◆Non-Flammable & No Pollution
The insulation mass, namely the special compound epoxy resin with conductor material is fire resistant and self-extinguished. In the event of a fire in the surrounding area, the thermal mass of the ” MAX-AN ” cast resin transformers are very low and no permanently dangerous flue gases are given off.

◆ Maintenance Free
Normally cast resin transformers are maintenance free. Only the transformers provided with additional fans should be checked at intervals. In the case of dusty environments, cleaning must be carried out to insure that the cooling ducts will not become clogged.

◆ Highly Dielectric Strength
The cast resin transformer has good resistance to moisture. It has highly dielectric strength of oil-immersed transformer. Even under short-circuit conditions, the transformer is excellent. This is achieved by the strength of hardened resin of H.V. and L.V. windings

◆ Overload Capacity
The integration of the foil windings and the epoxy resin insulation provides a heavy heat resistance, resulting in a short-duration overload capacity. With forced air cooling fans, the rating can be increased by 40%

◆ Quiet Operation
The new adapted design of the core and a special construction of the ”MAX-AN”cast resin transformer gives a remarkably low noise level

◆ Corona-free, Long Service Life
The transformer discharges no corona at all in its range of working voltages, so there is no insulation deterioration due to coronas, resulting in a long service life.

◆ Resistant to Aggressive Atmospheres
The quality of ”MAX-AN”cast resin transformer is excellent. It can resist even under aggressive atmospheres and free of shrinking cracks.

◆ Economical & Easy Installation
The transformer can be installed close to the load center. There are no special requirements for fire protection. It has a much smaller power loss than other type transformers, enabling a considerable reduction in operating cost.

◆ Applied Fields
Office and apartment building, hospitals, school, hotels, department store, underground shopping malls.
Utility office, oil refinery plant, airport, subway, sewerage.
Steel industry, chemical and food industries, paper and textile industries.
Tunnel, vessels.

◆ Fire Testing:

According to JIS-K6911,5.24.1 by A method, Tai-wan Bureau of Commodity Inspection and Guarantee carried out fire testing on specimens of ” MAX-AN ” windings.

Test result: Non-flammable

( report number: 90305 - 11753)

◆ Cracking I Damp Heat Testing:

According to JIS-C4306 1991, Automotive Research & Testing Center carried out cracking and damp heat testing on ” MAX-AN ” cast resin winding.

Test result: Appearance normal, no damage, non-cracking.

◆ When the temperature of the cooling air is lower than the limit allowed for the insulation class of the windings, the output power of the transformer can be higher than the nominal one. If the temperature of the dielectric does not exceed the admissible limit value allowed by their class, the transformers are not subject to any damage or early ageing phenomena. On the other hand by reducing the value of the selected power relative to the nominal one, the transformer can also be used without any problems with higher air temperature like for example those in tropical climates. The graph shows the curve which indicates the power to be selected as a function of the air temperature.

◆ In relation to the initial load and ambient temperature, the cast resin transformer can allow an overload for short periods. The figures on the curves indicate the temporary overload permitted as a function of the duration of the overload for room temperatures at 20 ° C and 40 ° C respectively.

◆ Dial type thermometer with one contact for alarm or trip circuit.

◆ Temperature control by means of thermistor with two contacts, the first one gives an alarm if the temperature exceeds the value on which normal life expectancy is based, the second system is adjusted to the temperature class to avoid accelerated aging. At this limit temperature, the

the transformer should be tripped.

Standard Specifications

Standard specifications

◆  Rated capacity : Up to 5000KVA

◆  Rated voltage : Up to 23kV

◆  Tappings : ± 2X2.5%(others on request)

◆  Rating frequency : 60Hz or 50Hz

◆  Ambient temperature : Max. 40 ℃

◆  Vector group : For 3 phase:Delta/Star with neutral(Dyn11) or others on request.

For single phase:Subtractive.

◆ Standard : CNS 13390,C4468 or IEC726(other standars NEMA, ANSI, BS and DIN on request).

◆  Cooling : Natural cooled (with forced ooling fans, rating can be increased by 40%).

◆  Temperature rise : according to insulation class F or H.

◆  Remarks : other deviations on request.

◆ Accessories

Designed by Maxwell Electric Co. LTD.

Copy Right 2021