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PS503-1000 900W Shipboard UPS

PS503-1000 900W Shipboard UPS

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This is a Low Cost Solution for UPS needs on board any ship.

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Powerstar since 1993 PS503-1000VAreleases the short tower shaped PS503-1000VA 900W Shipboard UPS. This is a Low Cost Solution for UPS needs on board any ship. $1299. This is not a stripped down unit. It has all the features of its big brothers using high quality Liebert Electronics. True Online Double Conversion so there is NO switchover time. True Sine wave output- no humming or interference created by a Stepped Square Wave output. Frequency converting if needed. Built in Automatic Bypass circuit should the inverter fail due to overload or other problem to keep your systems with maximum Up time. Slot for SNMP Ethernet Card. Emergency Power Off Contacts. 6 outlets. A great Power Factor. Built to MIL-Std-1399. Variable speed fan. Optional Powerstar solid steel optional mounting foundation is available. Additional ruggedization is also available to bring this unit to MIL-STD901D-A and MIL-STD-167 compliance. Powerstar Premium batteries also available (8-10 year life at 25°C)

Protect the sailors, use a properly designed UPS onboard to reduce shock hazards. Use on deepwater platforms, cruise ships, drilling rigs. We can also offer Line Isolation transformers to reduce or eliminate shock hazard from a sailor touching an energized wire while standing on a wet metal deck. Read about shipboard power here.

What is this unit missing? An external battery connector for additional battery cabinets- thats it!

If you need larger runtimes than the PS503, look to the PS3070rm2u or the PS3100rm2u with all the same features but has that external battery connector for up to 4 additional 2u trays. The PS3070 or PS3100 are convertibles and can be tower or rack. See its full description in our catalog.

PS503-1000 Short Tower true online 1000VA UPS- 900 Watts output power

Built to meet MIL-std-1399

Double conversion type UPS wired for Delta power

Dual pole circuit breakers -No fuses

Dimensions 390x 175x 225mm

2 year warranty on all parts

The board / component manufacturer is certified to ISO 9001.

Frequency can be set to 50 or 60Hz or track the input frequency

Smart UPS tests itself and batteries periodically

Auto restart after a full run upon utility restoration

Cold Start capable

Field replaceable batteries through front panel while online

NOW! Output Power Capacity 900Watts @ .9pf / 1000 VA

Nominal Output Voltage 120V (configurable 100-127VAC)

Output Voltage Distortion Less than 3% at full load

Crest Factor up to 5: 1 Waveform Type Sine wave

Variable speed fan adjusts to internal temperature and limits noise- Fan is monitored for fault

Optional: Premium High temperature rated Flame proof Long Life (8-10 year) battery available.


(6) NEMA 5-15R

3% total harmonic distortion (THD) typical into a 100% linear load, 5% THD typical into a 100% non-linear load with crest factor ratio of 3:1.

>88% efficiency

Inverter Overload Capability: 200% for 10 seconds then transfer to bypass, 150% for 50 seconds then transfer to bypass

Voltage Transient Response: + 7% in line mode 0-100-0 % loading of the UPS,+ 7% in battery mode for 0-100-0 % loading of the UPS rating.

Transient Recovery Time: To nominal voltage within 90 milliseconds.

Output equipped with Automatic Bypass which connects input source to load should Inverter fail or load exceeds capacity of unit.


Nominal Input Voltage 120V

Input Frequency 40/70 Hz (auto sensing)

Input Connections NEMA 5-15P

Cord Length 10 feet (3.04 meters)

Input voltage range for main operations 60 – 144V

Transfer Time 0 ms (Inverter is always running)

Input Power Factor >.99 lagging at rated load

Batteries & Runtime

Battery Type Maintenance-free sealed Lead-Acid battery with suspended electrolyte: leak proof AGM technology – cfr49 shippable

Typical recharge time 5 hours to 95%

Powerstar Premium High temperature long life (8-10 year) batteries available for this unit

Load in Watts

200W- 28 minutes

400W- 15 minutes

600W- 9 minutes

800W- 5 minutes

900W- 4 minutes

Interface Port(s)

USB serial interface will connect directly to a PC for automated shutdown routine. Also can be controlled and inspected with supplied Liebert™ software.

Optional: Slot Interface for SNMP Network Web card PS9059– Ethernet 10/100 SNMP v1, v2c with Http interface as well as Microlink© software supplied

Control panel

LED status display with 5 LEDs showing % of load, and 5 LEDs showing % of battery charge

Additional LEDS indicate Inverter ON, Fault, On battery, Bypass mode enabled, AC input

Audible Alarm -Alarm when on battery: distinctive low battery alarm (Alarm can be silenced via push button)

Dry contacts (12v 50ma): Emergency Power Off (EPO)- Output can be disabled via shorting two pins.

Battery mode Shutdown.

Indicator- Battery mode (contacts switch when on Battery) 30ma max.

Indicator- Low Battery (contacts switch when cells are weak) 30ma max.


UPS conforms to an input line transient conforming to IEEE C62.41, Category A & B tests for 120 VAC.

MOV ratings will be 175 Volt, 90 Joules minimum connected L1-L2. The MOVs will be rated 300 Volt, 150 Joules minimum connected L-G and L2-G. The L-G and L2-G connected MOVs will have the capability of being disconnected and reconnected easily.
Dimensions and Mounting

Dimensions 15.4″x 6.9″x 8.9″

Net Weight 44 lbs. (20 kg.)

Shipping Weight 54 lbs.

Shipping Height 22 inches

Shipping Width 13 inches

Shipping Depth 14 inches

Color Black

Powerstar can supply a hull/ floor mounting plate with straps for secure hold-down. Plate can be bolted or welded to deck. PS503 Mounting Foundation weighs 35 lb. Hardware included.

Operating Environment

32 – 104 °F (0 – 40 °C) (battery dependent) –This can be -20°C +50°C with our Premium battery upgrade.

Operating Relative Humidity 0 – 95%

Operating Elevation 0-10000 feet (0-3000 meters)

Storage Temperature 5 – 113 °F (-15 – 45 °C)

Storage Relative Humidity 0 – 95%

Storage Elevation 0-50000 feet (0-15000 meters)

Audible noise at 1 meter from surface of unit <46 dBA (variable speed fan)

2 year warranty on parts and Labor

Manufactured in the USA by Powerstar


UL Standard 1778 (Suitable for Computer-Room Applications)

• c-UL

• FCC Part 15, Subpart B, Class A

• IEEE C62.41, Category A & B

• CE for both Low Voltage and EMC Directives

• ISTA Procedure 1A

• Modified for Delta Shipboard power

Powerstar also offers comparable units in a 2u rack mount case 19.7″deep-PS3070rm2u or PS3100rm2ui

Powerstar Inc. Gaithersburg, MD 20877 USA 800-209-5556

West Coast & International +1925-270-0970

+1301-948-0713+1 301-948-0713

Powerstar Incorporated CAGE 0zap8

9073 Shady Grove

Gaithersburg, MD 20877