Tmax XT UL Catalogo [EN]

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ACCESSOR I ES

— Safety and protection

Terminal covers Terminal covers are applied to the circuit-breaker to prevent accidental contact with live parts, thus provid- ing protection against direct contact. The terminal covers are pre-punched to facilitate the installation of busbars and/or cables, guaranteeing the correct insulation. The terminal covers are able to guarantee ade- quate circuit-breaker installation and correct insulation and are listed in the Chapter “Power Connection”. There are different types of terminal covers: • High terminal covers (HTC) • Low terminal covers (LTC) • Extended high terminal covers (HTC-ES), for front extended terminals • High terminal covers with back shield (HTC_BS), with a back plate in order to guarantee insulation with the rear zone of the switchboard The table below shows the terminal covers available for each frame:

— Terminal covers

XT1 XT7/XT7 M 3p 4p 3p 4p 3p 4p 3p 4p 3p 4p 3p 4p 3p 4p XT2 XT3 XT4 XT5 XT6

HTC - High terminal covers LTC - Low terminal covers

             

         (1)  (1)    

- - -

HTC-ES - Extended high terminal covers

     

HTC_BS - High terminal cover with back shield (2) - HTC-ES_BS - Extended high terminal covers with back shield (2) -

     

(1) LTC height for XT5 is equal to 0.98 in; (2) Not compatible with XT5 Fixed Part

Phase separators Phase separators increase the insulation characteristics between phases at the connection level. They are mounted from the front, even when the circuit-breaker has already been installed, by inserting them into the corresponding slots. The phase separators guarantee adequate circuit-breaker installation and correct

insulation and are listed in the Chapter “Power connection”. The following versions of phase separators are available: • Low phase separators • Medium phase separators • High phase separators • Rear phase separators for fixed part only

— Phase separators

XT1

XT2 0.98 3.94 7.87 3.54

XT3 0.98 3.94 7.87 3.54

XT4 0.98 3.94 7.87 3.54

XT5 0.98 3.94 7.87 3.54

XT6

XT7/XT7 M

[in] 0.98 [in] 3.94 [in] 7.87 [in] 3.54

Phase separator - low

3.94 7.87

Phase separator - medium Phase separator - high Rear phase separator for FP

Sealable screws for terminal covers The lead sealing kit consists of screws which prevent the removal of the terminal covers, providing protec- tion against direct contacts and tampering. The screws can be locked with wire and lead seals. Each seal- ing kit consists of two screws. The maximum number of sealable screws that can be used for each cir- cuit-breaker is given in the table below.

XT1 XT6 3p 4p 3p 4p 3p 4p 3p 4p 3p 4p 3p 4p XT2 XT3 XT4 XT5 [No.] 1 1 1 1 1 2 1 1 1 1 1 1

— Sealable screws

Max number sealable screws for each terminal cover