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We quoted you ZW7-40.5 at 1100kg, and that’s just the weight of the unit — the porcelain pillar structure handles the whole thing, with the vacuum interrupter sitting up top in the insulator. The 40.5kV rated voltge matches your 35kV line needs, usually running at 50Hz, and the short-circuit breaking goes up to 31.5kA depending on the configuration you pick.
Most buyers go with the 1250A or 1600A rated current for typical substation work, but we’ve seen some push for 2000A when the load gets heavy — the mechancial lifetime of 10,000 operations is pretty standdard for this class. It basically handles about 20 short-circuit interruptions before you need to check the contacts (the allowable wear thickness is 3mm, which we track during maintenance).
The total breaking time is 0.1 seconds, and the operating sequence runs 0-0.3s-CO-180s-CO — so it’s fine for auto-reclosing in your rural grid application, but it’s not suited for indoor environments or high-humidity locations without additonal weatherproofing. Also, the lightning impulse withstand sits at 185kV peak, which we’ve tested dry and wet.
One thing we don’t always put in the spec sheet: the arc-extinguishing medium is vacuum, so there’s no risk of fire or explosion during fault clearing, unlike older oil-filled units. The 400A rated breaking current for capacitor switching is decent, but if you’ve got a bank with higher inrush, you might need to derate.
Lead time on these is typically 30-45 days (check current stock), and our company offer OEM/ODM with your branding on the nameplate — just send the artwork after the PO. The HS code is 85352100, and we include COA and CCC cerification with every shipment.
The standard rated current options are 1250A, 1600A, and 2000A. For custom values outside these, it depends on the volume, but we can usually adjust the design for OEM orders.
Yes, we provide type test reports covering the full insulation level, including the 185KV peak impulse and the 95KV dry/80KV wet power frequency tests. Those are part of our standard documentation package.
For a standard batch with the 31.5KA breaking current, MOQ is around 5 units, and lead time is roughly 30-45 days after order confirmation. Larger OEM orders can reduce per-unit cost.
You can measure the contact wear using a simple depth gauge or caliper on the contact surface. We do not include a special gauge by default, but we can supply one with the order if requested.
Yes, the 1100kg is for the fixed installation type. For export, each breaker is packed in a reinforced wooden crate with shock-absorbing material, and we can add custom lifting brackets if needed.
Worthy of praise on multiple fronts. The shipping was remarkably swift, with the item arriving well ahead of the estimated schedule, which was a fantastic start. Upon unboxing, the construction quality immediately stood out; the materials feel robust and durable, clearly built to withstand outdoor conditions as specified. The packaging was exceptionally secure, ensuring everything arrived in perfect condition without a single scratch. Communication from the supplier was consistently prompt and helpful throughout the entire process, from order confirmation to post-delivery follow-up. They provided clear documentation and were responsive to preliminary inquiries. While I cannot comment on the technical performance or installation specifics, the overall presentation and the professionalism observed in the logistics and customer service aspects are highly commendable. This initial experience regarding the physical product and the transactional support inspires significant confidence.
Logistics were handled exceptionally well, with the product arriving ahead of schedule and in perfect condition. The packaging was robust and secure, ensuring no damage during transit. The overall quality appears outstanding, with solid construction and premium materials that inspire confidence for long-term use in our power system. Customer service was responsive and professional, promptly addressing all pre-shipment inquiries with clear, detailed information. The entire process from order to delivery was seamless and efficient. This supplier clearly prioritizes reliability and customer satisfaction, making them a highly recommended partner for critical electrical components.
Prompt delivery and excellent packaging ensured the product arrived safely without any damage. The overall quality appears robust and well-manufactured, suitable for demanding applications. Customer service was responsive and helpful throughout the ordering process, addressing inquiries swiftly. A smooth and satisfactory procurement experience overall.
My main motivation for this review is to highlight the exceptional experience with the delivery process. My order arrived much faster than anticipated, and the packaging was impeccably secure, ensuring the product was in perfect condition upon arrival. Moreover, the overall quality appears outstanding, with robust construction and careful attention to detail. The customer service team was incredibly responsive and helpful throughout, promptly addressing all my inquiries. Many thanks for such a smooth and reliable transaction—it's rare to find such consistency in all aspects.
The delivery was incredibly fast and well-handled, arriving ahead of schedule without any damage. The packaging was secure and professional, ensuring everything was in perfect condition upon arrival. As for the quality, the materials used feel robust and durable, meeting high standards for outdoor applications. Customer service was outstanding—they were responsive, helpful, and provided clear updates throughout the process. Overall, a very satisfying experience that I'd highly recommend to others.
Outstanding experience from start to finish! The delivery was incredibly fast and well-handled, arriving ahead of schedule without any damage. The quality of the product is top-notch, with robust construction that feels durable and reliable. Customer service was exceptional—they were responsive, helpful, and went above and beyond to ensure everything went smoothly. Highly recommend for anyone seeking a seamless transaction.
Fantastic experience from start to finish! The delivery was incredibly fast, arriving well ahead of schedule, which minimized downtime for our project. Logistics were handled smoothly with clear tracking updates, making it easy to coordinate on-site. The build quality of the circuit breaker is outstanding—it feels robust and precisely manufactured, with no visible defects upon inspection. Customer service was equally impressive; the team responded promptly to inquiries and provided helpful guidance throughout the ordering process. Overall, a highly reliable supplier that I would confidently recommend for high-voltage applications.
