Catalog LV1 T 2009 Chapter 3 EN

3RT, 3RH, 3TB, 3TC, 3TH, 3TK Contactors for Special Applications
■ Overview
AC and DC operation (size S3)
UC operation (AC/DC) (sizes S6 to S12)
IEC 60947, EN 60947 (VDE 0660)
The contactors are suitable for use in any climate. They are
finger-safe according to EN 50274.
■ Technical specifications
Contactors Type 3RT14 46
General data
Size S3
Permissible mounting position
The contactors are designed for
operation on a vertical mounting
surface.
AC and DC operation
360°
Upright mounting position: AC operation
3RT14 Contactors for Switching Resistive Loads (AC-1)
DC operation
Special version required.
--
Mechanical endurance Operating
cycles
10 million
Electrical endurance in operating cycles
Utilization category AC-1 at I e
3-pole, 140 ... 690 A
3RT14 contactors are used for switching resistive loads (AC-1)
or as contactors, for example, for variable-speed operating
mechanisms that normally only have to carry the current.
The accessories for the 3RT10 contactors can also be used
here.
For more detailed descriptions about the sizes S6 to S12, see
"3RT10 Contactors, 3-pole, 3 ... 250 kW".
Operating
cycles
Rated insulation voltage U i (degree of pollution 3) V 1000
Rated impulse withstand voltage U imp kV 6
Protective separation between the coil and the main contacts
acc. to EN 60947-1, Appendix N
© Siemens AG 2009
V 690
For DC operation and 22.5 °C inclination towards the front,
operating range 0.85 ... 1.1 x U s
5 * " % % =
0.5 million
30° 30°
Mirror contacts
- Removable auxiliary switch block Yes, acc. to EN 60947-4-1, Appendix F
A mirror contact is an auxiliary NC - Permanently fitted auxiliary
Acc. to Swiss regulations (SUVA) on request
contact that cannot be closed simultaneously
with a NO main contact.
switch block
Permissible ambient temperature During operation °C -25 ... +60
During storage °C -55 ... +80
Degree of protection acc. to EN 60947-1, Appendix C IP20 (terminal compartment IP00),
AC coil assembly IP40,
DC coil assembly IP30
Touch protection acc. to EN 50274
Shock resistance
Finger-safe
Rectangular pulse AC and DC operation g/ms 6.8/5 and 4/10
Sine pulse AC and DC operation g/ms 10.6/5 and 6.2/10
Conductor cross-sections
1)
Short-circuit protection for contactors without overload relays
Main circuit
Fuse links, gL/gG operational class,
LV HRC, 3NA
Type of coordination "1": A 250
Fuse links, gR operational class,
SITOR 3NE
Auxiliary circuit
Type of coordination "2" A 250
Fuse links gL/gG (weld-free protection at Ik ≥1 kA)
DIAZED 5SB, NEOZED 5SE
A 10
Or miniature circuit breakers with C characteristic (Ik < 400 A)
1) For conductor cross-sections see page 3/96.
A 10
NSB0_00478b
Siemens LV 1 T · 2009
3/93
3