Product Description
Siemens 3RH1911-1FA31 4-pole auxiliary contact block with three normally open (N.O.) and one normally closed (N.C.) for front mounting on Sirius size S00 (3RT1015, 3RT1016, 3RT1017) contactors. This auxiliary comes with screw terminals and only 1 can be mounted per contactor but additional contact arrangements are available, such as the 3RH1911-1FA22 or the 3RH1911-1FA40.
IEC 60 947, EN 60 947 (VDE 0660), UL 508
DESIGN
The 3RT1 contactors are suitable for use in any climate. They are safe from touch to DIN VDE 0106 Part 100. The 3RT1 contactors are available with screw connections or with Cage Clamp connections. An auxiliary contact is integrated in the basic unit of size S00 contactors. The basic units of sizes S0 to S3 only contain the main conducting paths. All the basic units can be extended with auxiliary switch blocks. Cabinet units with 2 NO + 2 NC (terminal designations acc. to EN 50 012) are available as of size S0; the auxiliary switch block is removable. The size S3 contactors have removable box terminals for the main conductor connections. Ring cable lugs or bars can thus also be connected.
CONTACT RELIABILITY
If voltages ≤ 110 V and currents ≤ 100 mA are to be switched, the auxiliary contacts of 3RT1 contactors and 3RH11 contactor relays should be used to ensure good contact stability. These auxiliary contacts are suitable for electronic circuits with currents ≥ 1 mA at a voltage of 17 V. For the short-circuit protection of contactors without an overload relay, see the technical data.
SHORT CIRCUIT PROTECTION OF CONTACTORS
For the short-circuit protection of contactors with an overload relay, see section 3.
MOTOR PROTECTION
3RU11 overload relays can be mounted onto the 3RT1 contactors for protection against overloads. The overload relays must be ordered separately (see section 3).
