EMAS RR3YU02 is a 230 V AC analogue star delta electronic relay with flasher function, adjustable 3–30 second star timing and a 10 A / 250 V AC changeover output for industrial motor control.
£45.96
The EMAS RR3YU02 is a compact and reliable analogue star delta electronic relay with flasher function designed for industrial motor starting and control applications. As part of the EMAS RR3 series, it combines adjustable star delta timing with dependable relay switching in a rail-mounted format suitable for electrical control panels.
This electronic relay provides controlled transition from star to delta operation, helping automate the starting sequence of three-phase induction motors. The RR3YU02 also incorporates a flasher function for cyclic switching applications, giving control panel designers additional flexibility from a single compact device.
Operating from a 230 V AC supply at 50/60 Hz, the RR3YU02 provides an adjustable 3–30 s star operating time and 50–500 ms star-to-delta transfer time. Its changeover relay output is rated at 10 A / 250 V AC, making it well suited to contactor control circuits and industrial automation panels.
Star delta starting is commonly used to reduce the starting current of three-phase induction motors. The EMAS RR3YU02 manages the timing between the star and delta stages, allowing the motor to begin operation with reduced electrical and mechanical stress before transferring automatically to normal delta operation.
The adjustable star period and transfer delay allow the relay to be configured for different motor starting characteristics. Combined with its flasher functionality, compact rail-mounted housing and long mechanical service life, the RR3YU02 provides a practical control solution for industrial motor starters, machinery and automation panels.
| Manufacturer | EMAS |
|---|---|
| Series | RR3 Series |
| Model | RR3YU02 |
| Product type | Electronic relay |
| Control | Analogue |
| Relay type | Star delta |
| Function | Flasher |
| Operating voltage | 230 V AC |
| Operating frequency | 50 / 60 Hz |
| Contact configuration | 1CO |
| Contact current | 10 A resistive |
| Output type | 1 changeover relay, 10 A / 250 V AC |
| Power consumption | < 7 VA |
| Star operating time | 3–30 s |
| Star-to-delta transfer time | 50–500 ms |
| Impulse withstand voltage | 300 V |
| Insulation resistance | Min. 10 MΩ |
| Operating temperature | -5 to +55 °C |
| Protection rating | IP20 |
| Mounting type | Rail mounting |
| Mechanical life | Min. 10,000,000 operations |
| Electrical life | Min. 100,000 operations |
The EMAS RR3YU02 is an analogue star delta electronic relay used to control timed star-to-delta motor starting sequences and provides an additional flasher function for industrial control applications.
The RR3YU02 operates from a 230 V AC supply at 50/60 Hz.
The star operating period can be adjusted between 3 and 30 seconds, allowing the starting sequence to be matched to the motor and application.
The RR3YU02 provides an adjustable 50–500 ms star-to-delta transfer time.
The relay provides a 1CO changeover relay output rated at 10 A / 250 V AC, suitable for industrial control and contactor switching circuits.
EMAS RR3 series electronic relays provide compact, dependable timing and switching solutions for industrial control panels, motor starting systems and automated machinery where reliable operation and straightforward adjustment are essential.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...