Simran THG 750 2Way -Heavy Duty 750 Watts Conituous Use step Up Down Voltage Converter Transformer - AC 110V/220V for Worldwide Use.

by Simran

Product Details

• Product Dimensions: 7 x 4 x 5 inches ; 10 pounds
• Shipping Weight: 12 pounds (View shipping rates and policies)
• ASIN: B000MXS9O4
• Item model number: THG 750 2 WAY
• Average Customer Review: 3.5 out of 5 stars  See all reviews (13 customer reviews)
• Date first available at Amazon.com: January 26, 2007

Product Description

750 Watt maximum capacity heavy-duty continuous use transformer » Converts 220/240 Volts down to 110/120 Volts » One grounded outlet in front of unit (accepts 3 or 2 prong US and Euro plugs) » Hard wired with a European Shucko plug also good for Asian outlets » Built-in fuse protection » Durable design with a heavy-duty cord Weight: 10 Lbs Dimensions(LxBxH): 7" X 5" X 4" Transformer Purchase Guide: Remember to leave at least a 100% slack for the transformer. For the TVs, the power surge margin is 5 times the wattage of the TV. Heating appliances, laser printers and power tools spike when you turn them on. For these products you need to buy a transformer that is at least 3 times the items capacity.

Customer Reviews

Most Helpful Customer Reviews

42 of 42 people found the following review helpful:

1.0 out of 5 stars Beware of using these transformers..., February 16, 2009

By 

CraigLee (Annapolis, MD) - See all my reviews

This review is from: Simran THG 750 2Way -Heavy Duty 750 Watts Conituous Use step Up Down Voltage Converter Transformer - AC 110V/220V for Worldwide Use. (Electronics)

My company deployed several of these units at overseas locations. One location had a problem with a unit getting very hot, so I brought it into the lab for analysis. What I found was appalling. Every solder joint was cold and a slight tug was able to break it loose or break the few remaining wire strands loose from the joint. Most joints had nearly half of the wire strands broken away from the soldered connection. This effectively cut the current carrying capacity in half.

I then pulled every unit from our stock room (approximately 12) and individually opened them for inspection. Without exception, everyone was of equal crappiness.

After reworking every connection in every unit, I set one up for bench testing. I ran the unit at 50% of the rated power for 4 hours and noticed no anomalies. I then increased the load to approximately 90% of the rated value and within 30 minutes the plastic 110V connector on the front of the unit began to melt, so I shut the test down.

The model that I tested was the Simran 3000 watt unit, but I have no doubt that every model that comes from that company is of equal workmanship. The units are built in China, with blatantly unqualified labor.

If you are handy with a soldering iron, these units can be made to do what they are supposed to do. That's why I gave it one star. I would, UNDER NO CIRCUMSTANCE, use one of these things without opening and reworking it first. I would also de-rate its maximum rating to 60%. In other words, I would not operate the 750 watt unit at loads over 450 watts. Be warned, this is a dangerous piece of junk if not reworked!

11 of 12 people found the following review helpful:

2.0 out of 5 stars Dead on arrival, poor workmanship, December 7, 2008

By 

H. Phung "cozyozy" (CA, USA) - See all my reviews
(REAL NAME)   

This review is from: Simran THG 750 2Way -Heavy Duty 750 Watts Conituous Use step Up Down Voltage Converter Transformer - AC 110V/220V for Worldwide Use. (Electronics)

I bought this unit recently with the intention of giving it to someone oversea. The unit arrived with a large dented front (where the socket is), most likely due to inadequate packaging. Only loose foam was used and the unit would work it way down the bottom of the box in no time due to its huge weight and what happened during the entire journey was not hard to imagine.

So before taking it oversea, I though I should give it a good check. I set it to Down Convert mode from 240V to 120V which was the mode it was intended to be used. Then with an Ohm meter I check the input and out resistance. The input resistance was about 7 Ohms but the output resistance was open circuit, instead of about 3.5 Ohms, half of the input side. Next I checked the Protective Earth from I/P to O/P, and instead of getting less than 1 Ohm of resistance, I measured 33 Ohms.

I removed the four nuts to open both front and back cover, and immediately spotted a dangling wire which was not attached to anything. This turned out to be part of the output which explained why the O/P was open circuited. Most solder joints were not done right, they all used solder as glue to attach wire to terminal or to other wires, instead of putting the wire through the hole of the terminal first before soldering (in the case of wire to terminal); or twisting two wires together first before soldering them together. Also, the solder joints did look "dry" and off, some did not have enough solder. Whoever did the soldering job did not receive proper training or did not have good equipment to do the job.

The Protective earths from the I/P to the O/P relied on the long screw to connect them together. The screw had low resistance alright, but the lug that loop through the screw did not make direct and good contact to the screw, partly due to the glue that was used as insulation on the lamination of the iron core. The glue somehow hold the lug mid way and stop it from making contact to the screw.

On the plus side, the winding looked solid with adequate glue applied to them as well as the lamination core.

5 of 6 people found the following review helpful:

4.0 out of 5 stars works great but very heavy, April 2, 2008

By 

Sally Fischer "sallymf" (USA) - See all my reviews

This review is from: Simran THG 750 2Way -Heavy Duty 750 Watts Conituous Use step Up Down Voltage Converter Transformer - AC 110V/220V for Worldwide Use. (Electronics)

Does the job, good and consistent and great value for money. One negative is that it is very heavy! So you can't really travel with it unless you REALLY need to but it's very easy to use and switch from step up and step down.