Analysis of common failure causes of low voltage switchgear

1. A short circuit occurs inside the switchgear.

1) The insulating base of the busbar support insulator or the plug-in contact is dirty, heavily wetted or mechanically damaged, causing a short circuit due to flashover or discharge. The cleaning should be strengthened, and the equipment should be replaced in time for the equipment to be damaged due to moisture.

2) Improper selection of electrical components, such as insufficient breaking capacity of the circuit breaker. The breaker with the right capacity should be selected.

3) Misuse. What often happens is the isolating switch with load operation. The operating procedures should be strictly implemented to prevent misuse.

4) The inspection tool is forgotten on the busbar. After the power failure overhaul, the maintenance tools such as the wrench and the screw driver were forgotten on the busbar due to negligence. The power supply was not carefully checked before the power transmission, and a short circuit occurred after the power transmission. Strictly in accordance with the requirements of the regulations, after the inspection, check the tools to prevent forgetting.

5) Small animals cause a short circuit. Short circuits are caused by small animals (such as mice, snakes, etc.) drilling into the switch cabinet. Install a protective net to prevent small animals from drilling in.

2. The busbar connection is overheated.

1) Poor contact. Measures such as transfer load, power failure overhaul or replacement of the busbar can be used.

2) The butt Bolt is too tight or too loose. When tightening, the degree of tightness should be appropriate, generally tightened until the spring washer is flattened.

T Picket

Hot Rolled Tee Bar Studded T Post : T Picket/Fence post

Material : Q235 steel /rolled steel

Usuage : mainly for garden ,fence ,vineyard

Surface treatment : Powder coated

Colorful paint in red or green with cream-color top



Zinc-coated to resist rust and corrosion

Studded T post,Fence post

MEASUREMENT

SPEC

5`

5.5`

6`

6.5`

7`

8`

10ft or other customized length

pct/mt

pct/mt

pct/mt

pct/mt

pct/mt

pct/mt

LIGHT DUTY

0.95lb/ft

464

422

386

357

331

290

1.10lb/ft

400

364

334

308

286

250

REGULAR DUTY

1.15lb/ft

383

348

319

295

274

239

1.25lb/ft

352

320

294

271

252

220

HEAVY DUTY

1.33lb/ft

331

301

276

255

237

207

1.50lb/ft

291

268

243

227

210

184

Studded T post that's easy to install,no holes to dig

Made of recycled material

Anchor plate locks the t-post straight and secure in any type of soil

Coated with rust-resistant water-based baked enamel paint

Hot dip galvanize coating more than 65um

More durable

Export to USA markets

T Picket

T Picket,T Post,Steel Fence Post,Studded T Post

BAODING JIMAOTONG IMPORT AND EXPORT CO., LTD , https://www.chinagroundscrew.com