Page 10 - SACE Tmax XT - Technical Catalogue

1/6 SACE TMAX XT LOW VOLTAGE MOLDED CASE CIRCUIT-BREAKERS

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Temperature performance

Circuit-breaker with magnetic only or electronic trip units and

switch-disconnectors
The electronic overcurrent trip units do not undergo any variations in performance as the temperature
varies. However, even though heating does not affect the trip thresholds of the electronic trip units, in
the case of temperatures exceeding +40°C it is advisable to reduce the maximum L (protection against
overloads) setting to protect the copper parts of the circuit-breaker against high temperatures.
The same considerations can be made for the switch-disconnectors and magnetic only circuit-breakers.
The table below shows the maximum value at which the threshold of I1 of the overcurrent protection (L)
must be set according to the ambient temperature and for the type of terminals used.

40°C 45°C 50°C 55°C 60°C 65°C 70°C
Imax [A] Imax [A] Imax [A] Imax [A] Imax [A] Imax [A] Imax [A]
XT1 F M-SD F-EF-ES-FCCu-R 160 160 153 140
P M-SD EF-HR/VR 125 117 108 100
XT2 F M-ELT F-FCCu 160 160 160 145
P/W M-ELT EF-HR/VR 160 160 160 148
XT3 F M-SD F-FCCu 250 250 228 204
P M-SD EF-HR/VR 250 222 196 170
XT4 F M-ELT-SD F-FCCu 250 250 238 213
P/W M-ELT-SD EF-HR/VR 250 231 211 190
XT5 400 F M-ELT-SD F 400 400 400 400 383 365 346
VR, ES, EF 400 400 400 400 400 381 362
FC CuAl 400 400 400 400 383 365 346
HR 400 400 400 400 383 365 346
P/W M-ELT-SD VR, ES, EF 400 385 370 355 338 321 302
FC CuAl 400 385 370 355 338 321 302
HR 400 385 370 355 338 321 302
XT5 630 F M-ELT-SD F 630 630 630 630 590 550 505
VR, ES, EF 630 630 630 630 601 570 537
FC CuAl 630 630 630 630 601 570 537
HR 630 630 630 630 590 550 505
P/W M-ELT-SD VR, ES, EF 600 578 555 532 507 481 454
FC CuAl 600 578 555 532 507 481 454
HR 600 565 530 507 484 457 430
XT6 800 F ELT-SD F-ES-EF-FC CuAl 800 800 800 780 760 740 720
VR 800 800 800 800 800 780 760
HR 800 800 800 760 720 680 640
W ELT-SD ES-EF-FC CuAl 800 780 760 740 720 680 640
VR 800 800 800 780 760 740 720
HR 800 780 760 740 720 680 640
XT6 1000 1) F ELT-SD F-EF-FC CuAl 1000 980 960 918.5 877 830.5 784
ES 1000 950 900 860 820 770 720
VR 1000 1000 1000 956.5 913 865 817
HR 1000 963 926 885.5 845 800.5 756
(1) XT6 1000 is supplied by default with EF connection terminals