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Summary of Contents for ABB Tmax XT XT3
- Page 1 — INSTRUCTION HANDBOOK 1SDH002294A1001 - ECN000285442 Tmax XT XT3 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 XT3 moulded case circuit breaker. Document is focused on Tmax XT XT3 3p IEC version, anyway it allows to cover other versions of Tmax XT XT3 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 Trip unit cover Mounted in the lower part of the circuit breaker Trimmer Mounted on the circuit breaker cover... - Page 5 Disassembly instruction tmaX Xt Xt3 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 2 and push it up in order to remove the 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 Manually remove the frontal together with the the 2 screws fixing the frontal to the circuit 2 fixing screws. breaker main structure.
- Page 7 Disassembly instruction tmaX Xt Xt3 6.3 PHASE 3 – TOGGLE Tools Actions to be performed Pliers As preliminary action close the circuit breaker and Slightly push the toggle towards the bottom part push the trip test button. of the circuit breaker.
- Page 8 INSTRUCTION HANDBOOK 6.4 PHASE 4 – OPERATING MECHANISM, TRIPPING SHAFT AND TRIP UNIT COVER Tools Actions to be performed Flat screwdriver As preliminary action by means of the flat By means of the cross screwdriver unscrew the Cross screwdriver screwdriver push up the 2 pins located in 2 screws fixing the trip unit cover to the circuit correspondence of the operating mechanism breaker main structure and remove the trip unit...
- Page 9 Disassembly instruction tmaX Xt Xt3 Manually remove the tripping shaft from the Manually remove the trip test button located on operating mechanism. the trip unit cover and the spring behind it. Disassembled parts • 2 pins (Metal) • 2 + 4 screws (Metal) • 1 trip unit cover with trimmer (Plastic) SEPARATE TREATMENT (Thermoplastics containing brominated flame retardants) • 1 operating mechanism (Plastic and Metal) SEPARATE...
- Page 10 INSTRUCTION HANDBOOK 6.5 PHASE 5 – REMOVAL OF THE CIRCUIT BREAKER COVER Tools Actions to be performed Cross screwdriver By means of the cross screwdriver unscrew the By means of the cutter start removing the label 4 screws located in the upper part of the circuit located on the left side of the circuit breaker and breaker fixing the circuit breaker cover to the manually complete the operation...
- Page 11 Disassembly instruction tmaX Xt Xt3 6.6 PHASE 6 – ARCHING CHAMBERS Tools Actions to be performed Flat screwdriver By means of the flat screwdriver push up and By gravity let the metal plates mounted inside the remove from the main circuit breaker structure plastic case come out from the plastic case.
- Page 12 INSTRUCTION HANDBOOK 6.7 PHASE 7 – MAIN CONTACTS ASSEMBLY Tools Actions to be performed Flat screwdriver By means of the flat screwdriver push up the Manually lift the bottom connection terminals and bottom connection terminals. after remove the main contacts assembly. Disassembled parts • 1 main contacts assembly (Plastic and Metal)
- Page 13 Disassembly instruction tmaX Xt Xt3 6.8 PHASE 8 – UPPER CONNECTION TERMINALS Tools Actions to be performed Cross screwdriver By means of the cross screwdriver unscrew the 2 By means of the cross screwdriver unscrew the 3 screws fixing the rear cover to the circuit breaker screws fixing the upper connection terminals.
- Page 14 INSTRUCTION HANDBOOK 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 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.