The Elgar CW1251M is a single-phase, programmable AC power source designed for testing and simulating AC power conditions across a variety of applications. It offers a power output of 1250 VA, delivering clean and reliable AC power. This unit is part of the ContinuousWave (CW) series, known for providing a good price-to-performance ratio in a compact, switch-mode design. The CW1251M can be configured for benchtop or rackmount operation and features a Power Factor Corrected (PFC) universal input voltage, which allows for maximum power delivery without manual range selection.
### Technical Specifications
**General:**
* **Manufacturer:** Elgar (also branded as Ametek)
* **Model:** CW1251M
* **Series:** ContinuousWave (CW)
* **Type:** Programmable AC Power Source
* **Phase:** Single-phase
* **Form Factor:** 2U (3.5″) high, full-rack (17″) wide, suitable for benchtop or rackmount configurations.
* **Certifications:** CE marked.
**Input Electrical:**
* **Input Voltage Range:**
* 90 – 264 VAC (for CW801M)
* 103 – 264 VAC (for CW1251M)
* 180 – 264 VAC (for CW2501M)
* **Input Current:**
* 13 ARMS max (for CW801M)
* 18.5 ARMS max (for CW1251M)
* 19.5 ARMS max (for CW2501M)
* **Input Frequency:** 47 to 63 Hz
* **Power Factor:** >0.99 typical at full load, nominal line
* **Efficiency:** >73% typical at full load
**Output Electrical:**
* **Power Output:** 1250 VA
* **Voltage Ranges:**
* 0 to 135 Vrms (low range)
* 0 to 270 Vrms (high range)
* User selectable voltage ranges
* **Current Output:**
* 9.4 ARMS (at 135 VAC range)
* 4.7 ARMS (at 270 VAC range)
* 9.26 ARMS (at 135 Vrms)
* 4.62 ARMS (at 270 Vrms)
* **Frequency Range:**
* 45 to 500 Hz (standard)
* 45 to 1000 Hz (with option H, CW-P only)
* **Output Accuracy:**
* Voltage Accuracy: ±1% of range
* Voltage Accuracy (if >5VAC): ±0.1% of range <100 Hz, ±0.2% of range >100 Hz
* Current Accuracy: ±2% of range for linear loads with current >0.2 A
* **Resolution:** 0.1 Vrms
* **Total Harmonic Distortion (THD):** 0.25% typical <100Hz, add 0.5%/100 Hz above 100 Hz
* **AC Noise Level (typical):** <50 mVRMS
* **Amplitude Stability:** ±0.1% of full scale
* **Load Regulation:** ±0.1% of full scale voltage for a full resistive load to no load
* **Line Regulation:** ±0.1% of full scale voltage for a ±10% line change from nominal line voltage**Interfaces and Control:**
* **Front Panel:**
* Two bright four-digit, seven-segment displays for voltage, current, and frequency
* Manual (CW-M) series: 10-turn potentiometers for voltage, current, and frequency adjustment
* Programmable (CW-P) series: Encoder knobs for programming voltage, current, and frequency
* Output On/Off switch
* LED indicators for: Output-on, voltage mode, current mode, fault mode, slave mode
* **Rear Panel:**
* Standard IEEE-488.2 and RS 232 control (programmable models)
* Analog programming port (0-5VDC) for voltage and frequency
* Remote voltage sense terminals
* Output connector
* Configuration dip switch
* Slave In Connector**Protection Features:**
* Overvoltage protection
* Overcurrent protection
* Overtemperature protection
* Current Limit Type: Shutdown or Foldback (configurable)
* Shutdown Delay: 0 to 3000 milliseconds**Physical Characteristics:**
* **Dimensions:** 2U (3.5") high, 17" wide
* **Cooling:** Two-speed fan with side air intake, exhaust to rear
* **Weight:** Varies by model (e.g., CW801M: 48 lbs, CW1251M: 55 lbs, CW2501M: 86 lbs)**Environmental:**
* **Operating Temperature:** 0 to 40°C
* **Storage Temperature:** -40 to +70°C**Applications:**
* Testing for real-world sine wave power conditions
* 400 Hz testing for avionics equipment
* 50/60 Hz margin testing
* Ballast testing
* Components testing
* Power supply testing for AC to DC convertersWhy Choose Aumictech for the Elgar CW1251M?
At Aumictech, we specialize in supplying high-end AC power source equipment. Whether you need reliable power simulation for avionics testing, precise frequency control for component analysis, or robust AC output for power supply validation, our team ensures the Elgar CW1251M delivers maximum performance for your application.
