Elgar CW2501M Continuos Wave AC Power Source

The Elgar CW2501M is a 2500 VA single-phase AC power source engineered for benchtop and rackmount laboratory applications. This manual unit delivers voltage outputs from 0–135 Vrms or 0–270 Vrms with ±1% accuracy and frequencies from 45 to 500 Hz. Built on switch-mode Power Factor Corrected (PFC) architecture, it accepts universal input from 180 to 264 VAC, 47 to 63 Hz, maximizing power delivery efficiency without input range selection.

The compact 3U (5.25 inches) chassis fits standard 19-inch rack configurations and positions all output connections on the rear panel.

Technical Specifications

• 2500 VA total power


• Output voltage ranges: 0–135 Vrms at 18.6 Arms; 0–270 Vrms at 9.3 Arms


• Voltage resolution: 0.1 Vrms


• Voltage accuracy: ±1% of selected range (output > 5 VAC) Input & Frequency


• Input: 180–264 VAC, 47–63 Hz, single-phase with universal PFC


• Output frequency: 45–500 Hz (front-panel potentiometer selectable) Performance


• Total Harmonic Distortion: 0.25% typical below 100 Hz; add 0.5%/100 Hz above 100 Hz


• AC Noise: <50 mVRMS typical


• Amplitude Stability: ±0.1% of full scale


• Load Regulation: ±0.1% full scale (<10 mVRMS typical at sense point)


• Line Regulation: ±0.1% full scale for ±10% input variation (0.4 A Protection & Control


• Overvoltage, overcurrent, and overtemperature protection


• Separate output-on switch


• Standard remote voltage sense included


• Dual-speed fan for low-noise operation at reduced power levels

Key Features

• Front-panel four-digit seven-segment displays for voltage, current, and frequency readout


• Three-position LED status indication: Output On, Voltage Mode, Current Mode, Slave Mode, and Fault alarm (red)


• 10-turn potentiometers for precise voltage, current, and frequency adjustment


• Analog remote programming port (0–5 VDC signal) on rear panel


• CE marked compliance

Typical Applications Designed for single-phase AC power supply testing in laboratory and manufacturing environments requiring stable, low-distortion output and independent frequency control.

Compatibility & Integration Remote voltage sense and analog programming interface enable integration with external control systems. Output connections positioned on rear panel support clean benchtop layouts. Manual control via front-panel potentiometers requires no external interface.