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Siemens 3RP2576-1NW30 Electronic Star-Delta Timing Relay

Siemens 3RP2576-1NW30 Electronic Star-Delta Timing Relay.

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ManufacturerSiemens

Part number3RP2576-1NW30

Function Star-Delta (Wye-Delta) Timing

Contacts 1 NO Delayed, 1 NO Instantaneous

Time Range 3-60 seconds

Voltage 12-240 V AC/DC (50/60 Hz)

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Electronic star-delta function Adjustable time delay (3-60s) 1 NO delayed + 1 NO instantaneous contact Wide voltage range (12-240V AC/DC) LED status indication Screw terminal connections

Product description

The Siemens 3RP2576-1NW30 is an electronic timing relay specifically designed with a star-delta (wye-delta) starting function. It features one normally open (NO) delayed contact and one normally open (NO) instantaneous contact. The adjustable time range is from 3 to 60 seconds, providing flexibility for motor start-up sequencing.

This relay operates across a wide voltage range of 12-240V AC/DC at 50/60 Hz, making it suitable for various power systems. It includes an LED indicator for status monitoring and uses screw terminals for secure connections. The star-delta function is crucial for reducing inrush current when starting three-phase induction motors.

Stanlo Automation, your veteran-owned source for industrial surplus, offers the Siemens 3RP2576-1NW30 timing relay. We ensure you can find reliable components to manage motor starting sequences and protect your equipment.

Technical specifications

Function	Star-Delta (Wye-Delta) Timing
Contacts	1 NO Delayed, 1 NO Instantaneous
Time Range	3-60 seconds
Voltage	12-240 V AC/DC (50/60 Hz)
Indicator	LED
Terminals	Screw Terminal

Common applications

Three-phase motor starting

Pump control panels

Fan control systems

Conveyor motor starters

Industrial machinery

Automation control panels

Compatible systems

Three-phase induction motors Motor control circuits Automation control panels

Also known as

Siemens Star-Delta Relay 3RP25 Series Timing Relay Siemens Electronic Timer

Replaces / compatible with

Designed to initiate the transition from star to delta configuration for three-phase motors, replacing older electro-mechanical timers or basic contactor logic.

Technical note

Expert tip

The integrated LED on the 3RP2576-1NW30 provides visual feedback on the timing sequence, simplifying diagnostics and commissioning of star-delta motor starters.

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Frequently asked questions

What is the purpose of the star-delta function on the Siemens 3RP2576-1NW30 timing relay?

The star-delta function on the Siemens 3RP2576-1NW30 is used to reduce the high starting current of three-phase induction motors by initially connecting the motor windings in a star configuration, then switching to delta after a set time.