Page 189 - SACE Tmax XT - Catalogue

ACCESSORIES 7/43

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Safety and protection

Terminal covers
Terminal covers are applied to the circuit-breaker to prevent accidental contact with live parts, thus
providing protection against direct contact. The terminal covers are pre-punched to facilitate the in-
stallation of busbars and/or cables, guaranteeing the correct insulation. The terminal covers are able to
guarantee adequate circuit-breaker installation and correct insulation and are listed in the Chapter
“Power Connection”.
There are different types of terminal covers:
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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:
XT1 XT2 XT3 XT4 XT5 XT6 XT7/XT7 M
3p 4p 3p 4p 3p 4p 3p 4p 3p 4p 3p 4p 3p 4p
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 25 mm
(2) Not compatible with XT5 Fixed Part
Phase separators
Phase separators increase the insulation characteristics between phases at the connection level. They 07
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
Phase separators
• High phase separators
• Rear phase separators for fixed part only

XT1 XT2 XT3 XT4 XT5 XT6 XT7/XT7 M
Phase separator - low [mm] 25 25 25 25 25 - -
Phase separator - medium [mm] 100 100 100 100 100 100 100
Phase separator - high [mm] 200 200 200 200 200 200 200
Rear phase separator for FP [mm] 90 90 90 90 90 - -

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

XT1 XT2 XT3 XT4 XT5 XT6
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Sealable screws 3p 4p 3p 4p 3p 4p 3p 4p 3p 4p 3p 4p
Max number sealable screws for each terminal cover [No.] 1 1 1 1 1 2 1 1 1 1 1 1