DC - AC Inverters: Uninterruptible and Standby AC Power Supplies

Wilmore DC to AC inverters feature a wide selection of AC output power ratings: 250, 500, 1000, and 2200 VA (volt-amperes). Our DC input, AC output power inverters operate from common telecom, utility and energy industry battery systems: 12, 24, 48, 125, and 130 VDC. Inverters designed for use with 36, 74, and 110 VDC railway, locomotive and rail/transit power systems are a specialty. Our DC - AC inverters include rack-mount units for use in 19" and 23" equipment racks and a variety of stand alone and portable designs. Many Wilmore DC - AC inverters include integral automatic load transfer circuitry for operation in uninterruptible or standby power modes. Also, our automatic transfer switch AC power distribution units provide back up AC power for redundant-power-source applications.

Examples of our DC-to-AC inverters are shown below. Please scroll down for descriptions of these products and links to the product bulletins.

250 VA DC - AC Inverters (1U)

Designed for space-limited applications within the telecommunications, data-processing and utility industries, the 250-VA Model 1652 DC-to-AC inverter occupies only 1.75 inches (1U) of vertical rack space. The inverter provides a well-regulated 120-VAC, frequency-stable 60-Hz quasi-sine-wave output and is available in 12, 24, 48 and 130-VDC input versions. Compatible with either 19-inch or 23-inch equipment racks, the inverter can operate at maximum rated power with simple convection cooling.

The conservatively rated Model 1652 is well suited for powering a variety of loads, from sensitive electronic equipment to small motors and other nonlinear loads. It is available as a plain inverter or with built-in automatic load switchover features to permit operation in UPS or standby-power modes.

Model 1652-48-120-60-U (Front View)

Model 1652-48-120-60-U (Rear View)

Series 1652 Product Dimensions

×

Series 1652 DC - AC Inverters

• 250 VA output power
• 12, 24, 48, and 130 VDC input voltages
• 120 VAC, 60 Hz output voltage
• Rack-mount design
• Efficient and convection-cooled
• Optional transfer switch for UPS or standby power

Dimensions given in inches (mm):

• Height 1.75”(44.45) 1 rack space

Product Bulletins (PDF Files)

• 250 VA (Series 1652)

500 VA SinewaveDC - AC Inverters (1U)

Conservatively rated, electrically rugged and highly efficient, the Series 1745 and 1765 DC-to-AC inverters provide a regulated, frequency-stable, 120-VAC sine-wave output at up to 500 volt-amperes. Standard versions of the inverters permit operation from 12, 24, 48 or 130-volt station batteries or other widely fluctuating DC sources in ambient temperatures up to 50oC. Series 1745 inverters are not metered, whereas Series 1765 inverters feature a front-panel output meter that displays voltage, current, real power and power factor.

The inverters’ low-distortion sine-wave output makes them particularly well-suited for powering sensitive electronic loads, such as telecommunication and data processing equipment (with or without power-factor-corrected power supplies), as well as loads normally considered difficult for inverters, such as small motors. Both the Model 1745 and the Model 1765 are available as a plain inverter or, optionally, as an inverter that features built-in automatic load switchover capability to permit operation in UPS or stand-by power modes.

Model 1765-48-120-60-U (Front View)
with AC Power Meter

Model 1745-48-120-60-U (Front View)

Model 1745-48-120-60-U (Rear View)

×

Series 1745 and 1765 SinewaveDC - AC Inverters

• 12, 24, 48, or 130 VDC input voltages
• 120-VAC sine-wave output at up to 500 volt-amperes
• Isolated, regulated, frequency-stable output
• Available with integral high-speed transfer switch for UPS/standby-power applications
• New!Available with or without AC power meter

Dimensions given in inches (mm):

• Height 1.75”(44.45) 1 rack space

Product Bulletin (PDF file)

• 500 VA Sine Wave (Series 1745 and 1765)

1000 VA SinewaveDC - AC Inverters (1U)

Conservatively rated, electrically rugged and highly efficient, the Series 1746 and 1766 DC-to-AC inverters provide a regulated, frequency-stable, 120-VAC sine-wave output at up to 1000 volt-amperes. Standard versions of the inverters permit operation from 24, 48 or 130-volt station batteries or other widely fluctuating DC sources in ambient temperatures up to 50℃. Series 1746 inverters are not metered, whereas Series 1766 inverters feature a front-panel output meter that displays voltage, current, real power and power factor.

The inverters’ low-distortion sine-wave output makes them particularly well-suited for powering sensitive electronic loads, such as telecommunication and data processing equipment (with or without power-factor-corrected power supplies), as well as loads normally considered difficult for inverters, such as small motors.

Model 1766-48-120-60-U (Front View)
with AC Power Meter

Model 1746-48-120-60-U (Front View)

Model 1746-48-120-60-U (Rear View)

×

Series 1746 and 1766 SinewaveDC - AC Inverters

• 24, 48, or 130 VDC input voltages
• 120-VAC sine-wave output at up to 1000 volt-amperes
• Isolated, regulated, frequency-stable output
• Available with integral high-speed transfer switch for UPS/standby-power applications
• New!Available with or without AC power meter

Dimensions given in inches (mm):

• Height 1.75”(44.45) 1 rack space

Product Bulletin (PDF file)

• 1000 VA Sine Wave (Series 1746 and 1766)

1000 VA Quasi-SinewaveDC - AC Inverters (2U)

The Model 1654 rack-mount inverter provides 1000 volt-amperes of 120-VAC, 60-Hz output power in only 3.5 inches of vertical rack space. Standard versions allow operation from 24-VDC, 48-VDC or 130-VDC battery sources. The well-regulated, frequency-stable quasi-sine-wave output is well-suited for powering sensitive telecommunications and data processing equipment, and in addition, is compatible with many loads normally considered difficult for inverters, including switch-mode power supplies, small motors and other nonlinear loads. Applications, therefore, include powering almost any critical industrial or telecommunications equipment within the volt-ampere rating of this inverter.

Conservatively designed and lightweight, this highly efficient inverter will operate continuously at any load within its rating over its full operating temperature range with simple convection cooling. The Model 1654 is available as a plain inverter or with integral automatic load switchover features to permit operation in “standby” or “on-line” UPS modes.

Model 1654-130-120-60-U (Front View)

Model 1654-130-120-60-U (Rear View)
(Rear Cover Removed)

×

Series 1654 Quasi-SinewaveDC - AC Inverters

• 1000 VA output power
• 24, 48, and 130 VDC input voltages
• 115 or 230 VAC output voltages (50, 60 or 100 Hz)
• Rack-mount design
• Efficient and convection-cooled
• Optional transfer switch for UPS or standby power

Dimensions given in inches (mm):

• Height 3.50”(88.9) 2 rack spaces

Product Bulletins (PDF Files)

• 1000 VA (Series 1654)

2200 VA SinewaveDC - AC Inverters (2U)

Designed for space-limited applications within the telecommunications, data processing and utility industries, the Model 1747 DC-to-AC inverter provides up to 2,200 volt-amperes in only 3.5 inches of vertical rack space. The inverter produces a well-regulated 115-VAC, frequency-stable 60-Hz sine-wave output (50Hz models are also available) from station batteries or other DC sources. Standard versions permit operation from either positive or negative 24-VDC, 48-VDC or 130-VDC sources because the DC input is galvanically isolated from the AC output and from the chassis. The inverter is compact, lightweight and compatible with either 19-inch or 23-inch equipment racks.

The Model 1747 is well-suited for powering a variety of loads, from sensitive communications and SCADA/telemetry equipment to loads normally considered difficult for inverters, including small motors and other reactive or high-surge loads. With the addition of Wilmore’s Model 1747-ATS automatic transfer switch, the inverter can function as the primary or backup ac source for applications requiring uninterruptible/redundant power. Conservatively designed and well-protected against external faults, the Model 1747 DC-to-AC inverter is ideal for powering waveshape-sensitive and frequency-sensitive AC loads from DC power systems.

Model 1747-130-115-60 (Front View)

Model 1747-130-115-60 (Rear View)
(Rear Cover Removed)

Series 1747 Product Dimensions

×

Series 1747 SinewaveDC - AC Inverter

• 24, 48, or 130 VDC input
• Conservatively rated 2,200 VA in two rack spaces
• Isolated, regulated low-distortion output
• Quartz clock frequency stability
• Approximately 90% efficient
• External auto-transfer switch available for UPS / redundant-power applications

Dimensions given in inches (mm):

• Height 3.50”(88.9) 2 rack spaces

Product Bulletin (PDF file)

• 2200 VA (Series 1747)
• Automatic Transfer Switch (Series 1747)

Automatic AC Power Transfer Switch (1U)

Typical applications employ a DC-to-AC power inverter coupled with commercial AC power (or a second inverter) via the transfer switch to provide an uninterruptible AC power system at equipment sites where battery backup is present such as wireless/wireline telecom facilities and electric-utility substations.

Model 1704-120-18-SW1 (Front View)

Model 1704-120-18-SW1 (Rear View)

Model 1704 SW1/SW2 (Input-Cable Plugs)

Model 1704-120-18-SW2 (Front View)

Model 1704-120-18-SW2 (Rear View)

×

Model 1704 & 1747-ATS Transfer Switch

• Automatic backup power for AC loads
• High-speed transfer circuitry
• 1U (1.75 in.) high rack-mount design

Dimensions given in inches (mm):

• Height 1.75”(44.45) 1 rack space

Product Bulletin (PDF File)

• Automatic Transfer Switch (Model 1704)
• Automatic Transfer Switch (Model 1747-ATS)

500 VA and 1000 VA SinewaveDC - AC Inverters

Compact and rugged, the 500-VA Model 1755 and 1000-VA Model 1756 DC-to-AC inverters are designed to perform equally well in stationary and mobile applications. The inverters provide an isolated, regulated 120-VAC, frequency stable 60-Hz sine-wave output and is available in 12 (Model 1755 only), 24, 48 and 130-VDC input versions. The conservatively rated Models 1755 and 1756 can operate continuously at maximum rated power over a -10℃ to +50℃ ambient temperature range. They are well suited for powering a variety of loads, from sensitive electronic equipment to small motors and nonlinear loads normally considered difficult for inverters.

The Models 1755 and 1756 are available as plain inverters or with built-in automatic load switch over features to permit operation in UPS or standby-power modes.

Model 1756-48-120-60-U (Front View)

Model 1756-48-120-60-U (Rear View)

Series 1755 and 1756 Product Dimensions

×

Series 1755 and 1756 Sinewave DC - AC Inverter

• 12 (Model 1755 only), 24, 48, or 130 VDC input
• Isolated, regulated, frequency-stable output
• Approximately 90% efficient
• Rugged, conservative design
• Available with integral high-speed transfer switch for UPS/standby-power applications

Dimensions given in inches (mm):

• 4.1" (104) high x 9.7" (246) wide x 13.6" (345) deep (excluding flanges).

Product Bulletin (PDF file)

• 500 VA (Series 1755)
• 1000 VA (Series 1756)

74VDC Input (75VA Output) DC - AC Inverters

Designed as a rugged, portable, cost-effective inverter for lower power applications, the Model 1715-74 provides 75 volt-amperes in a portable, compact enclosure. This inverter supplies a regulated, 120-VAC, crystal-frequency-stable quasi-sinewave output from a nominal 74-VDC battery source. Field proven input transient protection ensures confident operation in “harsh” battery environments. Designed for operation in a -30°C to +50°C ambient, only simple convection cooling is required. The 1715-74’s conservative design makes it particularly well-suited for powering sensitive electronic loads such as laptop computers, telecommunications and data processing equipment.

Model 1715-74-120-60 (Front View)

Series 1715 Product Dimensions

×

Series 1715 Quasi-Sinewave DC - AC Inverters

• 50 VDC to 90 VDC input range
• 118 VAC nominal output voltage (quasi-sinewave)
• 75 VA output (continuous) with surge capability
• Crystal-frequency-stable, regulated, isolated output
• -30°C to +50°C operating temperature range
• Compact, rugged and reliable

Dimensions given in inches (mm):

• 1.9 (48) high x 7.0 (177) wide x 9.0 (228) deep

Product Bulletin (PDF file)

• 74 VA Quasi-Sine Wave (Series 1715)

74 VDC Input (500VA Output) Sinewave DC - AC Inverters

Designed to power test equipment, laptop computers and other AC loads from 74-VDC locomotive battery systems, the Model 1749-74 DC-to-AC inverter provides 500 volt-amperes of 110-VAC, 60-Hz output power in a lightweight, portable package. Its high power-conversion efficiency allows the inverter to operate continuously at full power with simple convection cooling (no fans). The isolated, regulated, and frequency-stable sine-wave output is well-suited for powering a variety of loads, from sensitive electronic equipment to small motors and nonlinear loads normally considered difficult for inverters.

Model 1749-74 (Front View)

×

Series 1749 Sinewave DC - AC Inverters

• 74 VDC input
• 110 VAC nominal output voltage (sine-wave)
• 500 VA output (continuous) with surge capability
• For locomotive and rail/transit applications
• Regulated, isolated frequency-stable sine-wave output
• Input surge/transient protected
• 90% efficient, convection-cooled
• Ruggedized for portable use

Dimensions given in inches (mm):

• 8.0 (203) high x 6.4 (163) wide x 15.0 (381) deep, excluding carrying handle and rubber feet. Weight: 12 lbs.

Product Bulletin (PDF file)

• 500 VA Sine Wave (Series 1749)

DC - AC Inverters and Uninterruptible Power Supplies

These inverters are well suited for powering a variety of loads, from sensitive electronic equipment to small motors and other nonlinear loads.

Model 1716-48-120-60 (Front View)

×

Series 1716 and 1716RR
Quasi-SinewaveDC - AC Inverters

• 250 VA power rating
• 12, 24, 48, and 130 VDC input voltages
• 74 and 36 VDC input locomotive, rail/transit versions
• Electrically and mechanically rugged

Dimensions given in inches (mm):

• For Model 1716: 3.25" (83) high x 7.60" (193) wide x 11.25" (286) deep (excluding flanges).

Product Bulletin (PDF Files)

• 250 VA (Series 1716)
• 250 VA Railroad Version (Series 1716RR)

If you would like additional information about our DC-to-AC inverters or other Wilmore Electronics power conversion products, please contact us by email, telephone, or fax using the information shown on this page.