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Product catalog summary

Overview: This document provides technical specifications and examples of realizations for various types of three-phase off-circuit tap changers used in oil-filled transformers. It includes details on usual tap changers, fixed contacts, control devices, and examples of implementations.

Usual Tap Changers: The document outlines several configurations of tap changers, including Bridge, Series-Parallel, Star-Delta, Common Output per Phase, and Star with Neutral Point. All configurations are designed for 20/30 kV nominal voltage and rated for 800 to 1,250 A with a single stage, extendable up to 3,750 A with multiple stages. The number of positions ranges from 2 to 5, with a setting of 2.5% per position.

Specifications: Detailed specifications are provided for each configuration, including dimensions and switching unit numbers for different voltage classes (20 kV and 30 kV). The document includes diagrams and measurements for each type of tap changer.

Fixed Contacts: The document specifies fixed contacts available with silver-plating or tin-plating options. Two types of fixed contacts are mentioned: 80402 (max 1,000 A) and 02-80409 (max 1,250 A).

Control Devices: Control devices are detailed with references to standard and special low-profile models. Features include a coupling disk, zinc-plated flange, and optional stainless steel. Additional options include position signaling micro-switches, mechanical locks with safety micro-switches, and oxidation plus painting for outdoor aluminum parts.

Examples of Realizations: The document provides examples of implementations, such as common output per phase with 3 phases and 5 positions, bridge configurations with remote control, and star-delta configurations with remote control. Each example highlights specific features like insulating material supports and bevel gears.

Catalog excerpts

THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer 800 to 1 250 A with 1 stage – Up to 3 750 A with multi-stages USUAL TAP CHANGERS - Rack and pinion operated - Pages 3 to 7 Nominal Voltage Rated Current (1 Stage) Bridge Series-Parallel (S-P) Star-Delta Common Output per Phase Star with Neutral Point On request: - Voltage classes 45 kV and 60 kV - Rated current up to 3 750 A with multi-stages - Number of positions over 5 Website : http://www.appareils-precision.fr 12 mars 2021

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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer 800 to 1 250 A with 1 stage – Up to 3 750 A with multi-stages FIXED CONTACTS - Page 8 CONTROL DEVICES - Pages 9 and 10 EXAMPLES OF REALISATIONS - Pages 11 to 14 Website : http://www.appareils-precision.fr 12 mars 2021

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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer BRIDGE – 20 / 30 kV – 800 to 1 250 A with 1 stage Up to 3 750 A with multi-stages N = 3 to 5 positions – setting 2.5 % per position Switching Unit Number Website : http://www.appareils-precision.fr 12 mars 2

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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer SERIES-PARALLEL – 20 / 30 kV – 800 to 1 250 A with 1 stage Up to 3 750 A with multi-stages Website : http://www.appareils-precision.fr 12 mars 202

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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer STAR-DELTA – 20 / 30 kV – 800 to 1 250 A Up to 3 750 A with multi-stages Website : http://www.appareils-precision.fr 12 mars 202

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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer COMMON OUTPUT PER PHASE– 20 / 30 kV – 800 to 1 250 A Up to 3 750 A with multi-stages N = 2 to 5 positions – setting 2.5 % per position Switching Unit Number Website : http://www.appareils-precision.fr 12 mars 2

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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer STAR with NEUTRAL POINT – 20 / 30 kV – 800 to 1 250 A Up to 3 750 A with multi-stages N = 2 to 5 positions – setting 2.5 % per position Switching Unit Number Website : http://www.appareils-precision.fr 12 mars 2

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FIXED CONTACTS SILVER-PLATING OR TIN-PLATING ON REQUEST Website : http://www.appareils-precision.fr 12 mars 2021

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8 Coupling disk - Metal : Ø100 - Insulating : Ø120 Transformer Tank Unlocking by padlockable pull-knob Zinc plated Ø190 flange Option : Stainless steel 6 holes Ø14 on Ø160 Website : http://www.appareils-precision.fr 12 mars 2

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Coupling disk - Metal : Ø100 - Insulating : Ø120 To be specified 6 holes Ø 14 to 60° on Ø 200 On request: - Positions signaling micro-switches (if applicable) - Mechanical lock with safety micro-switches - Oxidation + painting of the outdoor aluminium parts 10 Email : [email protected] Website : http://www.appareils-precision.fr 12 mars

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Common Output per Phase – 3 phases – 5 positions 2 insulating material supports Bridge – 1 phase – 5 positions Bevel Gear – Tap changer parallel to the operating axis

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Star-Delta – 3 phases Remote-Control with 2 boxes Website : http://www.appareils-precision.fr 12 mars 2021

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Bridge – 3 phases – 5 Positions Remote-Control with 3 boxes, including an intermediary bevel gear Website : http://www.appareils-precision.fr 12 mars 202

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Control device 06 – 80811 Optional mechanical lock and safety micro-switches - Insulating material disc Website : http://www.appareils-precision.fr 12 mars 2021

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