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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 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

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

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

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

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

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

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

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

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

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 : asp.commercial@appareils-precision.fr Website : http://www.appareils-precision.fr 12 mars

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

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

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

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