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ABB Sace TMAX XT XT4 THERMOMAGNETIC Disassembly Instructions Manual
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ABB Sace TMAX XT XT4 THERMOMAGNETIC Disassembly Instructions Manual

ABB Sace TMAX XT XT4 THERMOMAGNETIC Disassembly Instructions Manual

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INSTRUCTION HANDBOOK
1SDH002295A1001 - ECN000285442
TMAX XT XT4 THERMOMAGNETIC
Disassembly instructions

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Summary of Contents for ABB Sace TMAX XT XT4 THERMOMAGNETIC

  • Page 1 — INSTRUCTION HANDBOOK 1SDH002295A1001 - ECN000285442 TMAX XT XT4 THERMOMAGNETIC Disassembly instructions...

  • Page 3: Safety Notes

    Disassembly instruction tmaX Xt Xt4 tHermomaGnetic 1. SCOPE Scope of this document is to illustrate the step-by-step disassembly process of ABB SACE Tmax XT XT4 moulded case circuit breaker equipped with a thermomagnetic trip unit. Document is focused on Tmax XT XT4 3p IEC version, anyway it allows to cover other versions of Tmax XT XT4 circuit breaker equipped with a thermomagnetic trip unit with just few slight differences to be taken into account.

  • Page 4: Disassembly Process

    INSTRUCTION HANDBOOK 5. SEPARATE TREATMENT Table below lists parts requiring a separate treatment adding information about part location inside circuit breakers and related quantity. Description Position inside circuit breaker Quantity Cap kits In correspondence of circuit breaker connection terminals Cases for microswitches In the right hole of the circuit breaker Plug In the left hole of the circuit breaker...
  • Page 5 Disassembly instruction tmaX Xt Xt4 tHermomaGnetic 6.1 PHASE 1 – CAP KITS Tools Actions to be performed Allen key Insert the flat screwdriver as shown in Picture 2 By means of the allen key remove the screws and push it up in order to remove the cap kits. connected with the cap kits.
  • Page 6 INSTRUCTION HANDBOOK 6.2 PHASE 2 – BREAKING PART FRONTAL Actions to be performed Tools Cross screwdriver By means of the cross screwdriver unscrew By means of the cross screwdriver unscrew the 2 screws located in the upper part of the the 2 screws located in the lower part of the breaking part frontal fixing the breaking part breaking part frontal fixing the breaking part...
  • Page 7 Disassembly instruction tmaX Xt Xt4 tHermomaGnetic By means of the flat screwdriver push up the reset test rod and manually remove it. Disassembled parts • 2 + 2 screws (Metal) • 1 breaking part frontal (Plastic) • 1 reset test rod (Plastic)
  • Page 8 INSTRUCTION HANDBOOK 6.3 PHASE 3 – TOGGLE AND ITS PROTECTION Actions to be performed Tools – Manually lift the toggle and its protection and after separate the toggle from its protection. Disassembled parts • 1 toggle (Plastic) • 1 toggle protection (Plastic)
  • Page 9 Disassembly instruction tmaX Xt Xt4 tHermomaGnetic 6.4 PHASE 4 – TRIP UNIT Actions to be performed Tools Cross screwdriver By means of the cross screwdriver unscrew the Manually disasseble the transparent protection 2 screws fixing the trip unit frontal to the trip from the trip unit frontal.
  • Page 10 INSTRUCTION HANDBOOK 6.5 PHASE 5 – PLASTIC PARTS MOUNTED ON THE BREAKING PART Actions to be performed Tools Flat screwdriver Manually slightly push the 2 flaps present on By means of the flat screwdriver lift the plug each case for microswitch located in the right located in the left hole of the breaking part and hole of the breaking part as indicated by the after manually complete the removal of the...
  • Page 11 Disassembly instruction tmaX Xt Xt4 tHermomaGnetic 6.6 PHASE 6 – REAR COVER Actions to be performed Tools Cross screwdriver By means of the cross screwdriver unscrew the Manually remove the rear cover. 2 screws fixing the rear cover to the breaking part.
  • Page 12 INSTRUCTION HANDBOOK 6.7 PHASE 7 – OPERATING MECHANISM AND TRIPPING SHAFT Actions to be performed Tools Torx key By means of the torx key (size 20) unscrew By means of the flat screwdriver unhook the 2 the 4 screws located in the back part of the springs mounted on the operating mechanism.
  • Page 13 Disassembly instruction tmaX Xt Xt4 tHermomaGnetic Manually remove the tripping shaft from the By means of the flat screwdriver remove the operating mechanism pulling it as indicated by metal plate mounted on the tripping shaft. the arrow. By means of the flat screwdriver and by means of the pliers dismount the pin and remove the pin and the 2 springs mounted on the pin.
  • Page 14 INSTRUCTION HANDBOOK 6.8 PHASE 8 – BREAKING PART COVER AND CONNECTED PARTS Actions to be performed Tools Cross screwdriver By means of the cross screwdriver unscrew the By means of the cross screwdriver uncrew the 2 screws located at the bottom corners of the 6 screws fixing the breaking part cover to the breaking part cover*.
  • Page 15 Disassembly instruction tmaX Xt Xt4 tHermomaGnetic By means of the pliers remove the hood By means of the flat screwdriver slightly push mounted on the motor operator lever removed on the right the the trip lever mounted in the at previous step. bottom part of the breaking part and then lift the lever in order to complete the removal.
  • Page 16 INSTRUCTION HANDBOOK Manually separate the plastic part from the By means of the flat screwdriver remove the metals parts constituting the terminals metal plate from the plastic part constituting connections removed at previous step. terminals connections. By means of the pliers remove the open/close lever. Disassembled parts • 2 + 6 +3 screws (Metal) • 1 breaking part cover (Plastic) • 1 motor operator lever (Metal)
  • Page 17 Disassembly instruction tmaX Xt Xt4 tHermomaGnetic 6.9 PHASE 9 – MOVING CONTACTS AND ARCHING CHAMBERS Tools Actions to be performed Flat screwdriver Manually remove the block lever. Manually lift the moving contacts assembly. Pliers By means of the pliers remove the 2 plugs By means of the pliers remove the 2 plugs mounted on the moving contacts assembly*.
  • Page 18 INSTRUCTION HANDBOOK By means of the flat screw driver lift the Manually separate the arching chambers from arching chambers and after manually complete their supports. the removal operation. Disassembled parts • 1 block lever (Metal) • 1 moving contacts assembly (Plastic and Metal) • 4 plugs (Plastic) • 6 arching chambers (Plastic and Metal) • 6 arching chambers supports (Plastic and Metal) Note: Arching chambers of circuit breakers with N, S, H and L breaking capacities are made by an unique assembly and by means of a flat screwdriver plates can be removed from the arching...
  • Page 19 Disassembly instruction tmaX Xt Xt4 tHermomaGnetic 6.10 PHASE 10 – FIXED CONTACTS Tools Actions to be performed Cross screwdriver By means of the cross screw driver unscrew Manually push the fixed contacts as indicated the 6 screws located in the back part of the by the arrow.
  • Page 20 INSTRUCTION HANDBOOK By means of the flat screwdriver unscrew the By means of the flat screwdriver complete the screw fixing the case side protection to the removal of the case side protections. breaking part base. * Applicable to circuit breakers with V and X breaking capacities * Applicable to circuit breakers with V and X breaking capacities only.
  • Page 21 Disassembly instruction tmaX Xt Xt4 tHermomaGnetic 6.11 PHASE 11 – TRIP UNIT COVER AND I3 ASSEMBLY Tools Actions to be performed Cross screwdriver By means of the cross screwdriver unscrew the By means of the torx key unscrew the 5 screws 3 screws fixing the trip unit cover to the trip fixing the trip unit cover to the trip unit.
  • Page 22 INSTRUCTION HANDBOOK By means of the flat screwdriver lift the top cover of the trip unit and manually complete the removal. Disassembled parts • 3 + 5 + 3 screws (Metal) • 3 springs (Metal) • 3 I3 groups (Metal) • 3 I3 supports (Plastic) • 1 trip unit cover (Plastic and Metal)
  • Page 23 Disassembly instruction tmaX Xt Xt4 tHermomaGnetic 6.12 PHASE 12 – THERMAL/MAGNETIC GROUPS Tools Actions to be performed Cross screwdriver Manually remove the shell mounted over the By means of the flat screwdriver separate the thermal/magnetic groups. shells from the fixed core. Flat screwdriver By means of the cross screwdriver unscrew the Manually lift the thermal/magnetic groups.
  • Page 24 INSTRUCTION HANDBOOK 6.13 PHASE 13 – TRIP UNIT Actions to be performed Tools Flat screwdriver Manually lift the lever. Manually remove the spring. Pliers Torx key No. 8 Manually remove the pin mounted behind the Manually lift the spring guide rod and the lever and spring removed at previous steps.
  • Page 25 Disassembly instruction tmaX Xt Xt4 tHermomaGnetic By means of the pliers unhook the 3 springs By means of the pliers lift the moving located in the poles. armatures located in each pole and after manually complete the removal of the moving armatures.
  • Page 26 INSTRUCTION HANDBOOK By means of the pliers remove the 3 springs. By means of the pliers remove the test button mounted on the trip unit base. Disassembled parts • 1 lever (Plastic) • 1 + 1 + 3 + 1 springs (Metal) • 1 pin (Metal) • 1 spring guide rod (Plastic) • 2 supports (Plastic) • 2 screws (Metal) • 1 thermal shaft (Plastic) • 2 trimmers (Plastic) SEPARATE TREATMENT (Thermoplastics containing brominated flame...
  • Page 27 Disassembly instruction tmaX Xt Xt4 tHermomaGnetic 7. ENERGY CONSUMPTION FOR CIRCUIT BREAKERS DISASSEMBLY Since all disassembly operations illustrated in this document are manual, the CO equivalent emissions can be considered null/negligible.
  • Page 28 — ABB SACE A division of ABB S.p.A. L.V. Breakers Via Pescaria 5, 24123 Bergamo - Italy Phone: +39 035 395.111 Fax: +39 035 395.306-433 abb.it/lowvoltage © Copyright 2022 ABB. All rights reserved. Specifications subject to change without notice.