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An overview of the

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The full range of Sirius switchgear meets the switching requirements of industrial loads.They include contactors, contactor combinations and soft starters, up to electronic switchgear for frequent switching of resistive loads and motors.

Siemens Sirius 3RT.4 Contactor for Resistant Loads, (AC-1), Tripole

3-pole AC-1 contactor

Top row 3RT148 contactor

Bottom row: 3RT244, 3RT145 to 3RT147 contactors

standard

IEC/EN 60947 1, IEC/EN 60947 4 1, IEC/EN 60947 5 1 (auxiliary contact)

The connection method

The primary loop

3RT244 contactor has screw type terminals with box type terminals;When the box terminals are removed, they can be connected directly to the connecting bus using a cable head.

3RT145 to 3RT147 Contactors: Screw-type terminals to which a cable may be connected via a cable end or a flexible or rigid bus.Alternatively, box terminals are provided as attachments.

3RT148 contactor: bus connection

Auxiliary/control circuits

Screw type terminals

Type of operation mechanism

3 rt244 contactor

These contactors are offered as models with conventional AC or DC operating mechanisms, or as models with a wide range of solid-state operating mechanisms and a common actuating voltage (AC or DC operating).

In the operating voltage range of 0.8 to 1.1 x Us, it is usually controlled via the control supply voltage connectors A1-A2.

3RT145 to 3RT147 contactors

Type of control and operation mechanism:

Standard Operating Mechanism with AC and DC Operating Mechanism Circuits (Switching from Closed Coil to Withdrawal Coil)

Solid state operating mechanism

For contactors with solid-state operating mechanisms, an overvoltage damping device is integrated into the contactor circuit into the operating mechanism coil.The operating mechanism is powered by a power supply voltage in the operating range of 0.8 to 1.1 x Us, or can be controlled according to the mode of operation selected.Or through a separate 24 V DC control signal input.A variety of rated voltage ranges for AC/DC control are provided.

The following models are available:

There are two modes of operation: direct control or input via CPU

Ditto, but with additional remaining life indicator (RLT)

Fault-safe PLC input with simplified safe application (mode of operation cannot be selected)

3RT148 contactor:

These contactors are equipped with a solid-state actuator electronic drive for AC/DC control with integrated coil attenuation.Operating voltage range is 0.85…Us 1.1 x.

Solenoid coils/operating mechanisms

3 rt244 contactor

The coil can be replaced.

3RT145 to 3RT147 contactors

3RT14..A/-.N/-.P contactor operating mechanism removable, and only need to remove the lock and pull out can be replaced.

Note: For 3RT14 with fail-safe control function..S contactor, can not be removed or replaced the operating mechanism.

3RT148 contactor:

The operating mechanism of the 3RT148 contactor is removable and can be replaced by simply unlocking and pulling out.

Accessories and Spares

For 3RT244 contactors, see “Sirius 3RT2 Contactors and Sirius 3RH2 Contactors Relays Accessories and Spares”.

For 3RT145 through 3RT147 contactors, see “Sirius 3RT1 Contactors and Sirius 3RH1 Contactor Relays Accessories and Spare Parts”.

For 3RT148 contactor, please refer to “Attached Order Data”.

Contactors in safety-related applications

Contactors are an important part of safety-related applications.They are usually devices that perform a break operation and can safely disconnect the application or system.

Contactors with mirrored contacts conforming to IEC 60947-4-1 are generally required for use in safety-related applications.The majority of Siemens contactors meet this requirement and are described in the Technical Product Data Sheet.

Contactors with enhanced anti-damage protection

By using Siemens contactor size with factory installed permanent mounting auxiliary contacts (e.g. 3RT2…To…-3MA0 contactor and 3RT1…To…-3PA0 contactor), or through the use of 3RT2916-4MA10 or 3RT1926-4MA10 seal cover attachment, can ensure increased protection against damage.

Connect the contactor to the fail-safe control module

A low-power contactor can be directly connected to the output of a failsafe controller, whereas safety-related applications using standard contactors with higher power are more complex due to the need for coupling connectors.With fail-safe control inputs, special models of specifications S6 through S12 (3RT14…S) provides a much simpler implementation.

3RT1355-6AE36

Conactor, AC-1, 200 A/400 V/40 °C, S6, 4-pole, 24-60V AC, 20-60V DC, 2 NO + 2 NC, connection bus/bolted terminal connection

According to the price

3RT1355-6AF36

Conactor, AC-1, 200 A/400 V/40 °C, S6, 4-pole, 48-130V AC/DC, 2 NO + 2 NC, connection bus/bolted terminal connection

According to the price

3RT1355-6AP36

Contactor, AC-1, 200 A/400 V/40 °C, S6, 4-pole, 100-250V AC/DC, 2 NO + 2 NC, connection bus/bolted terminal connection

3RT1355-6AR36

Conactor, AC-1, 200 A/400 V/40 °C, S6, 4-pole, 250-500V AC/DC, 2 NO + 2 NC, connection bus/bolted terminal connection

3RT1363-6AE36

Contactor, AC-1, 275 A/400 V/40 °C, S10, 4-pole, 24-60V AC, 20-60V DC, 2 NO + 2 NC, connection bus/bolted terminal connection

3RT1363-6AF36

Contactor, AC-1, 275 A/400 V/40 °C, S10, 4-pole, 48-130V AC/DC, 2 NO + 2 NC, connection busbar/bolted terminal connection

3RT1363-6AP36

Contactor, AC-1, 275 A/400 V/40 °C, S10, 4-pole, 100-250V AC/DC, 2 NO + 2 NC, connection bus/bolted terminal connection

3RT1363-6AR36

Contactor, AC-1, 275 A/400 V/40 °C, S10, 4-pole, 250-500V AC/DC, 2 NO + 2 NC, connection bus/bolted terminal connection

3RT1364-6AE36

Conactor, AC-1, 350 A/400 V/40 °C, S10, 4-pole, 24-60V AC, 20-60V DC, 2 NO + 2 NC, connection bus/bolted terminal connection

3RT1364-6AF36

Conactor, AC-1, 350 A/400 V/40 °C, S10, 4-pole, 48-130V AC/DC, 2 NO + 2 NC, connecting bus/bolted terminal connection

SIEMENS SIRIUS 3RT23 Conactors for Resistant Loading (AC-1), 4-P., 4S, 18…50 A

3RT231 to 3RT234 and 3RT135 to 3RT137 contactors with screw type terminals

standard

IEC/EN 60947 1, IEC/EN 60947 4 1, IEC/EN 60947 5 1 (auxiliary contact)

Specifications S00 to S3

The 3RT23 contactor has two auxiliary contacts (1 NO and 1 NC).

Specifications S6 to S12

The 3RT13 contactor has two auxiliary contacts (2 NO and 2 NC).

The connection method

The primary loop

Specifications S00 and S0: screw or spring type terminals, spring type terminals have easy insertion design for mounting connectors

Specifications S2 and S3: Screw type terminals with box type terminals;After the box terminals are removed, they can be connected directly to the connecting bus using a cable head suitable for S3.

Specifications S6 to S12: screw type terminals for connecting busbars. Cables may be connected to these terminals via cable ends or flexible or rigid busbars.S10 and S12 contactors can be fitted with bias bus connectors, please see the attachment below.

Auxiliary/control circuits

Specifications S00-S3: screw or spring type terminals

Specifications S6 to S12: screw type terminals

Type of operation mechanism

Specifications S00 to S3

3RT23 contactors are available as models with conventional AC or DC operation, or as models with a wide range of solid-state operation and a common execution voltage (AC or DC operation).

In the operating voltage range of 0.8 to 1.1 x Us, it can be controlled via the control supply voltage connectors A1-A2 (usually in this way).

Specifications S6 to S12

The 3RT13 contactor is fitted with a wide range of solid-state operating mechanisms that can be controlled by 50/60 Hz AC and DC power supplies.

The DC control operates from 0.8 x US (minimum) to 1.1 x US (maximum) and the AC operates from 0.85 x US (minimum) to 1.1 x US (maximum).

The operating mechanism cannot be changed.

Install additional auxiliary contacts

Specifications S00

4 auxiliary contacts, not more than 3 normally closed contacts

Specifications S0 to S3

Four additional auxiliary contacts, not more than 2 normally closed contacts.

Specifications S6 to S12

An additional auxiliary contact (with 1 NO + 1 NC) can be mounted on each side.

Sirius 3RT25 Contactor, 4 poles, 2NO+2NC, 4…11 kW

standard

IEC/EN 60947 1, IEC/EN 60947 4 1, IEC/EN 60947 5 1 (auxiliary contact)

These contactors are suitable for use in all weather conditions.They are safe to touch with a finger and meet IEC 60529 requirements.

Here, accessories and spare parts for the 3-pole 3RT2 contactor are also available for the 4-pole contactor, see Accessories and spare parts for the Sirius 3RT2 contactor and Sirius 3RH2 contactor relays.

S0 to S3 contactors have 2 auxiliary contacts (1 normally open and 1 normally closed) integrated into the base unit.

Auxiliary contacts can be installed

Specifications S00 to S3

Four additional auxiliary contacts, not more than 2 normally closed contacts.

For a general description of 3RT2 contactor sizes S00 through S3, see Sirius 3RT Contactors, 3 poles up to 250 kW.

Use 3RT contactor in conjunction with IE3/IE4

Sirius 3RT16 Capacitor Contactor, 12,5… 75 kvar

standard

IEC/EN 60947 1, IEC/EN 60947 4 1, IEC/EN 60947 5 1, IEC/EN 60831 1, IEC/EN 61921

The 3RT26 contactor is suitable for use in all weather conditions.They are safe to touch with a finger and meet IEC 60529 requirements.

function

The 3RT26 contactor for split capacitive load (AC-6B) is a special 3RT20 contactor for split off container groups in specifications S00 through S3.

They are designed to transmit surge currents in such applications and are fusing resistant to the relevant technical specifications.

3RT26 contactors are suitable for capacitors with or without reactor protection.They are not only used in power capacitor breaking in reactive current compensation system, but also used in frequency converter breaking control.

For 3RT26 contactor, the precharge resistor is one of its indispensable components.The precharge resistor is switched on by means of a leading auxiliary contact before the main contact is closed.During the split operation, they are decoupled after the peak current decays.The attenuation of the surge current peak can also reduce the interference harmonics in the power supply.

Note:

The 3RT26 contactor only allows switching on discharge capacitors.

It is not allowed to be functionally tested by manual operation.The series resistor shall not be removed.

Auxiliary switch

The difference of unallocated auxiliary contacts is great.Please refer to order data for available models.Can provide other different types or models of products.

In specifications S00 and S0, the auxiliary contacts clipped to the capacitor contactor consist of three lead normally open contacts and one unallocated auxiliary contact.In addition, the basic unit has one (S00) or two (S0) idle auxiliary contacts.

The corresponding model 3RT26 contactors with specifications S00 and S0 cannot be fitted with additional auxiliary contacts.For specifications S2 and S3, an optional auxiliary contact can be provided with a side auxiliary contact block.On the side, more auxiliary contacts can be installed corresponding to the 3RT20 contactor.

Now, a device with two normally closed contacts can operate continuously and stably over the full power range.

3TK1, 4-pole (4 normally open), for controlling resistive load (AC-1)

Contactor for enhanced tolerance, 0.7… 1.25xus, used for railways

Sirius 3RT20 Motor Contactor 5,5… 18, 5 kW

standard

IEC/EN 60947 4 1, IEC/EN 60077 2, EN 50155

Scope of performance

Specifications S00 to S3

3RT20 contactor for motor loads up to 110 A / 55 kW (AC 3)

Specifications S6 to S12

3RT10 contactor for motor loads from 55 kW to 500 A / 250 kW (AC-3)

3RT14 contactor for resistive loads up to 690 A (AC‑1)

application

In addition to the standard certification in accordance with IEC 60974-4-1, contactors with extended working range are also certified in accordance with IEC 60077‑2 relevant sections to meet the requirements for use in railway applications.

Therefore, they can be guaranteed to improve the suitability of requirements, such as:

Extended temperature range compared to product standard IEC 60497-4-1, or

To extend the operating range or range of an electromagnetic coil

Improves the resistance to mechanical oscillation and vibration.The design of the terminals in the spring-type connection system also contributes to vibration resistance.

model

In addition to the complete motor contactor family (AC-3) with specifications S00 through S12 (3RT.0) and up to 250 kW, new 3RT14 contactors are available from specification S6 onwards, optimized for AC-1 operation up to 525 kW in various operating conditions.

The working range of the contactor operating mechanism

The railway certified contactor with extended operating range offers a solid state DC operating mechanism in all specifications from S00 to S12.

The operating voltage range of the mechanism is from 0.7 to 1.25 x Us in the temperature range of -40 to 70 °C.Over-voltage damping of contactor coils with varistor circuits has been achieved.

From specification S6 onwards, the operating mechanism is equipped with an additional control input that can operate between 24 DC and 110 V.This feature can be turned on or off with a selector switch.

Auxiliary switch

As with their counterparts in standard motor contactors, these devices may be equipped with auxiliary contacts (see “Power Contactors for breaking motors” for a general view of contactors).

The environment temperature

The allowable operating ambient temperature of these contactors (over the entire operating range of the operating mechanism) is from -40°C to +70°C.

Installed side by side

Contactors with conventional operating mechanisms

Specifications S00 and S0:

It can be installed side by side at ambient temperatures up to 60 ° C.A clearance of at least 10 mm must be provided between 60 °C and 70 °C.

Contactor with series resistance

S00 specifications:

It can be installed side by side at ambient temperatures up to 70 ° C.

Conactors with solid state operating mechanism (model: 3RT….-…0 la2)

Specifications S00 to S3:

It can be installed side by side at ambient temperatures up to 70 ° C.

Specifications S6 to S12:

It can be installed side by side at ambient temperatures up to 60 ° C.A clearance of at least 10 mm must be provided between 60 °C and 70 °C.

Siemens contactor relay Sirius 3RH21

Siemens 3TH4 contactor relay

standard

IEC/EN 60947 4 ‑ ‑ 1

Contact relay protection against electric shock, according to EN 60529.Depending on the configuration with other devices, the terminal cover needs to be installed on the connecting bus.

The environment temperature

The allowable ambient temperature for contactor operation (over the entire operating range of the coil) is between — 50 °C and +70 °C.Continuous operation at temperatures ranging from -25 °C to +55 °C will reduce the service life of the machine, the current-carrying capacity of the current path, and the switching frequency.

When the ambient temperature is greater than 55 °C, there must be a 10mm gap between adjacent contactors.There is no need to reduce the technical specifications.

application

It can be used in devices with wide variations in control voltage and high ambient temperature, for example in railway applications.

Control and auxiliary circuits

The coil of the contact relay has an extended coil operating range of 0.7 to 1.25 x Us and is provided with a variable resistor for overvoltage protection as a standard component.Therefore, the operating delay is between 2 and 5 ms longer than the standard contactor.

3TH4244-0LB4

Auxiliary contactor, 44E, DIN EN 50011, 4NO+4NC for track application, bolt type terminals connected to work area 0.7-1.25xus with variable resistor 24V DC

3TH4244-0LF4

Auxiliary contactor, 44E, DIN EN 50011, 4NO+4NC for track application, bolt type terminals connected to work area 0.7-1.25xus for variable resistor 110V DC

3TH4253-0LB4

Auxiliary contactor, 53E, DIN EN 50011, 5 NO + 3 NC for rail application, bolted terminal connection, working area 0.7-1.25xus connected variable resistor 24V DC

3TH4253-0LF4

Auxiliary contacts, 53E, DIN EN 50011, 5 NO + 3 NC for rail application, bolted terminal connection, working area 0.7-1.25xus connected variable resistor 110V DC

3TH4262-0LB4

Auxiliary contactor, 62E, DIN EN 50011, 6 NO+2 NC for track application, bolted terminal connected working area 0.7-1.25xus with variable resistor 24V DC

3TH4262-0LF4

Auxiliary contactor, 62E, DIN EN 50011, 6 NO+2 NC for track application, bolted terminal connected working area 0.7-1.25xus with variable resistor 110V DC

3TH4262-0LF8

Auxiliary contactor, 62E, DIN EN 50011, 6 NO+2 NC for track application, bolted terminal connected working area 0.7-1.25xus with variable resistor 100 V DC

3RH11 contactor relay

Dc operation

IEC/EN 60947 4 ‑ ‑ 1

Contact relay protection against electric shock, according to EN 60529.Specifications S00 contactor relays have spring-type terminals for connecting all terminals.

The environment temperature

The allowable ambient temperature for contact relay operation (over the entire operating range of the coil) is between -40 and +70 °C.

Continued operation at >+60 °C reduces machine life, current path load capacity and maximum switching cycles.

Control and auxiliary circuits

The solenoids of the contactor relays have an extended coil operating range of 0.7 to 1.25 x Us and are equipped with surge suppressors as standard components.Therefore, the operating delay is between 2 and 5 ms longer than the standard contactor.

application

It is suitable for use in devices where the control voltage varies greatly or the ambient temperature is high, such as railway applications in harsh weather conditions and rolling mill applications.

It is also applicable to control voltages with battery buffering to extend the running time when the battery fails to charge.

Contact relay with conventional coil

Control and auxiliary circuits

These auxiliary contactor relays have an extended operating range of 0.7 to 1.25 x Us;The solenoid is serially connected to the rheostat.No additional series resistor is required.

Pay attention to

Additional auxiliary circuit terminals cannot be installed.

Installed side by side

When the ambient temperature >60 °C≤70 °C, there must be a 10mm interval between adjacent contactors.

The contactor relay has a series resistance

Control and auxiliary circuits

The DC solenoid of the contactor relay must be switched through a series rheostat to maintain excitation.

The contact relays are completely pre-wired and include plug-in modules containing series rheostats.Integrated surge suppressor (varistor).

Siemens 3RH, 3TH contactor type relay

The contact relay is a type of switchgear used for control and auxiliary circuits, as well as for control, signaling and locking, and switchgear interlocking.Of course, Sirius 3RH2 contactor relays are equipped with standard connection name symbols and connection systems to save installation time and overhead.This makes them particularly suitable for practical applications.The 3RH2 contactor relay has the same dimensions and design as the S00 motor contactor — a distinct advantage, especially in accessories.

They are designed for AC or DC service and are provided with screw or spring type terminals.The basic contactor relay uses a 4-pole design that is expandable to up to 8 poles by means of a clamping auxiliary contact.

Siemens 3RH2 Sirius auxiliary contactors, 4- and 8- poles

3RH2122-1AB00

Auxiliary contactor,2 NO + 2 NC, 24 V AC, 50/60 Hz, size S00, bolt type terminal connection

3RH2122-1AC60

Auxiliary contactor,2 NO + 2 NC, 32 V AC, 50 Hz, 38 V, 60 Hz, size S00, bolt type terminal connection

3RH2122-1AD00

Auxiliary contactor,2 NO + 2 NC, 42 V AC, 50/60 Hz, size S00, bolt type terminal connection

3RH2122-1AF00

Auxiliary contactor,2 NO + 2 NC, AC 110 V, 50/60 Hz, size S00, bolt type terminal connection

3RH2122-1AG60

Auxiliary contactor,2 NO + 2 NC, 100 V AC, 50 Hz, 100…110 V, 60 Hz, size S00, bolt type terminal connection

3RH2122-1AH00

Auxiliary contactor,2 NO + 2 NC, 48 V AC, 50/60 Hz, size S00, bolt type terminal connection

3RH2122-1AK20

Auxiliary contactor,2 NO + 2 NC, 120 V AC, 50/60 Hz size S00, bolted terminal connection

3RH2122-1AK60

Auxiliary contactor,2 NO + 2 NC, AC 110 V, 50 Hz, 120 V, 60 Hz, size S00, bolt type terminal connection

3RH2122-1AL00

Auxiliary contactor, 2 NO + 2 NC, 125 V AC, 50/60 Hz size S00, bolted terminal connection

3RH2122-1AM20

Auxiliary contactor,2 NO + 2 NC, 208 V AC, 50/60 Hz size S00, bolted terminal connection

standard

IEC/EN 60947 1, IEC/EN 60947 4 1, IEC/EN 60947 5 1

3RH2 contactor relays are available with screw or spring type terminals.The base unit consists of four contacts with terminal names conforming to EN 50011.

3RH2 contactor relays are suitable for use in any climate.They are safe to touch with a finger and meet IEC 60529 requirements.

The 3RH21 coupling contactor relay for switching the auxiliary circuit is customized to the specific requirements of the electronic control unit used with it.

Contact reliability

It has high contact stability when voltage and current are low. It is suitable for electronic type with current ≥ 1 mA and voltage ≥ 17 V.

Surge suppression

RC elements, rheostats, diode goods, or diode assemblies (a combination of diodes and zener diodes) can be plugged into all intermediate relays from the front to dampen the open-circuit surge current in the coil.The insertion direction is determined by the encoding device.

Coupled contactor relays have lower power consumption and extend the operating range of the solenoid coils.

Depending on the model, the supplied solenoid coil has no overvoltage drop (3RH21.. -.. HB40 and 3RH21.. -.. MB40-0KT0) and comes with a standard diode or suppressor.

The attachment

Accessories for the S00 3RT2 contactor are also available for the 3RH2 contact relays, see appendix Sirius 3RT2 contactors and Sirius 3RH2 contact relays.

Auxiliary switch

3RH21 contactor relays (other than coupling contactor relays) can be extended by up to 4 contacts by adding mountable auxiliary contacts.

The auxiliary switch can easily get stuck on the front of the contactor.The auxiliary circuit terminal has a centrally positioned release rod for disassembly.

Traditional front auxiliary contacts satisfy the characteristics of forward drive operation and are suitable for safety applications.

Contactor relays for safety-related applications

Contactors are an important part of safety-related applications.They are usually devices that perform a break operation and can safely disconnect the application or system.Contactor relays with positive drive operation conforming to IEC 60947-5-1 are normally required for use in safety-related applications.Most of Siemens contactor relays meet this requirement and are described in the Technical Product Data Sheet.

Contactor relays with improved damage protection

Increased damage protection can be ensured by the use of Siemens contactor relay models with factory mounted permanent auxiliary contacts (e.g. 3RH22 contactor relay) or by the use of 3RT2916-4MA10 seal cover accessories.

Siemens 3TH4 contactor type relays, 8-pole and 10-pole

standard

IEC/EN 60947 ‑ 1, IEC/EN 60947 ‑ ‑ 1

3TH42 and 3TH43 contactor relays are suitable for use in all climates.They are safe to touch with a finger and meet IEC 60529 requirements.

Note:

3TH42 and 3TH43 contactor relays have positive drive action in accordance with IEC 60947‑5‑1 (version 3.1).

Terminal names conform to EN 50011

3TH42/3TH43 contact relays comply with EN 50011 standard for “special contact relays” with respect to their terminal name, identification number and identification letter.

Contact reliability

Due to the use of double-break contacts, high contact stability can be achieved at low voltages and currents, suitable for electronic circuits with voltages ≥ 17 V and currents ≥ 1 mA.

Surge suppression

3TH42/3TH43 contactor relays can be equipped with RC elements, rheostats, diodes or diode assemblies (one diode combined with a Zener diode) to suppress open-circuit surges.Surge suppressors can be mounted directly on the coil. See “Accessories for 3TH contactor relays and small contactor relays.”

Note:

If the contactor coil can be protected from voltage spikes (interference suppression diode for 6 to 10 times;Diode assembly for 2 to 6 cycles;The rheostat is +2 to 5 ms), the delay disconnection time for normally open contacts and the delay closure time for normally closed contacts increases.

The installation

Note:

For AC operating 3TH4 contact relays, 1.1 x Us overvoltage, ambient temperature ≥ 45°C, and 100% on-off time for all contactors, care should be taken to leave a clearance of at least 5 mm between the contactors when mounted side by side.

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