ABB 1SDA038320R1 Electronic Undervoltage Time Delay Relay YU 220/250V E1/6

1SDA038320R1, commonly known as the YU Electronic Undervoltage Time Delay Relay, is a high-performance accessory designed for ABB SACE circuit breakers. Engineered for industrial power distribution and motor control applications, this undervoltage release (UVR) ensures reliable protection against voltage dips and outages by delaying the tripping command, thus preventing nuisance tripping in unstable power grids.

Key Features

Product Type: Electronic Undervoltage Time Delay Relay

Model Code: YU E1/6

Voltage Rating: 220 – 250 V AC/DC

Compatibility: Designed for ABB SACE Emax E1 and Tmax series circuit breakers (specifically for fixed and withdrawable versions with rated current up to 1600A).

Time Delay: Built-in adjustable electronic time delay to prevent instantaneous tripping during short voltage sags.

Operation: Electrically operated; releases (trips) the circuit breaker when the supply voltage drops below the permissible threshold.

Technical Specifications

Specification Details

Catalog Number 1SDA038320R1

Model YU 220/250V E1/6

Rated Control Supply Voltage (Uc) 220 – 250 V ~ / = (50/60 Hz)

Operating Range 0.85 ... 1.1 x Uc

Threshold (Drop-out) Approx. 0.35 ... 0.7 x Uc

Time Delay Electronic, adjustable (typically 0.1 to 3 seconds depending on configuration)

Power Consumption Low consumption for continuous duty

Insulation Voltage (Ui) 500 V

Mounting Internal accessory for SACE circuit breakers

Applications

The 1SDA038320R1 YU relay is essential for:

Critical Industrial Plants: Prevents shutdowns caused by temporary voltage fluctuations.

Data Centers: Ensures continuity of service by delaying breaker opening, allowing generators or UPS systems to stabilize the voltage.

Commercial Buildings: Protects HVAC and lighting circuits from unstable grid conditions.

Motor Control Centers (MCC): Reduces mechanical stress on motors by avoiding unnecessary restarts.

Why Choose the YU Electronic Undervoltage Relay?

Unlike standard undervoltage releases that trip instantly upon voltage loss, the YU Electronic Time Delay variant provides a programmable delay. This feature is crucial for systems relying on automatic transfer switches (ATS) or backup generators, as it allows the system to switch power sources without disrupting the main circuit breaker.

Compatibility

This accessory is specifically designed for:

ABB SACE Emax E1 (E1/6)

ABB SACE Tmax T6/T7 (with appropriate adapters)

Note: Please verify the breaker frame size and accessory slot compatibility before installation.

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Installation & Safety

Installation should only be performed by qualified electrical personnel. Ensure the circuit breaker is in the "OFF" position and disconnected from the main power supply before inserting the relay into the accessory slot. The YU relay is designed for plug-in installation, making field retrofitting straightforward.

Conclusion

The 1SDA038320R1 Electronic Undervoltage Time Delay Relay YU 220/250V E1/6 is a reliable solution for enhancing the stability and intelligence of your ABB power distribution system. By incorporating a time delay, it reduces downtime and increases the lifespan of your electrical equipment.

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