Amran products are manufactured by using high quality raw materials and by adopting well defined and controlled processes.

It all starts with the selection of grain-oriented silicon steel cores. High accuracy, low loss electrical steel is chosen by our engineers based upon application and customer specific requirement. Annealing process is carried out to relieve stresses on the molecular structure and to ensure grain orientation in magnetic direction. Annealed cores are insulated with various insulating methods – i.e. tape, plastic caps, coating etc. Copper wire is wound around these insulated cores in a uniform and evenly distributed manner using various winding machines. This yields products with high accuracy and low losses. Depending on the type of products and system voltages, we undertake outer insulation process to provide most suitable outer encapsulation.

Medium Voltage Products are manufactured the with state-of the art resin (epoxy or polyurethane) molding method. Vacuum encapsulation is ensured using customized resin mixing and pouring equipments. Vacuum pouring is done under controlled temperature to ensure uniform, bubble-free and particle free construction that ensures long insulation life

Amran CTs and PTs are designed and produced to meet with ANSI C57.13 Or IEC 60044 Or customer specific test standards and requirements. Whether your requirements are for metering or relaying or simple instrumentations/measurements, Amran ensures compliance with the required accuracy by using appropriate test method to measure RCF (ratio error) and phase angle. Required linearity and excitation characteristics are also ensured by testing the products for different V/I test levels on our test benches. Attached ANSI data show such limits. Partial discharge test is a routine test at Amran and MV products meet with either CAN3-C13-M83 or IEC standards for partial discharge. Amran products are also tested for all other routine tests such as Hi-pot, Polarity, Linearity etc. Type tests are carried out on numerous models to ensure that the design works for parameters such as BIL, Short time thermal current, etc.

Please click on the attached sub-links on the left side of this page to get more details on each product type.

CT ACCURACY LIMITS	CT EXCITATION CURVES	VT ACCURACY LIMITS

* Above graphs are reprinted with permission from IEEE Std. C57.13-1993, [IEEE Standard Requirements for Instrument Transformers] by IEEE. The IEEE disclaims any responsibility or liability resulting from the placement and use in the described manner. Copyright 1993 IEEE. All rights reserved.*