 (Chinese national standard for AC stabilizers), meets CE marking requirements under the Low Voltage Directive (2014/35/EU) and Electromagnetic Compatibility Directive (2014/30/EU), and supports traceable calibration documentation per ISO/IEC 17025 requirements when deployed in GLP or GMP environments.

Software & Data Management

While the CWY-3KVA is an analog-regulated device without embedded microcontroller-based telemetry, it supports optional external monitoring via RS-485 interface (available on CWY-3KVA-M variant). When integrated with third-party SCADA or LabVIEW-based power quality logging systems, real-time voltage, current, and thermal sensor data can be archived with timestamped audit trails compliant with FDA 21 CFR Part 11 Annex 11 principles. Calibration certificates—including as-found/as-left test reports against NIST-traceable standards—are provided upon request for regulatory submissions.

Applications

• Stabilizing input power to analytical instruments requiring strict voltage tolerance (e.g., atomic absorption spectrometers, FTIR spectrophotometers)
• Protecting calibration laboratories where drift in reference standards may result from supply voltage variation
• Enabling reproducible performance of precision weighing systems (e.g., microbalances with <0.01 mg readability)
• Supporting long-duration environmental testing chambers where compressor cycling induces line voltage sag
• Serving as primary power conditioning for metrology-grade oscilloscopes and function generators used in R&D validation
• Providing clean, regulated AC for educational physics labs conducting experiments involving variable-frequency drives or magnetic field generation

FAQ

Does the CWY-3KVA provide backup power during outages?
No. It is a voltage stabilizer—not a UPS—so it does not include energy storage or switchover capability. Power interruption results in immediate output loss.
Can it be mounted in a 19-inch equipment rack?
Yes, with optional rack-mount kit (part no. CWY-RMK-01), which accommodates its 695 mm height and provides front-access ventilation clearance.
Is remote monitoring supported natively?
Standard units lack built-in communication ports; however, the CWY-3KVA-M model adds isolated RS-485 Modbus RTU support for integration into facility-wide power management systems.
What maintenance is required?
Annual inspection of carbon brushes in the servo motor, verification of autotransformer contact resistance (<5 mΩ), and cleaning of internal heat sinks using compressed air—per maintenance schedule in the technical manual.
Does it comply with international electromagnetic compatibility standards?
Yes: tested to EN 61000-6-3 (emissions) and EN 61000-6-2 (immunity), with full test reports available upon order confirmation.