SACE TMAX XT UL/CSA LOW VOLTAGE MOLDED CASE C I RCUI T- BRE AKERS UL4 89 AND CSA C2 2 . 2 STANDARDS
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— Current Limiting
Existing UL circuit-breakers Tmax XT2, XT4 and XT5 have undergone specific tests as per the UL 489 Standard in order to be classified as UL current lim- iting circuit-breakers. They have specific characteristics in terms of limit- ing peak current and specific let-through energy.
According to the UL 489 Standard, current limiting circuit-breakers will be marked “Current Limiting” on the front and will have a label on the right side speci- fying the peak current and specific let-through en- ergy values. Accessories and trip units are the same as available for standard UL Tmax MCCBs.
Circuit-breaker
XT2
XT4
XT5
Trip Units
TMF, TMA, Ekip
TMF, TMA, Ekip
TMF, TMA, Ekip
Up to 250A (2)
Up to 600A
In
Up to 125A (1)
Breaking Capacity
H
L
V
H
L
V
H
L
V
(1) Includes TMF, TMA with In = 15-125A and Ekip with In= 10, 25, 60, 100, 125A (2) Includes TMF, TMA with In = 25-250A and Ekip with In= 40, 60, 100, 150, 225, 250A
— Circuit-breakers for single phase applications
Tmax XT three poles circuit-breakers, equipped with thermal-magnetic trip unit, can be used in single phase applications. For this purpose, they are
marked as follows according to UL standard: • Suitable for single phase application up to 347 Vac • Suitable for single phase application up to 600 Vac
XT1
XT2
XT3
XT4
XT5
XT6
XT7
Up to 347 Vac Up to 600 Vac
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