Ametek / Elgar CW801M AC Power Supply

The Ametek/Elgar CW801M is an 800 VA single-phase AC power supply engineered for precision power simulation and equipment testing across a broad range of voltage and frequency conditions. This manual-control unit delivers programmable output from 0 to 135 Vrms or 0 to 270 Vrms with frequency adjustment spanning 45 Hz to 500 Hz, making it ideal for validating device performance under variable power scenarios. The ContinuousWave (CW) Series design combines switch-mode efficiency with compact 2U rackmount form factor, achieving typical efficiency >73% at full load while maintaining output accuracy of ±1% for loads exceeding 5 VAC and ±2% across the full range.

Low total harmonic distortion of 0.25% typical below 100 Hz, coupled with 0.99 eliminates manual range selection and maximizes power delivery without external conditioning.

Technical Specifications

• Power Rating: 800 VA, single-phase


• Input Voltage: 90 to 264 VAC; 47 to 63 Hz (extended range 45 to 500 Hz available)


• Output Voltage: 0 to 135 Vrms or 0 to 270 Vrms user selectable; 0.1 Vrms resolution


• Output Current: 6.00 ARMS (135 VAC range), 3.00 ARMS (270 VAC range), maximum 13 ARMS


• Output Frequency: 45 Hz to 500 Hz programmable


• Output Accuracy: ±1% of range (load current >5 VAC), ±2% of range (current >0.2 A)


• Voltage Regulation: ±0.1% of full scale (load and line regulation), <10 mVRMS typical


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


• AC Noise: 0.99 at full load nominal line


• Efficiency: >73% at full load


• Cooling: Two-speed fan for reduced noise at partial load


• Dimensions: 2U (3.5"), 19" W × 20.07" D


• Weight: 48 to 86 lbs (22 to 40 kg)

Key Features

• Remote voltage sense standard; transformer-coupled output with overvoltage, overcurrent, and overtemperature protection


• 10-turn potentiometer controls for voltage, current, and frequency adjustment


• 0 to 5 V analog programming interface for remote voltage and frequency control


• Dual four-digit, seven-segment LED displays for output monitoring


• Status indicators for output-on, mode selection, fault, and slave operation


• Benchtop or 19" rackmount configuration; two-person lift recommended

Typical Applications

• Sensitivity testing to voltage and frequency variations


• Power conditioning simulation for equipment validation


• AC load testing and power source simulation


• Precision laboratory and production test environments

Compatibility & Integration Analog programming via 0 to 5 V control signal enables integration into automated test systems. Separate output on/off switch provides independent power control. Universal input accommodates global voltage standards without reconfiguration.