Contactors With Extended Operating Range; Overview; Contactors With Uc Drive - Siemens SIRIUS 3RT Series System Manual

2.4.8

Contactors with extended operating range

2.4.8.1

Overview

Contactors with an extended operating range are available for certain applications. The table
below shows the different contactor versions and their key design features.
Table 2- 11 Overview - Contactors with extended operating range
Contactors with UC
drive
Contactor versions Contactors with
electronic drive
(size S0)
Coil Preferred 
voltages


Operating 0.7 to 1.3 x U
range
Temperature range -25 to +60 °C
At 280 V: high limit = 1.1 x U
1)
Rated powers
The various contactor versions with an extended operating range have the following rated
powers (with the exception of the coupling relays). For the 3RH21 contact relay versions the
performance range extends up to 10 A at a voltage of 230 V. For the 3RT20 motor contactor
versions the maximum power values are 5.5 kW (size S00) and 18.5 kW (size S0) at a
voltage of 400 V.
The performance range of the 3RH21 coupling relays for switching auxiliary circuits is the
same as that of the 3RH21 contactor relays. The performance range of the 3RT20 coupling
relays in size S00 extends up to 5.5 kW at a voltage of 400 V. In size S0, the maximum
power value is 15 kW at a voltage of 400 V.
2.4.8.2

Contactors with UC drive

The contactors with a UC drive (size S0) are used for switching electrical loads in the main
circuit. They feature a wide voltage range and an extended operating range of
0.7 to 1.3 x U
Reference
More information ...
About the properties of the UC drive
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
Contactors for railway applications
Contactors with
series resistor
(size S00)
21 to 28 V UC

95 to 130 V UC

200 to 280 V UC
1)
0.7 to 1.25 x U
S
-40 to +70 °C
.
S
. A temperature range of -25 to +60 °C applies to contactors with a UC drive.
S
SIRIUS 3RT2 contactors/contactor assemblies
Contactors with
electronic drive
(size S0)
24 V DC 24 V UC

110 V DC 110 V UC

0.7 to 1.3 x U
S
-40 to +70 °C
Can be found in the chapter titled ...
Drive system/Coil selection (Page 117)
2.4 Configuration
Coupling relays
Coupling relays Coupling relays
for railway (sizes S00 and
applications S0) and auxiliary
(sizes S00 and coupling relays
S0) (size S00)
24 V DC
 24 V DC
110 V DC

0.7 to 1.25 x U 0.7 to 1.25 x U
S S
-40 to +70 °C -25 to +60 °C
S
127