1657

Data Sheet AC Power Source Model 1657 The 1657 is an AC power source that provides high conversion efficiency and low distortion output. A built-in PFC provides an input power factor of 0.99 at full load. The AC source supplies up to 1500 VA through its universal line output terminal and can operate in one of two voltage ranges, 135 V or 270 V, with 0.1 V resolution. The bright display constantly monitors the output voltage, current, power and frequency and also indicates the selected range and mode of operation. The front panel interface is easy-to-use and includes a control knob for quick setting of voltage and frequency parameters. The 1657 can also be controlled remotely via RS232 interface. This 1500 VA rated AC power source is ideally suited for industrial product testing applications where power conversion or performance verifications is needed. The 19” rack-mountable design with front to rear airflow ventilation, allows for a compact form factor in automated test environments. Features and Benefits ■ Low distortion sine-wave output with programmable frequency and voltage ■ Two selectable output voltage ranges of 135 VAC or 270 VAC ■ Output frequency adjustable from 45 Hz to 450 Hz in 0.01 Hz steps Applications ■ ■ 0.1 V settable resolution ■ Automatic protection against overload, short circuit, and over temperature 50/60 Hz margin testing Output ON/OFF switch ■ 400 Hz testing for avionics equipment ■ ■ Component testing ■ Bright VFD display Characterization of AC to DC converters ■ Remote programming through RS232 serial ■ Input power factor of 0.99 allows for ■ interface maximum power to be delivered from the AC outlet ■ Standard 19” rack construction ■ Conforms to EN55022, class A, safety standard EN60950 Technical data subject to change © B&K Precision Corp. 2012 w w w.bk prec ision.c om AC Power Source Model 1657 Front Panel Operation Range indicator LOW for 135V range, HI for 270V range Adjustment knob V-SET button VFD di spl ay VFD simultaneously displays all output parameters and settings FREQ-SET button LOCAL button RANGE button Remote / Local indicator REMote means AC source is controlled via RS232, LOCal indicates front panel control Output ON/OFF button Output ON/OFF LED indicator Alarm LED indicator RESET button Rear Panel RS232 DB-9 serial port Universal AC output socket 2 Earth ground terminal Fuse holder AC line input w w w.bk prec ision.c om AC Power Source Model 1657 Specifications Mode l 16 57 In put Voltage Frequency Current Power factor Efficiency 90 – 264 VAC single phase 100 – 264 VAC for continuous full load operation 47 – 63 Hz 20 A max. 0.99 typical at 115 VAC, 60 Hz, full load > 85% at full load & nominal line input Out put Pow er Maximum Power Accuracy Resolution Out put Volt ag e Low Range 1500 VA ±2% of F.S. 1W 0 - 135 VRMS High Range 0 - 270 VRMS Accuracy Resolution ± 1% of F.S. 0.1 V < 2% @ 220 VRMS,50 Hz, full load Distortion Line Regulation Load Regulation Temp Coefficient Out put Curren t Worst case: < 5% @ 270 VRMS, 450 Hz, full load ± 0.1% of F.S. ± 1% of F.S. 0.05% per °C from 25 °C Low Range (135 V) 12 ARMS (Limited to 1500 VA) High Range (270 V) 6 ARMS (Limited to 1500 VA) Accuracy Resolution Crest Factor Power Factor Out put Frequency Range Accuracy Resolution Supple me ntal Characte rist ics Protection Output Connector Cooling Weight Dimensions Safety & EMC Env iro nment al Operating Temperature Storage Temperature Humidity ± 1% of F.S. 0.01 A 3 0.8 Lag to 0.8 Lead 45 – 450 Hz 0.2% of F.S. 0.01 Hz Output Trip with Alarm indication for Overload (OL), Short Circuit (SC), and Over Temperature (OT) Universal socket Internal forced front to rear cooling Note: Provide sufficient space around air inlets and outlets for proper cooling approx. 24 kg (53 lbs) 88.0 mm (H) x 482.6 mm (W) x 500.0 mm (D) 3.46” (H) x 19”(W) x 19.7” (D) EN60950 & EN55022 Class A 0 °C to 45 °C -20 °C to 60 °C < 90% non-condensing One Year Warranty Included accessories Power cord, Instruction manual Note: All specifications apply to the unit after a temperature stabilization time of 15 minutes and are tested at the output terminal with temperature at 25 °C ± 5 °C, nominal input of 120 VAC/230 VAC and output of 250 VAC/125 VAC, and at 50 Hz/60 Hz with a resistive load. Specification and information are subject to change without notice. 3 v010912 w w w.bk prec ision.c om