Single Phase Frequency Converters 50/60 Hz
18 models 1KVA to 20KVA
50 or 60hz input,
50hz or 60hz output
Single Phase Frequency Converters 400hz
18 models 1KVA to 20KVA
50hz or 60hz input and
400hz output
Three Phase Solid State Frequency Converters
50 or 60 Hz
57 models 10 to 320KVA
Three Phase Solid State Frequency Converters
57 models 10 to 320KVA
Solid State Design Considerations Manuals and Connection Diagrams Accessories
Outdoor Enclosures, Carts,
Distribution Panels etc.
Notes and Photos
Rotary 1 or 3 Phase Frequency Converters
50 or 60hz output
6KVA to 2000KVA
Rotary 400Hz output Frequency Converters
1 or 3phase
10KVA to 250 KVA
Rotary Frequency Converters Accessories
Enclosures (Indoor quietized and Outdoor) Digital Meters, RS232 and Data Logging, etc.
Rotary Design Considerations Starting Surge of motors in the load, Large SCR loads, power factor and resistive loads, Operating Noise Level.
Rotary Application Notes and Photos Operating Noise and solutions to this problem Line Isolation Sets
  Visicomm Industries
Solid State Frequency Converter Rotary Frequency Converter

Solid State Accessories


Battery Backup

The purpose of a battery backup for a frequency converter is to provide uninterrupted power output in the event of a utility outage for a limited time. Accordingly, when the utility fails, the unit sounds a series of beeps, and the battery light comes on to notify the user that the unit is starting to operate on battery.

The battery enclosure is designed to sit beside the frequency converter, and is furnished with a short cord that serves as a plug-in interconnection cable. The unit is shipped complete with 16 interconnected 12 VDC sealed batteries already in the enclosure.

The standard battery set will support a fully loaded (the chances are the unit will not be fully loaded at all times during a power outage) unit for:

Model Duration*

1KSS: 80 mins
2KSS: 50 mins
3KSS: 27 mins
4KSS: 12 mins
5KSS 8 mins
6KSS: 5 mins
8KSS: 3.5 mins
10KSS: 3 mins
12KSS: 2 mins

   * If longer times are required, we can provide up to 5 times as long using larger AH batteries in a slightly larger enclosure.

The batteries are not fully charged when shipped, and it is recommended that the unit be left on overnight to bring the batteries up to charge.

When using this accessory, do not attempt to shut down the converter by disconnecting the utility line - doing this will not shut down the converter, but result in a fully discharged battery.

To shut down the converter output, push the on-off switch.

A = 19.5 in (50cm)
B = 7 in (17.75 cm)
C = 14 in (36 cm)

All of out solid state units can be furnished with weatherproof outdoor enclosures. The photo shows a 3KVA unit designed to power 60 Hz tools on the tarmac at an airport in a 50 Hz country. Operating power is supplied by the airport's portable 50 Hz generators. The unit was furnished with a 50 ft. cord and plug set with strain relief. The photo shown is out of proportion, click on the photo to show a better view.

A = 34 in.
B = 18 in.
C = 28 in.
D = 47 in.

Click Image to Enlarge

Front / Right side view of the battery enclosure.

Rear / Left side view of the battery enclosure (showing plug socket).


Click Image to enlarge

Right front view.

Head-on view.

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