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HZ
HZ
- Switching Units: Configurations include Bridge, Series-Parallel, Star-Delta, and Common Output per Phase, supporting nominal voltages of 20/30 kV and rated currents of 30/63 A or 150 A. Units have 2 to 7 positions with a 2.5% setting per position.
- Control Devices: Universal aluminium knob and handle control devices with a shaft diameter of Ø14, customizable length, and padlockable, except for 7-position 150A configurations.
- Mounting Instructions: Detailed steps for mounting control devices using specific tools and components like O-rings, washers, and screws.
- Fixed Contacts: Instructions for removal and mounting of 150 A fixed contacts using a special tool (56265-HZ-HM).
- Brackets for switching units must be ordered separately and can be metal (to be earthed) or insulating.
- Control devices and protective covers must be ordered separately.
- Voltage classes: 20 kV (AC: 50, BIL: 125) and 30 kV (AC: 70, BIL: 170).
- Angular steps for switching units with specific dimensions for each configuration and position.
- Ensure correct ordering of brackets and control device components.
- Follow precise mounting instructions for proper installation and operation.
- Universal Knob 26175-UNI and Handle 26798-UNI made of aluminium alloy.
- Screws SH CC M8-25 and H M05-10, Nut HB M08, and Washers Z M05 made of stainless steel.
- Repeater Disc 26829-UNI-HZ and optional Red Plate 26829-UNI-HZ-RED made of stainless steel.
- O-rings R11 made of Viton/FPM.
- Stuffing Box 26238-UNI made of steel.
- Baseplate 56162-Z-UNI and Spacer 56125-UNI made of aluminium.
- Flat Gasket 56161 made of neoprene.
- Weld the Stuffing Box 26238-UNI onto the Transformer Tank.
- Fit components in order: 2 x R11 O-Rings, Baseplate 56162-Z-UNI, Spacer 56125-UNI, Repeater Disc 26829-UNI-HZ (or optional Red Plate and Repeater Disc), 2 Washers Z M05, 2 Screws H M05-10, and Universal Knob 26175-UNI.
- Insert and tighten the Screw SH CC M8-25 inside the knob, then remove it.
- Remove the Universal Knob 26175-UNI.
- Pre-drill the shaft approximately 3 mm deep at the marked place by the screw.
- Reinsert the Universal Knob 26175-UNI and tighten the Screw SH CC M8-25 inside the pre-drilling of the shaft.
- Insert and tighten the Nut HB M08.
- Insert the Gasket 56161 and the Cover 56160.
- Repeater Disc 26829-UNI-HZ-0.5 and Red Plate 26829-UNI-HZ-RED.
- Red Arrow for additional indication.
- Ensure the indicator of the knob is in front of the reference position during assembly.
- Two orientations are possible for the Repeater Disc.
Catalog excerpts
THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer Up to 150A Built from the following components to be included in your order: SWITCHING UNIT HZ Tap Changer CORE sub-assembly with TUBULAR Fixed Contacts for cable crimping or brazing. Diagram Nominal Voltage Rated current BRIDGE BRIDGE Series-Parallel (S-P) Series-Parallel (S-P) Star-Delta Common Output per Phase OPTIONAL (*) Insulating Insulating Metal Insulating Metal (*) Bracket(s) to be ordered SEPARATELY - Metal (to be earthed) or Insulating (“hook”) BRIDGE BRIDGE BRIDGE Series-Parallel (S-P) Star-Delta Common Output per Phase DOUBLE-CONTROL, 3-stage : one S-P + two BRIDGE DOUBLE-CONTROL, 3-stage : one S-P + two BRIDGE Insulating Metal Insulating Metal Insulating Metal 150 A Fixed Contacts are REMOVABLE – Removal/mounting instructions : pages 16/17 CONTROL DEVICE – with SHAFT , options & accessories – Pages 18 to 25 Mounting instructions of the control devices – Pages 26 to 28 1 28 septe
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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer BRIDGE – 20 / 30 kV – 30 and 63 A N = 2 to 7 positions – setting 2.5 % per position e CAUTION ! Optional bracket(s) : Insulating ("hook") Angular Step Switching Unit No. nn = 30 or 63 (A) rated current
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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer BRIDGE – 20 / 30 kV – 30 and 63 A N = 2 to 7 positions – setting 2.5 % per position Coupling sleeve Angular Step Switching Unit No. nn = 30 or 63 (A) rated current
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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer SERIES-PARALLEL – 20 / 30 kV – 30 and 63 A Coupling sleeve Angular Step Switching Unit No. nn = 30 or 63 (A) rated current
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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer SERIES-PARALLEL – 20 / 30 kV – 30 and 63 A Coupling sleeve Angular Step Switching Unit No. nn = 30 or 63 (A) rated current
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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer STAR - DELTA – 20 kV – 30 or 63 A Coupling sleeve
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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer COMMON OUTPUT PER PHASE – 20 / 30 kV – 30 or 63 A N = 3 / 5 / 7 positions – setting 2.5 % per position Angular Step Switching Unit No. nn = 30 or 63 (A) rated current
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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer BRIDGE – 20 / 30 kV – 150 A N = 2 to 7 positions – setting 2.5 % per position Coupling sleeve REMOVABLE CONTACTS Angular Step
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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer BRIDGE – 20 / 30 kV – 150 A N = 2 to 7 positions – setting 2.5 % per position e Coupling sleeve REMOVABLE CONTACTS Angular Step
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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer BRIDGE – 20 / 30 kV – 150 A N = 2 to 7 positions – setting 2.5 % per position Coupling sleeve REMOVABLE CONTACTS Angular Step
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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer SERIES-PARALLEL – 20 kV – 150 A Coupling sleeve REMOVABLE CONTACTS Angular Step
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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer STAR-DELTA – 20 kV – 150 A Coupling sleeve REMOVABLE CONTACTS Angular Step
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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer COMMON OUTPUT PER PHASE – 20 kV – 150 A N = 3 / 5 / 7 positions – setting 2.5 % per position e Coupling sleeve REMOVABLE CONTACTS Angular Step
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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer DOUBLE-CONTROL – 3-stage – 20 / 30 kV – 30 or 63 A 1 SERIES / PARALLEL + 2 BRIDGE N = 2 to 7 positions – setting 2.5 % per position W : to be specified Coupling sleeve
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THREE-PHASE OFF-CIRCUIT TAP CHANGER For oil-filled transformer DOUBLE-CONTROL – 3-stage – 20 / 30 kV – 150 A 1 SERIES / PARALLEL + 2 BRIDGE N = 2 to 7 positions – setting 2.5 % per position Coupling sleeve Coupling sleeve
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FIXED CONTACTS 150 A REMOVAL USING 56265-HZ-HM SPECIAL TOOL (To be ordered separately)
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FIXED CONTACTS 150 A MOUNTING USING 56265-HZ-HM SPECIAL TOOL (To be ordered separately)
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UNIVERSAL ALUMINIUM KNOB CONTROL DEVICE SHAFT Ø14 WITH CUSTOMIZED LENGTH (Does NOT fit 7-position 150A) BOTH COMPONENTS TO BE ORDERED SEPARATELY Mounting instructions page 26 Transformer tank
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UNIVERSAL ALUMINIUM KNOB CONTROL DEVICE, PROTECTIVE COVER SHAFT Ø14 WITH CUSTOMIZED LENGTH (Does NOT fit 7-position 150A) BOTH COMPONENTS TO BE ORDERED SEPARATELY Mounting instructions page 27 O 98 O 80 Transformer tank
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UNIVERSAL ALUMINIUM HANDLE CONTROL DEVICE SHAFT Ø14 WITH CUSTOMIZED LENGTH (Does NOT fit 7-position 150A) BOTH COMPONENTS TO BE ORDERED SEPARATELY Mounting instructions page 28 Transformer tank
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UNIVERSAL ALUMINIUM KNOB OR HANDLE CONTROL DEVICE NUMBERING - REPEATER DISC Position from 1 to N counter clockwise (CCW) Numbering code : Ba Position from 1 to N clockwise (CW)
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OPTIONAL ALUMINIUM PROTECTIVE COVER REF. 26794 FOR CONTROL DEVICE 27432-B-UNI TO BE ORDERED SEPARATELY
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ALUMINIUM KNOB CONTROL DEVICE FOR 7 POSITIONS 150 A TAP CHANGERS SHAFT Ø14 WITH CUSTOMIZED LENGTH BOTH COMPONENTS TO BE ORDERED SEPARATELY Transformer tank
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ALUMINIUM KNOB CONTROL DEVICE AND PROTECTICE COVER FOR 7 POSITIONS 150 A TAP CHANGERS SHAFT Ø14 WITH CUSTOMIZED LENGTH BOTH COMPONENTS TO BE ORDERED SEPARATELY
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ALUMINIUM HANDLE CONTROL DEVICE FOR 7 POSITIONS 150 A TAP CHANGERS SHAFT Ø14 WITH CUSTOMIZED LENGTH BOTH COMPONENTS TO BE ORDERED SEPARATELY Transformer tank
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UNIVERSAL ALUMINIUM KNOB CONTROL DEVICE 26328-UNI MOUNTING INSTRUCTIONS Optional : Red arrow Universal knob 26175-UNI aluminium alloy Screw SH CC M8-25 stainless steel Screw H M05-10 (x2) stainless steel Optional : Repeater disc 26829-UNI-HZ-0.5 + Red plate 26829-UNI-HZ-RED Washer Z M05 (x2) stainless steel Repeater disc 26829-UNI-HZ stainless steel O'rings R11 (x2) Viton / FPM Stuffing box 26238-UNI steel Transformer tank Shaft Ø14 stainless steel Fit the following order : - the 2 x R11 O-Rings - the repeater disc 26829-UNI-HZ (2 orientations are possible) or optional red plate 26829-UNI-HZ-RED...
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