FII-HI
15Pages

THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer Up to 800 A Built from the following components to be included in your order: SWITCHING UNIT FII-HI Tap Changer CORE sub-assembly. Diagram BRIDGE STAR Series-Parallel (S-P) Star-Delta Common Output per Phase STAR with Neutral point BRIDGE, 2-stage FIXED CONTACTS / COMMON CONTACTS CONTROL DEVICE , options & accessories – Pages 11 to 15

CHANGER FII-HI THREE-PHASE OFF-CIRCUIT TAP transformer For oil-filled BRIDGE – 20 / 30 kV – 400 to 800 A N = 3 to 6 positions – setting 2.5 % per position Angular Step : Code / Value Switching Unit Number

THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer STAR – 20 / 30 kV – 400 to 800 A N = 3 to 6 positions – setting 2.5 % per position Angular Step : Code / Value Switching Unit Number

THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer SERIES-PARALLEL – 20 / 30 kV – 400 to 800 A Customized insulating bracket : Y / a / b / d / Ø to be specified when ordering. AC / BIL Test Voltages between FC kV Angular Step : Code / Value Switching Unit Number

THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer STAR - DELTA – 20 / 30 kV – 400 to 800 A Angular Step : Code / Value Switching Unit Number

THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer COMMON OUTPUT PER PHASE– 20 / 30 kV – 400 to 800 A N = 3 to 6 positions – setting 2.5 % per position Angular Step : Code / Value Switching Unit Number

THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer STAR with NEUTRAL POINT – 20 / 30 kV – 400 to 800 A N = 3 to 6 positions – setting 2.5 % per position Angular Step : Code / Value Switching Unit Number

THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer BRIDGE – 2-stage – 20 / 30 kV – 400 to 800 A N = 3 to 6 positions – setting 2.5 % per position

FIXED CONTACTS FLAG-SHAPED ASP CODE : 02-26496 (DEFAULT CHOICE) H = 60 Unless otherwise specified by the Customer, flag type contacts faced as shown in the below diagram. The contacts situated near the operating device face downwards.

TAP CHANGERS OF THE TYPE COMMON OUTPUT PER PHASE AND STAR WITH OUTER-EARTHED CONDUCTOR COMMON CONTACTS FLAG-SHAPED (DEFAULT CHOICE) J and K to be specified in accordance with the TUBULAR FIXED CONTACTS specified. FOLDED FLAT

DIRECT DRIVE WHEEL CONTROL DEVICE Ref. 26374-B Transformer Tank Unlocking by padlockable pull-knob

NON-DIRECT DRIVE WHEEL CONTROL DEVICES 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

ASSEMBLY OF RACK AND PINION TAP CHANGERS Standard assembly : Tap changers and fixed contacts perpendicular to the operating axis. Assembly of vertical contacts with bevel gear. OPTION 1 (see page 14 for more details) : Parallel tap changer and fixed contacts perpendicular to the operating axis. Assembly of vertical tap changer with bevel gear. OPTION 2 (see page 14 for more details) : Perpendicular tap changer and fixed contacts parallel with the operating axis.

POSITIONS OF BEVEL GEAR - Positions defined while viewing the Tap Changer : facing Fixed Contacts connections, with Switching unit in horizontal position, with Control Device on the right. Type 2 Bottom Bevel gear at the bottom and opposite to the fixed contacts Type 1 Bottom Bevel gear at the bottom and on the fixed contacts side Type 3 Bottom Bevel gear at the bottom and opposite to the fixed bar Type 2 Top Bevel gear at the top and opposite to the fixed contacts Type 1 Top Bevel gear at the top and on the fixed contacts side Type 3 Top Bevel gear at the top and opposite to the fixed bar

CONTROL DEVICES - STANDARD ASSEMBLY (WITHOUT BEVEL GEAR) NUMBERING - REPEATER DISC Position from 1 to N counter clockwise (CCW) Position from 1 to N clockwise (CW)