Voltage Regulation/Tapping Mechanism
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This page explains how Diverter Switch (for OLTC) is classified within Electrical Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
A switching device within an On-Load Tap Changer (OLTC) that redirects current flow between transformer winding taps to adjust voltage without interrupting power.
Technical details and manufacturing context for Diverter Switch (for OLTC)
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Rated Voltage | 10–35 kV | Must match transformer insulation levelIEC 60214-1 |
| Rated Current | 300–1200 A | Continuous current capacityIEC 60214-1 |
| Number of Steps | 8–35 | Depends on voltage regulation range |
| Switching Time | 0.5–2.0 s | Faster reduces arcing but increases mechanical stress |
| Mechanical Life | 500000–1000000 operations | Number of switching operations before overhaulIEC 60214-1 |
| Electrical Life | 200000–500000 operations | Under rated load and voltageIEC 60214-1 |
| Contact Resistance | ≤50 µΩ | Higher resistance causes overheatingIEC 60214-1 |
| Insulation Level | LI 75–170 kV | Lightning impulse withstand voltageIEC 60076-3 |
| Operating Temperature | -40–85 °C | Outside range may affect oil viscosity and contact wear |
| Degree of Protection | IP54–IP65 | Higher IP for outdoor or harsh environmentsIEC 60529 |
| Material of Contacts | CuW70–CuW80 | Tungsten-copper for arc resistanceASTM B702 |
| Weight | 50–200 kg | Depends on rating and number of phases |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is essential for the following industrial systems and equipment:
| pressure: | Atmospheric to 2 bar (sealed enclosure) |
| other spec: | Rated current: 100A to 3000A, Switching frequency: Up to 500,000 operations, Dielectric strength: 50kV impulse withstand |
| temperature: | -40°C to +125°C (ambient), contact temperature up to 150°C during switching |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
Manufacturer profiles associated with Diverter Switch (for OLTC).
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A practical evidence checklist for RFQ preparation and supplier evaluation.
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The diverter switch transfers the load current from one transformer winding tap to another without interrupting power, enabling voltage regulation while the transformer is energized.
Typical rated voltage is 10–35 kV, and rated current is 300–1200 A, but these must be confirmed for the specific model and application.
It uses transition resistors or reactors to limit circulating currents and arcing, and the arc is quenched in dielectric oil or vacuum, depending on the design.
IEC 60214-1 covers performance and testing, and IEC 60076-3 covers insulation levels. Compliance must be verified with the supplier.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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