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3RT1/3RH1 contactors
SIRIUS System Manual
GWA 4NEB 430 0999-02b
3-123
2) Corresponds to section from IEC 60 947-4 (VDE 0660 Part 102):
Coordination type "1":
The destruction of the contactor and the overload relay is permissible. The contactor and/or overload relay must be replaced, if necessary.
Coordination type "2":
The overload relay must not be damaged. Contact welding on the contactor is permissible, if it can be easily
separated again from the contactor.
3RT14 contactors, 3-pole
Contactor
Frame size
Type
S3
3RT14 46
Short-circuit protection for contactors without overload relay
Main circuit
Fuse applications, performance class gL/gG
NH
Type 3NA
Coordination type "1"
2
)
A
250
Fuse-links, performance class gR
SITOR
Type 3NE
Coordination type "2"
2
)
A
250
Control circuit
Fuse-links, performance class gL/gG
DIAZED
Type 5SB
A
10
(unwelded fuse at
I
k
≥
1 kA)
NEOZED
Type 5SE
A
10
Miniature circuit breaker with C characteristic
(
I
k
<
400 A)
A
10
Switching frequency
Switching frequency
z
in operating cycles/hour
AC operation
DC operation
Contactors without overload relay
No-load operation fre-
quency
1/h
5000
1000
Rated operation
In acc. with AC-1
In acc. with AC-3
1/h
1/h
650
650
1000
1000
Dependency of switching frequency
z’
on operating current
I’
and operating voltage
U’
:
z’
=
z
⋅
⋅
1.5
1/h
Contactor
Frame size
Type
S3
3RT14 46
Current carrying capacity with alternating current
Utilization category AC-1, switching of resistive
loads
Rated operational currents
I
e
At 40 °C up to 690 V
At 60 °C up to 690 V
At 1000 V
A
A
A
140
130
60
Rated power
of three-phase loads
cos
ϕ
= 0.95 (at 60 °C)
At 230 V
400 V
500 V
690 V
1000 V
kW
kW
kW
kW
kW
50
86
107
148
98
Minimum conductor cross-section loaded with
I
e
At 40 °C
At 60 °C
mm
2
mm
2
50
50
Utilization categories AC-2 and AC-3
with an electrical service life of 1.3 mill. operating cycles
Rated operational current
I
e
Up to 690 V
A
44
Rated power of motors
with slipring or squirrel-cage rotor
at 50 Hz and 60 Hz (at 60 °C)
At 230 V
400 V
500 V
690 V
kW
kW
kW
kW
12.7
22
29.9
38.2
Current carrying capacity with direct current
Utilization category DC-1, switching of resistive loads L/R
≤
1 ms)
Number of conducting paths in series connection
1
2
3
Rated operational currents
I
e
(at 60 °C)
Up to 24 V
60 V
110 V
A
A
A
130
80
12
130
130
130
130
130
130
220 V
440 V
600 V
A
A
A
2.5
0.8
0.48
13
2.4
1.3
130
6
3.4
I
e
I
′
-----
400
V
U
′
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