High-Voltage Transformer / Generator
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This page explains how Voltage Regulation/Tapping Mechanism 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 mechanical or electromechanical device within a high-voltage transformer or generator that adjusts the output voltage by changing the number of active turns in the winding.
Technical details and manufacturing context for Voltage Regulation/Tapping Mechanism
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Rated Voltage | 110–1000 kV | System voltage class of the transformerIEC 60076-1 |
| Rated Current | 100–4000 A | Continuous current capacityIEC 60076-1 |
| Number of Taps | 5–35 | Total tap positions including principal tap |
| Voltage Step per Tap | 0.5–5 % | Percentage of rated voltage per step |
| Switching Time | 2–10 s | Time for one tap change operation |
| Mechanical Endurance | 500000–1000000 operations | Number of tap changes without maintenanceIEC 60214-1 |
| Electrical Endurance | 200000–500000 operations | Number of operations under loadIEC 60214-1 |
| Contact Resistance | ≤50 µΩ | Maximum resistance per contact pairIEC 60214-1 |
| Operating Temperature | -40–85 °C | Ambient temperature range for operationIEC 60214-1 |
| Degree of Protection | IP54–IP65 | Protection against dust and waterIEC 60529 |
| Insulation Level | LI 550–LI 1950 kVp | Lightning impulse withstand voltageIEC 60076-3 |
| Weight | 500–5000 kg | Depends on voltage and current rating |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
Commonly used trade names and technical identifiers for Voltage Regulation/Tapping Mechanism.
This component is essential for the following industrial systems and equipment:
| pressure: | Atmospheric to 2 bar (sealed systems), dielectric fluid pressure as per transformer design |
| other spec: | Voltage range: 10kV to 500kV, tap steps: ±10% to ±20% in 0.625% to 2.5% increments, mechanical life: 500,000 operations minimum |
| temperature: | -40°C to +150°C (ambient), winding hot spot up to 180°C |
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 Voltage Regulation/Tapping Mechanism.
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A practical evidence checklist for RFQ preparation and supplier evaluation.
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On-load tap changers (OLTC) can switch taps while the transformer is energized and under load, using a diverter switch to maintain continuity. Off-circuit tap changers require the transformer to be de-energized before adjustment, as they are not designed to interrupt load current. The choice depends on whether continuous voltage regulation is needed.
Typical parameters include rated voltage (110–1000 kV), rated current (100–4000 A), number of taps (5–35), voltage step per tap (0.5–5%), switching time (2–10 s), mechanical endurance (500,000–1,000,000 operations), electrical endurance (200,000–500,000 operations), contact resistance (≤50 µΩ), operating temperature (-40 to 85 °C), degree of protection (IP54–IP65), insulation level (LI 550–LI 1950 kVp), and weight (500–5000 kg). These are reference ranges; actual values must be confirmed for the specific model.
Relevant standards include IEC 60076-1 for power transformer ratings, IEC 60214-1 for tap changer endurance and performance, IEC 60076-3 for insulation levels, and IEC 60529 for degrees of protection. These standards serve as procurement references; compliance must be verified with the manufacturer or supplier.
Maintenance typically includes periodic inspection of contacts, checking contact resistance, verifying switching time, and ensuring the insulating medium (oil or gas) is in good condition. The mechanical and electrical endurance ratings indicate the expected number of operations before maintenance is needed. Always follow the manufacturer's maintenance schedule and guidelines.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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