User manual

18
Power Supplies
AC Power
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 sinewave 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
■ 0.1 V settable resolution
■ Automatic protection against overload,
short circuit, and over temperature
■ Output ON/OFF switch
■ Bright VFD display
■ Remote programming through RS232
serial interface
■ Input power factor of 0.99 allows for
maximum power to be delivered from the
AC outlet
■ Standard 19” rack construction
■ Conforms to EN55022, class A, safety
standard EN60950
Applications
■ 50/60 Hz margin testing
■ 400 Hz testing for avionics equipment
■ Component testing
■ Characterization of AC to DC converters
The 1653A and 1655A variable isolated AC
power supplies are great for testing AC line
voltage variations or any given product
requiring AC power.
Model 1653A
■ Variable isolated 0-150 VAC
■ 2 A continuous output
■ Displays voltage or current readings
■ Isolation transformer to eliminate shock
hazard while servicing “hot chassis”
equipment
The 1604A
(single output) isolation trans-
former provides the necessary safety factor
for servicing any transformerless AC powered
equipment.
Model 1604A
■ Leakage: less than 0.1 mA
■ Output Voltage: 117-124 V nominal
(120 V input)
■ Output Current: 1.25 A continuous
Model 1655A
■ Variable isolated output 0-150 VAC
■ 3 A continuous, 4 A intermittent output
■ Built-in soldering iron temperature
control (additional AC receptacle for
soldering iron on rear panel)
■ Expanded leakage scale
■ Circuit breaker overload protection
■ Displays V, A, VA, leakage
Model 1655AModel 1657
AC Power Source
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Power supply guide
Introduction to different
power supply types and the
technology behind them, plus
related terms, specifications
and usage examples.