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Summary of Contents for ABB Tmax XT XT1
- Page 1 — INSTRUCTION HANDBOOK 1SDH002291A1001 - ECN000285442 Tmax XT XT1 Disassembly instructions...
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Page 3: Safety Notes
Scope of this document is to illustrate the step-by-step disassembly process of ABB SACE Tmax XT XT1 moulded case circuit breaker. Document is focused on Tmax XT XT1 3p IEC version, anyway it allows to cover other versions of Tmax XT XT1 circuit breaker 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 Plug in the left hole In the left hole of the circuit breaker Sides of the operating mechanism Parts constituting the operating mechanism... - Page 5 Disassembly instruction tmaX Xt Xt1 6.1 PHASE 1 – CAP KITS Tools Actions to be performed Allen key Insert the flat screwdriver as shown in the By means of the allen key remove the screws picture and push it up in order to remove the and the related washers connected with the cap kits.
- Page 6 INSTRUCTION HANDBOOK 6.2 PHASE 2 – FRONTAL Tools Actions to be performed Cross screwdriver By means of the cross screwdriver unscrew the Remove the frontal together with the 2 fixing 2 screws fixing the frontal to the circuit breaker screws. main structure. Disassembled parts • 1 frontal (Plastic) • 2 screws (Metal)
- Page 7 Disassembly instruction tmaX Xt Xt1 6.3 PHASE 3 – PLUG IN THE LEFT HOLE * Tools Actions to be performed Cross screwdriver By means of the cross screwdriver unscrew the Manually remove the plug together with the fixing screw fixing the plug located in the left hole of the screw.
- Page 8 INSTRUCTION HANDBOOK 6.4 PHASE 4 – TOGGLE Tools Actions to be performed Pliers Push the trip test button. Slightly push the toggle towards the bottom part of the circuit breaker. By means of the pliers take the upper part of the toggle and remove it.
- Page 9 Disassembly instruction tmaX Xt Xt1 6.5 PHASE 5 – OPERATING MECHANISM Tools Actions to be performed Flat screwdriver By means of the flat screwdriver unhook the 2 By means of the cross screwdriver unscrew the springs mounted on the operating mechanism.
- Page 10 INSTRUCTION HANDBOOK 6.6 PHASE 6 – CIRCUIT BREAKER COVER AND TRIPPING SHAFT Tools Actions to be performed Cross screwdriver By means of the cross screwdriver unscrew the 4 By means of the torx key unscrew the 2 screws screws located in correspondence of the removed located on the circuit breaker sides fixing the operating mechanism fixing the circuit breaker circuit breaker cover to the circuit breaker base.*...
- Page 11 Disassembly instruction tmaX Xt Xt1 Manually remove the trip test button and after By means of the flat screwdriver push out from remove the spring behind it. the circuit breaker cover the trimmer. By means of the flat screw driver remove the gasket from the trimmer.
- Page 12 INSTRUCTION HANDBOOK 6.7 PHASE 7 – ARCHING CHAMBERS Tools Actions to be performed – Manually remove arching chambers and their Manually separate the arching chambers from supports. their supports. Disassembled parts • 6 arching chambers (Plastic or GPO-3 and Metal) * • 6 arching chambers supports (Plastic and Metal) *Arching chambers sides of circuit breakers with B, C and N breaking capacities are made of GPO-3 while arching chambers sides of circuit breakers with S and H breaking capacities are made of plastic.
- Page 13 Disassembly instruction tmaX Xt Xt1 6.8 PHASE 8 – MAIN CONTACTS ASSEMBLY AND UPPER TERMINALS Tools Actions to be performed Pliers By means of the pliers remove the springs from Manually push the lower terminals of the circuit thermal/magnetic tripping groups. breaker as indicated by the arrow and remove the main contacts assembly.
- Page 14 INSTRUCTION HANDBOOK 6.9 PHASE 9 – CIRCUIT BREAKER BASE Tools Actions to be performed Flat screwdriver By means of the flat screwdriver remove the plug located in the back part of the circuit breaker base. Disassembled parts • 1 circuit breaker base (Plastic) • 1 plug (Rubber) 7.
- Page 16 — 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.
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