3BU1R

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3BU1R is a vacuum interrupter (VI). It is composed of a robust current carrying core, a dividing coil, a metal bellows, and a series of additional components including switch contact, contacts, and a self-controlling electronic module. Being applied in switchgear and circuit breakers, VI is an essential component of power industry worldwide. 3BU1R, made by ABB, is the latest innovation from the company, with the improved and improved performance, operational lifetime and economy.

The application field of 3BU1R is extended to low, medium and high-voltage switchgear and circuit breakers, power transformers, and other power apparatus. For medium voltage, the product line can be up to 40.5kV. For high voltage, it can reach up to 24kV. In addition, 3BU1Rs are suitable for AC and DC switching operations, being compatible with outdoor and indoor operation.

3BU1R is constructed with an arc-resistant material which can provide great immunity from external stress, and sustainable performance across a wide temperature range. Its construction consists of three major components: the self-controlling electronic module, the insulating material, and the solid contact. The self-controlling electronic module is made of a multilayer ceramic housing, which ensures the precise operation and zero clearance of the switch. The insulating material is also made of ceramic, designed to reduce electrical noise and offer reliable performance even in severe environmental conditions. The solid contact is made of copper, with a silver coating for better arc-resistant properties.

The working principle of 3BU1R is based on the same principles as the other vacuum interrupters. The vacuum interrupter consists of a dividing coil, a metal bellows, and several components including switch contact, which are all connected in essence in accordance with a series of electrical circuits. When a switch is activated, a current is sent through the dividing coil, creating a magnetic field in the surrounding area. This magnetism causes the contacts to open, interrupting the circuit. The electronic module plays a key role in the functioning of the 3BU1R device, by being responsible for controlling signal flow in a way that reduces noise, and by providing reliable operation even under extreme environmental conditions.

As a testament to their improved construction and performance, 3B1U1Rs provide enhanced switching properties across a wide temperature range. This in turn can lead to improved reliability and power efficiency, which ultimately leads to less downtime, increased cost savings, and improved system performance. In addition, the high insulation voltage of the 3BU1R ensures effective insulation even in harsh environmental conditions, offering increased safety and secure operation.

3BU1R provides a reliable and cost-effective solution for switchgear and circuit breakers across a number of industries. And with their improved construction and working principles, users can benefit from enhanced performance, lower maintenance costs, and improved system safety.

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