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Siemens 3RP2574-1NW30 Star-Delta (Wye-Delta) Timing Relay

Siemens 3RP2574-1NW30 Star-Delta Timing Relay for motor starting.

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ManufacturerSiemens

Part number3RP2574-1NW30

Type Electronic Star-Delta Timing Relay

Manufacturer Siemens

Part Number 3RP2574-1NW30

Time Range 1-20 seconds

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Star-delta (wye-delta) function 1 delayed NO contact 1 instantaneous NO contact Single time range (1-20s) Wide voltage range (12-240V AC/DC) Screw terminals

Product description

The Siemens 3RP2574-1NW30 is an electronic timing relay specifically designed for implementing star-delta (wye-delta) motor starting sequences. It provides 1 delayed NO contact and 1 instantaneous NO contact, crucial for controlling the transition between star and delta configurations. This relay features a single, fixed time range of 1 to 20 seconds, optimized for typical star-delta motor starting applications. It operates on a wide voltage range of 12 to 240V AC/DC and includes screw terminals for secure wiring.

This star-delta timer is essential for reducing starting current and torque in three-phase induction motors, prolonging motor life and minimizing stress on the power supply. It is widely used in applications such as pump control, fan operation, conveyor systems, and other machinery powered by three-phase motors.

Stanlo Automation, a veteran-owned surplus parts distributor, proudly offers the Siemens 3RP2574-1NW30 star-delta timing relay. We are committed to delivering quality automation components with fast shipping and excellent customer service. Trust Stanlo Automation for your industrial control solutions.

Technical specifications

Type	Electronic Star-Delta Timing Relay
Manufacturer	Siemens
Part Number	3RP2574-1NW30
Time Range	1-20 seconds
Voltage	12-240V AC/DC
Contacts	1 NO Delayed, 1 NO Instantaneous
Terminals	Screw
Series	SIRIUS 3RP25

Common applications

Three-phase motor starting

Pump control

Fan control

Conveyor systems

Machine tools

Industrial machinery

Compatible systems

Three-phase motors Motor starter circuits Control panels Automation systems

Also known as

Siemens Star-Delta Timer SIRIUS 3RP2574 Siemens Motor Timer

Replaces / compatible with

Directly replaces other single-function star-delta timers with similar voltage and contact ratings.

Technical note

Expert tip

This relay is designed to be used in conjunction with a suitable star-delta starter configuration, providing the necessary timing for the transition.

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Frequently asked questions

What is the purpose of the Siemens 3RP2574-1NW30 star-delta timing relay?

The Siemens 3RP2574-1NW30 is used to control the starting sequence of three-phase motors via the star-delta method. It manages the transition from the initial star connection to the running delta connection with a set time delay (1-20 seconds).