中電圧ケーブル

 A: We build pretty much everything under IEC 60502-2. The usual runners are 10kV, 20kV, and 30kV. We can push it up to 35kV if that’s what your transformers need. Basically, if it’s Medium Voltage, we make it.

A: PVC is basically obsolete for MV. XLPE gives you that 90°C thermal headroom. But more importantly, it resists water-treeing. At these voltages, if you don’t have good resistance to water trees, the cable is going to fail prematurely. XLPE is just safer.

A: Think of it as a safety net. It creates a uniform electric field (so the insulation doesn’t stress out) and, crucially, it acts as the path for fault currents. If the cable gets spiked, that screen carries the current to ground so your breakers trip instantly.

A: Here’s the trade-off: Three-core saves you digging trench space—one pull and you’re done. But for big cables (like 500mm²), they are too heavy and stiff. That’s when you switch to Single-core. Just keep in mind Single-core is easier to bend but needs careful bonding.

 A: Simple rule: If you are pulling it vertically or there’s tension on the line, you need SWA. Tape armor can’t handle the pull. But if it’s just lying flat in a trench and you want protection from shovels or rocks, STA is cheaper and works fine.

A: Definitely. But specify water-blocking. We use swellable tapes inside that lock up if water touches them. For really wet areas, ask for the Al-Poly laminate sheath. It seals the cable totally—like a can.

A: We have to. It’s mandatory. We don’t ship a reel unless it passes the PD test in our shielded room. No exceptions. You want to see the graphs? We can send them with the shipment.

A: Send over your Cable Schedule. We need: Voltage, Size, and Armor type. Our guys will check the specs and get a price back to you within a day.