The Borna Niroo Karan company, by relying on the 40 years experienced of Reyhany Yazdi company, based on the preparation of high quality, standard products correspondent to update science and technology was stablished in October 2011. Borna Niroo Karan (Bornika) Co, also provide systematic and even according to customer requirements after sales service. This company with developed experience, high ability, also professional employees, has exclusive representative of top world's brand and is active in field of importing, providing and distributing of various electrical equipment. Borna Niroo Karan Co. is a member of the electrical industry syndicate and sponsor of electrical syndicate in conferences. This company is the member of vendor list of Oil, Gas, Petrochemical and Telecommunication companies proudly.

Newest Articles

What is Switch-mode Power Supplies (SMPS)

Switch-mode Power Supplies, are electronic power equipment, which include switching controller, for converting electric power to another voltage level. Switch-mode Power Supplies (SMPS) like other power supplies can be connected to one bigger source and transform energy to loads by different currents and voltages. Unlike linear power supplies, power transistors of switch-mode Power Supplies turn on and off, constantly, and as a result, these equipment have minimum loss power.

Surge Arrester

Arstr Surge (Surge Protective Devise-SPD) is the term IEC in devices that want to limit transient voltages (Transient Voltages) and currents are unusual. It has different names in different countries. sometimes the name of the technology used

Isolation Transformers and Surge Protection

There is often confusion between the roles of Surge Protection Devices and Isolation Transformers. This Technical Note attempts to clarify the applications that each is best suited to.

What is Megger

megger or insulation resistance is a device for measuring resistance up to 2 giga-ohm very big, usually up to 5 kV test voltage is to help and to measure the insulation resistance of cables, motors, transformers, generators and other electrical equipment will be, will become.


Everything starts from the sun to Earth. Sun's surface water evaporated and the cloud. Winds brought clouds to move on. Pregnant clouds on its way and if close to the ground creates lightning. Maybe lightning was one of the first meteorological phenomenon that has attracted human attention. Thunderbolt is a high-energy electrical discharge between clouds and the Earth's pregnant, be in addition to the fatalities, and injuries directly or indirectly disrupt power equipment and network equipment. This may be the emergence of "voltage" or "strong magnetic field" of equipment or animals to be huge effect and cause damages. Statistics annual damages caused by lightning, represents the destructive power of this phenomenon is normal.

Neutral Grounding Resistors (NGR)

Neutral Grounding Resistors are used in industrial power systems for resistance grounding of wye connected generators and transformers.