News- Jiangsu Wopeng Power Technology Co., Ltd

How to Install a Tubular Bus Bar: A Step-by-Step Guide for Field Crews

Oct 27, 2026

A crew arrives at a collector substation with a dozen aluminum tubes, a crate of clamps and one day before the bay is scheduled for energization. Lifting the tubes takes about an hour. The rest of th...
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How to Choose Busbar Insulation Material: Epoxy Resin, EPDM or PTFE for 35 kV?

Oct 23, 2026

A busbar that passes its routine factory test can still fail in service when the insulation compound was matched to the wrong duty. Temperature is the clearest example: a casting rated for 130 °C con...
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How to Design a Substation Busbar Layout: Schemes, Clearances and Spacing Rules

Oct 20, 2026

A 110 kV outdoor yard is 60 metres long, the incoming line lands on the west side, and the client wants two transformer bays plus space for a future third. The single-line diagram is approved. The qu...
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How to Calculate Busbar Current Rating: Practical Formula and Derating Guide

Oct 13, 2026

On a recent 400 V switchboard upgrade, a contractor asked why a 50 × 10 mm copper busbar that looked fine on a 1000 A drawing was running at 78°C inside a closed cubicle. The busbar was not undersize...
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Fully Insulated Busbar vs Bare Busbar: A Practical Selection Guide for Engineers

Oct 06, 2026

A 35 kV substation retrofit and a 690 V wind farm collector string rarely accept the same answer, yet both teams ask the same question: bare aluminium tube on post insulators, or a fully insulated tu...
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Copper Busbar vs Aluminum Busbar: Ampacity, Weight, Cost and Fault Duty

Sep 29, 2026

A 3,200 A busway extension usually arrives with two quotations and one argument: the aluminum option is cheaper and roughly half the weight, while the copper option is smaller, matches the approved s...
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Busbar Short Circuit Withstand Rating Explained: Icw, Ipk, and IEC Standards

Sep 22, 2026

When a busbar arrives on site, the nameplate carries a group of values that look simple but are easy to misread: Icw = 50 kA / 1 s, Ipk = 105 kA. If you are the engineer responsible for the substatio...
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Copper Bar Rating Explained: Ampacity Tables, Derating and Buying Checks

Sep 21, 2026

A 100 x 10 mm copper bar is routinely quoted as a 1,500 A conductor. Put that same bar in a sheet-steel enclosure, in a plant room sitting at 45 °C, in a run with four bars per phase, and the current...
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Busbar Temperature Rise Calculation: Formula, Example, IEC and UL Limits

Sep 15, 2026

During a routine temperature-rise test, a 2000 A switchboard failed because its main busbar reached 112 K above ambient - 7 K over the limit. The conductor size had been copied from an earlier design...
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Busbar Fabrication Guide: Process Steps, Materials, and Quality Control

Sep 08, 2026

At 3 p.m. on the hottest afternoon of the year, a 4,000 A switchboard in a coastal plant trips for the third time that week. The design was sound and the breaker tested fine. The real culprit: a bol...
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Aluminum Bus Bar Ampacity Chart: Sizes, Temperature Rise and Selection Tips

Sep 01, 2026

Ask two catalogs what a 100 × 10 mm aluminum bar can carry and you may get two different answers — 800 A from one, 965 A from another. Both can be right, because an aluminum bus bar ampacity chart is...
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Copper Bus Bar Ampacity: Sizing Guide, Charts, and Buying Factors for Engineers

Aug 25, 2026

The ampacity question is also a temperature question A 100 x 10 mm copper bus bar can look like a safe choice for a 1000 A switchboard until it is installed in a sealed enclosure with other bars pac...
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