Catalog LV1 T 2009 Chapter 3 EN
Catalog LV1 T 2009 Chapter 3 EN
Catalog LV1 T 2009 Chapter 3 EN
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3RT, 3RH, 3TB, 3TC, 3TH, 3TK Contactors for Special Applications<br />
Contactors Type 3TC44 ... 3TC78<br />
Endurance of the main contacts<br />
Operating cycles at 500 V<br />
7<br />
10<br />
8<br />
6<br />
4<br />
2<br />
6<br />
10<br />
8<br />
6<br />
4<br />
2<br />
5<br />
10<br />
8<br />
6<br />
4<br />
2<br />
4<br />
10<br />
8<br />
6<br />
4<br />
2<br />
Diagram legend:<br />
I a = Breaking current<br />
3TC44 3TC48 3TC52 3TC56<br />
For the rated data of the auxiliary contacts see page 3/126.<br />
1) See the endurance diagram above.<br />
2) For 3TC44, one NC contact each must be connected in series for the right<br />
and left auxiliary switch block respectively.<br />
3TC Contactors for Switching DC Voltage<br />
NSB0_00655<br />
3<br />
10<br />
10 20 40 100 200 400 600 1000 2000 1 a (A) 4000<br />
3TC44 to 3TC56 contactors<br />
Operating cycles at 500 V<br />
20<br />
18<br />
16<br />
14<br />
12<br />
10<br />
8<br />
6<br />
4<br />
2<br />
1- and 2-pole, 32 ... 400 A<br />
Siemens LV 1 T · <strong>2009</strong><br />
NSB0_00656<br />
0,5<br />
50 100 150 200 250 300 1 a(A)<br />
400<br />
3TC74 and 3TC78 contactors<br />
Contactors Type 3TC44 3TC48 3TC52 3TC56<br />
General data<br />
Size 2 4 8 12<br />
Permissible mounting position<br />
The contactors are designed for operation on a vertical mounting surface.<br />
# # # # <br />
Mechanical endurance Operating cycles 10 million<br />
Electrical endurance Operating cycles<br />
1)<br />
Rated insulation voltage Ui (degree of pollution 3) V 800 1000<br />
Protective separation between the coil and the main contacts<br />
acc. to <strong>EN</strong> 60947-1, Appendix N<br />
V Up to 300 Up to 660<br />
Mirror contacts 2)<br />
A mirror contact is an auxiliary NC contact that cannot be closed simultaneously<br />
with a NO main contact.<br />
Yes, acc. to <strong>EN</strong> 60947-4-1, Appendix F<br />
Permissible ambient temperature During operation °C -25 ... +55<br />
During storage °C -50 ... +80<br />
Degree of protection acc. to <strong>EN</strong> 60947-1, Appendix C IP00/open, for AC operation, coil assembly IP40<br />
Shock resistance<br />
Short-circuit protection<br />
Rectangular pulse g/ms 7.5/5 and 3.4/10 10/5 and 5/10 12/5 and 5.5/10 12/5 and 5.6/10<br />
Main circuit<br />
Fuse links gL/gG<br />
LV HRC 3NA, DIAZED 5SB,<br />
NEOZED 5SE<br />
Auxiliary circuit<br />
(short-circuit current Ik ≥ 1 kA)<br />
Fuse links, gL/gG<br />
DIAZED 5SB, NEOZED 5SE<br />
© Siemens AG <strong>2009</strong><br />
Type of coordination "1" A 50 160 250 400<br />
Type of coordination "2" A 35 63 80 250<br />
A 16<br />
Miniature circuit breaker with C characteristic A 10<br />
5 * $ # ><br />
3/127<br />
3
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