Amveco offers custom medical power and isolation transformers (50/60Hz) with a nominal power VA of 100 to 10000. Units rated below 1000VA come with metal disk and insulating pads while those rated above are center potted.

APC's WW 10kVA Isolation Transformer has a nominal ouput and input voltage of 230V with an input frequency from 45 - 65 Hz. The maximum total current draw per phase is 60A. The unit is rack mountable.

Controlled Power Company offers a line of K-Rated Isolation Transformers range in size from 5kVA to 500kVA at 50 or 60Hz frequencies. Their SureImage Model is medical grade, with three phase sizes of 75K(i), 112.5K(i), 150K(i), and 225K(i).

Electronetics offers custom line isolation transformers at 60 or 50Hz running from a wall socket or commercial AC. Specs that can be customized are operating frequency, total power output, input voltage range (maximum and minimum), output voltage(s), output voltages at specific input voltages, and output loads.

ESP Electronic Specialists makes isolation transformers that will solve your groung loop and ground noise problems for computers, networks, POS systems, and monitoring systems. Their models use 120V, 240V or 120/240 2-phase volt output and input as well as a 120V input to 208V output model by special request.

Glentek manufactures a line of isolation power transformers for servo systems. The transformers come in either single or three phase versions. The single phase models range from 1-2 KVA of continuous power. The three phase transformers range from 3-9 KVA. Glentek also manufactures specialty transformers.

HPS Drive Isolation Transformers are manufactured for AC and DC variable speed drives. The primary and secondary windings provide electrical isolation between the incoming line and the SCR load. These transformers are designed to withstand overcurrent of 150% of the rated load for 60 seconds or 200% for 30 seconds. Standard sizes range from 5 to 600 HP is six standard voltages. Non-standard sizes are available as well. HPS offers energy efficient and standard drive isolation transformers.

IREM manufactures isolation transformers for TLC (telecommunications) facilities. Their RS Series with overvoltage protection offers high attenuation of common mode disturbances. The ARM Series of high isolation and high attenuation isolation transformers offer shielding between primary and secondary windings. These isolating transformers can stand high isolation voltages, both impulse type and at 50 Hz. The ARM2 Class II isolation transformers, compliant to Standard EN 61558-1, certified by CESVIT-CETACE, make it possible to assure both the safety of operators and the continuity of operation of the connected transmission systems.

IsolationTransformerSales.com is a distributor and manufacturer that offers whatever type of 3 phase isolation transformer you need; be it line isolation transformers, drive isolation transformers, medical grade isolation transformers, or a custom 3 phase isolation transformer built to your specifications. Three phase toroidal transformers are three separate single phase units that can be mounted as individual units, or stacked together side by side or on top of each other.

Jerome Industries manufactures 60-120VA rated desktop medical grade isolation transformers. They are built for continuous use and can handle operating temperatures between 0-40C. These units offer short circuit and overload protection, noise and/or surge protection, optional output connect configurations, and output power up to 500VA. Jerome's medical grade isolation transformers offer two input configurations; single NEMA AC outlet or double NEMA AC outlet.

The Liebert Isolation Transformer is available in three-phase, 60 Hz or 50 Hz, and capacities from 15-300 kVA. They offer multiple input and output voltage options. These units are suited for computers, telecommunications, medical, CAD/CAM, laboratory, and as a bypass transformer for UPS systems.

Mastervolt manufactures isolation transformers for marine use. The Mass GI is a small and light (only 6 kg) isolation transformer, 3.5 kVA/16A. Mastervolt’s IVET-D torroidal isolation transformers are supplied in either 16A/3.5 kVA or 30A/7 kVA versions (for 220-240V). The ‘multitap’ version works for both 230V/50 Hz and 120V/60 Hz shore voltage. There is also a heavy-duty E-Core Series (without cabinet) in a chassis version for do-it-yourself applications. The E-Core Series can be obtained with a cabinet as well. Soft Start, included with Mastervolt transformers up to 4.5 kVA, is an automatic switch that manages the current resulting from connection to the shore.

Modern Power Solutions Provider offers a variety of isolation transformers. Their Dry Type Isolation Transformer is suited for financial, educational and TV broadcast facilities, as well as office building, hospitals and health care facilities. Their Drive Isolation Tranformers are used with AC and DC adjustable speed drives that can generate mechanical stresses and harmonic currents beyond the design criteria of general puprose transformers. Their AC Isolation Transformer is used to decouple two circuits and allows an AC signal to be taken form one device and fed into another without electrically connecting the two. Shielded AC Isolation Tranformers are also available.

Neel's Noise Cut-Off Transformer cuts off noise so your machine can perform as it is designed. Switching of electrical utilities can generate spikes up to 6000 volts and high frequency power line noises. These spikes can cause thyristors, micro-processors or other active devices to fail. Also, the high frequency noises can interfere with digital equipment causing data corruption, erratic behavior, and memory loss.

Neeltran manufactures shielded transformers and drive isolation transformers. Their drive isolation transformers are built to reduce electrical noise which are characteristic of SCR drives. This transformer is designed to withstand the high electrical and mechanical stresses inherent in drive systems. Their electrostatic shield transformers are used to attenuate electrical noise which adversely affect computer operation. The typical noise rejection for these units is 130db common mode and 60db transverse mode. Double and triple shielded transformers are available.

Plitron manufactures standard and custom toroidal transformers. These three phase isolation units are designed for medical and audio specifications.

Rockwell's Allen-Bradley isolation transformers can provide both voltage change and isolation for your variable speed drive. These units are harmonic compensated and IGBT protected for optimum performance in the presence of noisy harmonics. Technical specs can be found here.

SNCmfg.com builds custom isolation transformers for OEM applications. They offer isolation transformer assemblies with a variety of specs. Primary ranges are available in 100-240 VAC, 220-240 VAC, and 360-480 VAC. Secondary ranges are available from 120-240 VAC @ 600 VAC, 220-1500 VAC, and 120 VAC - 13A. All units are available in 50/60 Hz. 

Sola HD manufactures three phase drive isolation transformers, 7.5-440 KVA, 60 Hz for SCR (Silicon Control Rectifier) variable speed motor drive applications. Isolation minimizes load disturbances caused by the SCR drive and shielding attenuates line to ground noise. There are taps on all units for adjustments to incoming source voltage. Standard designs are delta primary and wye secondary to match the common power sources required in most three phase rectifier circuits.

Suresh  Electrical Industries builds isolation transformers for medical equipment, telecommunication equipment, remote control equipment, computers & peripherals, CNC machines and analytical instruments. These ultra isolation transformers also provide equipment full protection from any kind of power disturbance, surges, spikes, shocks, etc.