| Brand | ROCKWILL |
| Series | RDS |
| Rated voltage | 40.5kV |
| Rated current | 630-3150A |
| Rated short-time withstand current | 25-40kA |
| Rated frequency | 50 / 60Hz |
The RDS series outdoor high-voltage disconnector is designed for 40.5 kV (35 kV nominal) three-phase AC power systems. It is used for no-load line switching and isolation of high-voltage equipment, providing a visible isolating gap for safe maintenance.
The disconnector adopts a double-post horizontal center-break design. Each pole consists of a base, two post insulators, and conductive components. The two insulators are mounted on bearing housings at both ends of the base and are connected by a crossover connecting rod for horizontal rotation. The conductive blade is made of copper tubes, with contacts located at the midpoint between the two insulators. The operating mechanism drives rotation of one insulator, which drives the other through a linkage system, achieving a horizontal center break.
The product is unipolar; three separate poles are linked by a connecting rod with left-hand and right-hand threads for easy phase synchronization adjustment. Single-phase operation is also supported.
The RDS disconnector can be equipped with an earthing switch on one or both sides, with manual or motor operating mechanisms for three-pole linkage operation.
| Item | Unit | Value |
|---|---|---|
| Rated voltage (Um) | kV | 40.5 |
| Rated frequency | Hz | 50 / 60 |
| Rated current | A | 630, 1250, 1600, 2000, 2500, 3150 |
| Rated short-time withstand current (rms) | kA | 25 / 31.5 / 40 |
| Rated short-circuit withstand duration | s | 3 |
| Rated peak withstand current | kA peak | 63 / 80 / 100 |
| Rated power-frequency withstand voltage (1 min), phase to earth | kV | 95 |
| Rated power-frequency withstand voltage (1 min), across isolating distance | kV | 95 + 23 |
| Rated lightning impulse withstand voltage, phase to earth | kV peak | 200 |
| Rated lightning impulse withstand voltage, across isolating distance | kV peak | 200 + 35 |
| Mechanical endurance | operations | 5,000 |
| Terminal static load (longitudinal / transverse / vertical) | N | 500 / 250 / 500 |
| Minimum insulation distance to ground | mm | 400 |
| Operating altitude | m | ≤ 2,000 |
| Pollution level per IEC 60815 | class | IV (very heavy) |
| Item | Manual | Motor |
|---|---|---|
| Mechanism type | Manual operating mechanism | Motor operating mechanism |
| Control voltage | — | AC 220 V, AC 380 V / DC 110 V, DC 220 V |
| Motor voltage | — | AC 220 V, AC 380 V / DC 220 V |
| Opening / closing time | — | 6 s ± 1 s |
When ordering, the following parameters must be specified:
Yes. It adopts self-lubricating bearings and full stainless steel & anti-corrosion components. No lubrication or regular maintenance is required during long-term outdoor operation. The tubular copper contact blade ensures high conductivity and long service life.
Multiple flexible options are available:
It is designed for IEC Class IV very heavy pollution areas, supports installation altitude up to 2000m, and adapts to outdoor substation, coastal, industrial and dusty heavy-pollution environments with stable insulation performance.
Yes. Rockwill provides factory direct sales and full OEM/ODM customization for RDS series high voltage disconnectors, supporting project-specific parameter and configuration adjustment for global clients and local partners.
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