SIEMENS
4/68
Siemens IC 10 · 2017
Contactors for Special Applications
Contactors for Railway Applications
SIRIUS 3RH2 contactor relays with extended operating range
4
■
Overview
DC operation
IEC 60947-4-1, EN 60947-4-1
The contactor relays are finger-safe according to IEC 60529.
The size S00 contactor relays have spring-type connections for
all terminals.
Ambient temperature
The permissible ambient temperature for operation of the
contactor relays (across the full coil operating range) is -40 to
+70 °C.
Uninterrupted duty at temperatures > +60 °C reduces the
mechanical endurance, the current carrying capacity of the
conducting paths and the switching frequency.
Control and auxiliary circuits
The solenoid coils of the contactor relays have an extended coil
operating range from 0.7 to 1.25 x
U
s
and are fitted as standard
with surge suppressors. The opening delay is consequently 2 to
5 ms longer than for standard contactors.
■
Application
For operation in installations that are subject both to consider-
able variations in the control voltage and to high ambient
temperatures, e. g. railway applications under extreme climatic
conditions, rolling mills, etc.
Also for control supply voltages with battery buffering to extend
the operating time in the event of battery charge failure.
Contactor relays with conventional coil
Control and auxiliary circuits
These contactor relays have an extended operating range from
0.7 to 1.25 x
U
s
; the coils are fitted with suppressor diodes as
standard. An additional series resistor is not required.
Note:
An additional auxiliary switch block cannot be mounted.
Side-by-side mounting
A clearance of 10 mm is required for side-by-side mounting at
ambient temperatures > 60 °C
70 °C.
Contactor relays with series resistor
Control and auxiliary circuits
The DC solenoid systems of the contactor relays are modified
(to holding excitation) by means of a series resistor.
The size S00 contactor relays are supplied prewired with a
plug-on module containing the series resistor. A surge suppres-
sor (a suppressor diode or varistor as preferred) is integrated.
A 4-pole auxiliary switch block (according to EN 50005) can be
fitted additionally.
Side-by-side mounting
Side-by-side-side mounting is permissible at ambient
temperatures up to 70 °C.
Contactor relays with solid-state operating mechanism
Control and auxiliary circuits
The solenoid coils of these contactor relays have an extended
coil operating range from 0.7 to 1.25 x
U
s
and are fitted as
standard with varistors to provide protection against
overvoltage.
The contactor relays are energized via upstream control
electronics which ensure the coil operating range of 0.7 to
1.25 x
U
s
at an ambient temperature of 70
°C. They are supplied
as complete units with integrated coil electronics. A varistor is
integrated for damping opening surges in the coil.
■
Technical specifications
1)
3RH21..-.K contactor relays without the article number suffix "-0LA." are
coupling contactor relays that are certified for the temperature range -25 to
+60 °C. For railway applications, an additional certification approves these
contactors with a minimum distance of 10 mm for the extended tempera-
ture range from -40 to +70 °C.
All details and technical specifications not mentioned here are
identical to those of the 3RH2 basic units;
see from page 5/5
onwards
.
More information
Technical specifications,
see
FAQs,
Manuals,
Contactor relays
Type
3RH21..-2K, -2L
3RH2122-2XB40-0LA2
3RH2122-2XF40-0LA2
General data
Upright
mounting position
• Contactors with series resistor
Special version (on request)
• Contactors with conventional coil
Special version (on request)
Ambient temperature
• During operation
°C
-40 ... +70
1)
• During storage
°C
-55 ... +80
Control
Solenoid
coil
operating range
DC
0.7 ... 1.25 x
U
s
Power consumption of the solenoid coils
For cold coil and 1.0 x
U
s
• Contactors with series resistor
- Closing
W
13
--
--
- Closed
W
4
--
--
• Contactors with conventional coil
- Closing
W
2.8
--
--
- Closed
W
2.8
--
--
• Contactors with solid-state operating
mechanism
- Closing
W
--
4
4.5
- Closed
W
--
0.7
0.75
© Siemens AG 2016