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 Educate yourself about the dangers of 
Electric Shock Drowning (ESD)
, and learn how 
Charles Isolation Transformers are playing
a critical role in preventing ESD tragedies. 

MARINE ISOLATION TRANSFORMERS

When properly installed, Charles Marine Isolation Transformers will electrically isolate the AC shore power from the boat's AC power system.  The boat's electrical system and the grounding conductor are not actually connected to the shore-side power. There is no direct electrical connection between earth-grounded shore AC power and the onboard electrical system. The shore ground is connected to a shield that is wound between the primary (shore) and the secondary (boat) transformer winding.  The connection of this grounding wire only to the shield of the transformer isolates the boat's AC electrical system from shore. 

Compliance with independent testing lab requirements maximize safety

  • Marine UL listing ensures durability and safety
  • Greatly reduced potential for in-water shock hazard
  • Eliminates the need for polarity alarms and galvanic isolators

Superior technology guarantees top performance

  • Fully-encapsulated components and transformer windings
  • Full current carrying shield per ABYC E-11

Easy to install and use

  • Occupies less space and easier to install than most units
  • Terminal blocks for easy customer connections
  • 3.6 KVA through 12 KVA units mount to either bulkhead or deck. 24 KVA unit mounts to deck only.

Corrosion-resistant housing and components

  • Convection-cooled enclosure designed to meet NEMA 3R requirements.

ISOLATION TRANSFORMERS

Charles Part #

Product
Type

Input
Current

Input
Voltage
Range

Output
Current

Output
Voltage
Range

Dimensions* (in) /
Weight (lb)

Depth

Width

Ht.

Wt.

93-IXFMR 3/6T-A

3.6KVA
w/terminals

30A

120V
60Hz

30A

120V
60Hz

10.5

10.5

8

60

93-IXFMR 3/8I-A

3.8KVA
Int’l

32/16A

120/240V
50/60Hz

32/16A

120/240V
50/65Hz

10.5

10.5

10

70

93-IXFMR 6T-B

6KVA
Basic

50A

120V
60Hz

50A

120V
60Hz

12.75

12.75

11

155

93-IXFMR7/5T-A

7.5KVA Basic 32A 230V
50/60Hz
32A 115/230V 50/60Hz 12.75 12.75 11 155

93-IXFMR 12T-A

12KVA
w/terminals

50A

240V
50/60Hz

50A

120/240V
60Hz

16

15

12

235

93-IXFMR 12I-A

12KVA
Int’l./ Universal

50A

120/240V
50/60Hz

50A

120/240V
104/208V
50/60Hz

16

15

12

235

93-IXFMR 15I-A

15KVA
Int’l./ Universal

64A

240VAC
50/60Hz

64A

120/240V
50/60Hz

16

15

12

235

93-IXFMR 24I-A

24KVA
Int’l./ Universal

100A

200/208/
220/230/
240V
50/60Hz

100A

120/240V
104/208V
50/60Hz

18.5

20.5

17

550

97-001127-A

3.6/3.8KVA

Strain Relief Kit

97-001120-A

6KVA, 7.5KVA,
12KVA

Strain Relief Kit

97-001121-A

24KVA

Strain Relief Kit

97-001741-0

24KVA

100 Amp Strain Relief Kit

97-XFMRS0FT-A

3.6KVA, 3.8KVA,
6KVA, 7.5KVA,
12KVA

Transformer SoftStart 120V or 240V up to 50A

* DECK MOUNTED

Special custom transformers available - please contact customer service.

If you would like a copy of this and other products' detailed brochures, please fill out our Product Literature Form.


AUTOMATIC ISOLATION AND BOOSTING TRANSFORMER
Now featuring SAFEtech™ Technology!

Iso-Boost™ Automatic Isolation and Boosting Transformer for 50 & 100 Amp Service

Easy to install and use, operational status is indicated by four lights on the unit, and low-voltage bypass switch provides simple positive user control. Iso-Boost 50 occupies less space and is easier to install than separate units. Terminal blocks allow for easy customer connections. An optional remote indicator panel permits monitoring of operational status from any convenient location.

The Iso-Boost 50 Automatic Isolation and Boosting Transformer is designed to operate on 50 Amp systems. The Iso-Boost 100 Automatic Isolation and Boosting Transformer includes features similar to the Iso-Boost 50, but is designed for 100 Amp systems.

SAFEtech™ Technology — Seamless Automatic Fortified Electronics
The ultimate in marine transformer performance and safety… Automatic Isolation and Boosting Transformers with   Seamless Automatic Fortified Electronics technology can transition into boost mode or to non-boost mode seamlessly without power interruptions. Fortified electronics more accurately sense when to provide boost and when to drop out of boost. The circuitry has been designed to provide greater resistance to EMI/RFI emissions and AC power line distortion. 

  • Seamless, Automatic — Transition into boost mode or to non-boost mode seamlessly without power interruptions. 

  • Fortified Electronics — Enhanced circuitry provides greater resistance to EMI/RFI emissions and AC power line distortion 

A Charles' Automatic Isolation and Boosting Transformer equipped with SAFEtech Technology helps to ensure uninterrupted, consistent, smooth, and spike-free power is supplied to your vessel, allowing power-sensitive electronic equipment to function properly and increase its service life.

ISOLATION AND BOOSTING TRANSFORMERS

Charles Part #

Input Current

Input Voltage
Range

Output
Current

Output
Voltage
Range

Height

Width

Depth

Weight

93-ISOBOOST50-C

50A

167-255V
50-60Hz

42.5
50A

192-255V
50-60Hz

12"

15"

18"

235 lbs.

93-ISOBOOST100-C

100A

167-255V
50-60Hz

85
100A

192-255V
60Hz

21"

20"

18"

575 lbs.

93-ISOBREMOTE-A

Remote Indicator Panel

97-001121-A

Strain Relief Kit ISO-Boost 100

97-001120-A

Strain Relief Kit ISO-Boost 50

97-001741-0

100 Amp Strain Relief Kit

An Iso-Boost Automatic Marine Isolation and Boosting Transformer is essential where long dock runs cause voltage drops or fluctuations in power. The compact unit provides all the magnetic power transfer benefits of an isolation transformer, plus automatically "boosting" low or fluctuating voltages from the dock.

Iso-Boost distances itself from existing designs by meeting all requirements of ABYC E-11. Transformer windings are encapsulated and the shield providing safety between primary and secondary windings is of sufficient ampacity to provide a full fault-current path. In addition, lso-Boost 50 has been subjected to thermal, vibration and shock tests indicative of the marine environment by Underwriters Laboratories, and carries their prestigious Marine UL listing.

Internal circuitry monitors shore and boat voltages, and then adjusts output. The "boost" mode increases the isolated output voltage by 15% to supply appropriate power in the event of low voltage or wire losses during peak power times. If the dock voltage fluctuates above 225 VAC, the unit switches back to the normal isolated output. 

Compliance with independent testing lab requirements maximize safety

  • Marine UL listing ensures durability and safety
  • Greatly reduced potential for in-water shock hazard

Constant, safe, power in spite of long dock runs and voltage fluctuations protects on-board equipment

  • Permits operation of 240VAC systems from 208VAC dock supply

Superior technology guarantees top performance

  • 12 or 24KVA fully encapsulated isolation transformer and full current carrying shield per ABYC E-11.

Easy to install and use

  • Illuminated POWER, BOOST, and LOW VOLTAGE indicators and a low voltage BYPASS switch provide simple, positive user control.
  • Status indicators are also available on the optional Remote Display panel.
  • Occupies less space and easier to install than separate units.
  • Terminal blocks for easy customer connections.

Corrosion resistant housing and components

  • Housed in a convection-cooled enclosure designed to meet NEMA 3R requirements.

If you would like a copy of this and other products' detailed brochures, please fill out our Product Literature Form.

 

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