Elgar CW1251P Data Sheet

The front panels have two bright four
digit, seven segment displays. The
Power Factor Corrected (PFC) universal
input voltage allows maximum power
to be delivered from an AC outlet with­out the user selecting the range. Fully
rated current is delivered for either
output voltage range of 135 VAC or
270 VAC over a standard frequency
range of 45 to 500 Hz (45 to 1000 Hz
with option H, CW-P only). Custom
output voltages are available (consult
factory for details).

A separate output-on/off switch
controls power to the load. Remote
voltage sense is standard. Transformer
coupled output is protected against
overvoltage and over-current. The unit
is also protected against over-tempera­ture conditions. A two-speed fan
results in quieter operation at lower
power levels. All models have the CE
Mark. UL Models available.

T

he ContinuousWave (CW) Series of

AC power sources provides clean
single phase power at an impressive
price/performance ratio. These com­pact switch mode sources come in two
series, manual (CW-M) or
programmable (CW-P) with standard
IEEE-488.2 and RS 232 control. Both
the manual and programmable models
can be field configured for three phase
operation or used in parallel (including
parallel - three phase) with optional
factory supplied cables. Both series
have three power levels, 800 VA,
1250 VA and 2500 A. The 800 VA and
1250 VA models are 2U (3.5") high
and allow the unit under test to be
connected to the front or rear panel.
The 2500 VA model is 3U (5.25") high
with rear panel output connections. All
models can be operated in a benchtop
or rackmount configuration.

Programmable AC Power Sources

ContinuousWave

Series

CW Applications

The Continuous Wave Series of AC
power sources provides clean sin­gle phase power at an impressive
price/performance ratio. It is
designed for testing single or
polyphase electronics and has
extensive programming features.

Key Features:

• Three phase operation

Easily slaved for 3 phase output

• High frequency output

45 to 500 Hz standard
45 to 1000 Hz available

• Advanced measurement

capability (CWP only)

Peak amps
Crest factor
Watts & VA
Power factor

• Wide AC input range

Power factor >.99
90 VAC to 264 VAC on CW801
103 VAC to 264 VAC on CW1251
180 VAC to 264 VAC on CW 2501

• Excellent Output stability

+/-0.05% of full scale

Powerful Solutions

Front Panel

Power On/Off Switch

Voltage Controls

Current & Frequency Controls

Fault Lamp

Output Switch & Universal Connector

(CW 801 and CW 1251 only)

Overvoltage Set Screw Slave Lamp

Rear Panel

Strain Relief

Configuration

Dip Switch

Slave In Connector

Output Connector

with Protective Cover

External Control Connector

Slave Out Connector

Protective Earth Connection

Input Connector with

Protective Cover

Front Panel

Power On/Off Switch

Voltage & Power Controls

Current/Frequency Controls

Output Switch & Universal Connector

(CW 801 and CW 1251 only)

Fault Lamp

CW Manual

CW Programmable

Rear Panel

Strain Relief

Output Connector

with Protective Cover

Analog Slave

Protective Earth Connection

Input Connector with

Protective Cover

Menu & Status Controls

IEEE-488.2 Connector

RS 232 Connector

Slave In & Out Connectors

CW Specifications Manual (M) Programmable (P)

OUTPUT

Power

CW 801 800 VA
CW 1251 1250 VA
CW 2501 2500 VA
Power factor of load 0 lag to 0 lead
Phase All models single phase output

Voltage

Ranges 0 to 135 VRMS or 0 to 270 VRMS, user selectable

(consult factory for custom output voltages)

Accuracy ±1% of range (>5 VAC out) ±0.1% of range <100 Hz, ±0.2% of range,

>100 Hz (>5 VAC out)
Resolution 0.1 VRMS
Total Harmonic Distortion 0.25% typical <100 Hz add 0.5%/100 Hz above 100 Hz
AC Noise Level <50 mVRMS typical for CW 801 & CW 1251, <100 mVRMS typical for CW 2501
Amplitude Stability ±0.1% of full scale over 8 hours at constant ±0.05% of full scale over 8 hours at constant

line, load and temperature after 15 minute line, load and temperature after 15 minute

warm-up typical warm-up typical

Load regulation ±0.1% of full scale voltage for a full resistive load to no load

(<10 mVRMS typical, measured at point of sense)

Line regulation ±0.1% of full scale voltage for a ±10% line change from nominal line voltage

(<5 mVRMS typical, measured at point of sense)

Remote voltage sense Compensation for up to 5 VRMS total lead voltage drop

Current

CW 801 6.0 ARMS in 135 VAC range or 3.0 ARMS in 270 VAC range
CW 1251 9.4 ARMS in 135 VAC range or 4.7 ARMS in 270 VAC range
CW 2501 18.6 ARMS in 135 VAC range or 9.3 ARMS in 270 VAC range
Accuracy ±0.5% typical ±0.6% max
Resolution 0.1 ARMS 0.01 ARMS

Frequency

Range 45 to 500 Hz (45 to 1000 Hz optional on programmable unit only)
Accuracy ±0.5% typical ±0.02% max
Resolution 0.1 Hz 0.1 Hz, 0.01 Hz for remote programming

Manual CW Features

The manual series front panel knobs
(10 turn potentiometers) allow quick
adjustment of voltage, current and
frequency settings. Frequency and volt­age can also be programmed remotely
using a 0 to 5V analog signal. LED's
indicate: output-on, voltage or current
mode operation, fault and slave
modes. Models can also be paralleled
in the field or configured for three
phase operation using an optional
factory supplied cable. Current shut­down or foldback modes can be
selected from a rear panel switch.

Programmable CW Features

Front panel encoder knobs allow
programming of voltage, current and
frequency settings. Programmed or
measured values can be viewed on the
two LED displays through push button
selection. Menu push buttons enable
setting system configuration including
parallel or three phase operation. This
menu also allows setting current shut­down or foldback modes. Remote
IEEE-488.2 and RS 232 control
interfaces are standard. LED’s
indicate: high or low range output volt­age, measure or program mode,

voltage or current mode operation and
output-on. LED’s indicate menu/status,
remote control, lockout and fault
conditions. Digital Signal Processing
(DSP) based measurements include
voltage, current (amperes, peak
amperes, crest factor), power (watts,
VA and power factor) and frequency.

CW Specifications Manual (M) Programmable (P)

Phase Angle

Range -359 to +359 degrees. Positive phase

indicates time lag from reference
Accuracy within 100 microseconds of equivalent angle
Resolution 1 degree

MEASUREMENT

Voltage

Range 0 to 270 VRMS
Accuracy ±1% of range (>5 VAC out), ±0.1% of range <100 Hz, ±0.2% of range

measured at point of sense >100 Hz, measured at point of sense (>5 VAC out)

Resolution 0.1 VRMS

Current*

Range
CW 801 0 to 6.0 ARMS
CW 1251 0 to 9.4 ARMS
CW 2501 0 to 18.6 ARMS
Accuracy ±2% of range for linear loads with current ±0.6% of range for linear loads with current

0.2A for 800 VA & 1200 VA, 0.4Afor 2500 VA 0.2A for 800 VA & 1200 VA, 0.4Afor 2500 VA

Resolution 0.1 ARMS 0.01 ARMS

Peak Current*

Range
CW 801 0 to 25A
CW 1251 0 to 35A
CW 2501 0 to 70A
Accuracy ±2% of range
Resolution 0.1A

Frequency

Range 45 to 500 Hz (45 to 1000 Hz optional on programmable unit only)
Accuracy ±0.5% of reading ±0.02% of value
Resolution of display 0.1 Hz

Power*

Range
CW 801 0 to 800W
CW 1251 0 to 1250W
CW 2501 0 to 2500W
Accuracy ±2% of range for linear loads
Resolution 1W

Apparent Power*

Range
CW 801 0 to 800 VA
CW 1251 0 to 1250 VA
CW 2501 0 to 2500 VA
Accuracy ±2% of range for linear loads
Resolution 1 VA

*Note: In a parallel system (for programmable units only), the current/power displayed on the master unit is the sum of all units in the system.

CW Specifications Manual (M) Programmable (P)

Power Factor

*
Range 0 to 1
Accuracy ±4% of range for linear loads
Resolution 0.01

Crest Factor*

Range 0 to 3.5
Accuracy ±5% of range
Resolution 0.01

FRONT PANEL

Displays & Indicators

Menu/Status Green LED for output on, V mode, I mode, slave Green LED for remote and lockout, voltage mode,

Red LED for fault current mode, red LED for fault

Enter/escape buttons are present for programming
Voltage 4 digit display, green LED (volts) 4 digit display, green LED (volts, watts, VA, PF, OVP)
Current/Frequency 4 digit display, green LED (amperes) 4 digit display, green LED (amps, Hz, Pk amps,

CF, I Limit)
Program/Measure Green LED (amps, Hz I Limit)
V Range High/Low Green LED

INPUT

Voltage and Frequency

CW 801 90 to 264 VAC, 47 to 63 Hz, single phase
CW 1251 103 to 264 VAC, 47 to 63 Hz, single phase
CW 2501 180 to 264 VAC, 47 to 63 Hz, single phase

Current

CW 801 13 ARMS max
CW 1251 18.5 ARMS max
CW 2501 19.5 ARMS max
Power Factor >0.99 typical at full load nominal line
Efficiency >73% typical at full load

GENERAL

Regulatory Compliance CE Mark
Dimensions

CW 801 and CW 1251 2U 3.5" H (89 mm) x 19" W (483 mm) x 20.6 D (524 mm)
CW 2501 3U 5.25" H (133 mm) x 19" W (483 mm) x 20.6" D (524 mm)

Weight

CW 801 48 lbs (22 kg)
CW 1251 53 lbs (24 kg)
CW 2501 86 lbs (39 kg)

Shipping Weight

CW 801 56 lbs (25 kg)
CW 1251 61 lbs (28 kg)
CW 2501 94 lbs (43 kg)

Environmental

Cooling Dual speed fan with side air intake, exhaust to rear
Operating Temperature 0 to 40°C
Storage Temperature -40 to 70°C
Humidity 0 to 85% at 25°C derate to 50% at 40°C (non condensing)
Altitude Operating full power available up to 6,000 feet, non operating to 40,000 feet

* Note: In a parallel system (for programmable units only), the current/power displayed on the master unit is the sum of all units in the system.

CW Model Number Description

CW 801M - S

Series Options

Maximum Power Single Phase

M = Manual
P = Programmable

• Self Test: Indicates Pass/Fail after Power-on Self Test

• GPIB Port: Set 1 to 31 GPIB Addresses

• Current Limit Type: Specify Current Shutdown or Foldback

• Shutdown Delay: Specify 0 to 3000 millisecond shut-

down delay

• Program Keys Locked Mode: Specify whether to lockout

front panel controls

• Recall Settings: Recall 0 to 99 stored system parameters

(see Store Settings)

• Relay State After Power Up Initialization: Specify

whether to automatically close output power relay after
power up

• RMS Voltage Loop: Specify whether the RMS voltage

loop is on or off

Ordering Information

Model Number Output (Single Phase) Input (Single Phase)

Maximum Power Maximum Current Voltage (47-63 Hz)

135V 270V

CW – Manual

CW 801M 800 VA 6.0A 3.0A 90 to 264 VAC
CW 1251M 1250 VA 9.4A 4.7A 103 to 264 VAC
CW 2501M 2500 VA 18.6A 9.3A 180 to 264 VAC

CW – Programmable

CW 801P 800 VA 6.0A 3.0A 90 to 264 VAC
CW 1251P 1250 VA 9.4A 4.7A 103 to 264 VAC
CW 2501P 2500 VA 18.6A 9.3A 180 to 264 VAC

Options & Accessories

H: Extended frequency range 45 to

1000 Hz (CW-P only)

L: Locking shafts (front panel

potentiometers) (CW-M only)

S: Sync In/Out (clock/lock)

(CW-M only, standard on CW-P)

V: Extended voltage range 0-155V, 0-310V

(CW-P only)

Rack Slide Kit

Elgar Part No. K161570-01

Multi-Unit Cable

Elgar Part No. 890-497-40
Required for parallel and paralleled
polyphase CW-M and CW-P systems

Digital Expansion Cable

Elgar Part No. 890-499-00
Required to configure any parallel or
polyphase CW-P system

7/03

Product specifications are subject to change without notice.

CWP Programming Menu Commands Description

• Analog Input State: Specify whether an analog input

signal will program the output amplitude through the
internal DSP-based waveform

• Store Settings: Store 0 to 98 system parameters:

- Volts

- Frequency

- Current Limit Type (shut/fold)

- Current Limit Shutdown Time

- Programming Keys Mode (enabled/disabled)

- Voltage Range (low/high)

- Overvoltage

- Analog Input (on/off)

- Clock Signal Direction (input/output)

• Clock Direction: Specify whether the clock port outputs a

clock pulse or is set to receive input synchronization
pulses

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