ABB YU-1SDA038306R1 Product Description

Overview

ABB YU-1SDA038306R1 is an undervoltage release manufactured by ABB SACE, 1SDA038306R1 is the complete order part number of this unit. The ABB YU-1SDA038306R1 is rated 24V DC, designed for E1, E2, E3, E4, E6 and T8 series circuit breakers, it will trip the breaker automatically when control voltage drops below the threshold. This YU-1SDA038306R1 undervoltage release serves as a reliable ABB SACE YU undervoltage release accessory, widely used for low voltage power distribution protection in switchgear panels of the ABB SACE YU undervoltage release accessory.

Features

This ABB YU-1SDA038306R1 is a built-in plug-in accessory for compatible ABB SACE breakers for the ABB SACE YU undervoltage release accessory. It must be continuously energized to keep the breaker closed; loss or severe drop of control voltage triggers immediate breaker opening. It adopts robust coil insulation structure and stable electromagnetic performance. It can be matched with optional delay unit to avoid nuisance tripping caused by transient voltage dip. The ABB YU-1SDA038306R1 is easy to install and replace, works with other breaker accessories including YO, YC and auxiliary contacts. It is suitable for industrial power distribution environments with strict power loss protection requirements of the YU-1SDA038306R1 undervoltage release.

Specs

The ABB YU-1SDA038306R1 series: YU undervoltage release. Rated control voltage: 24V DC. Compatible breaker: E1, E2, E3, E4, E6, T8. Mounting: internal breaker accessory. Function: undervoltage protection trip. The ABB YU-1SDA038306R1 complies with IEC 60947-2 and CE standards as a YU-1SDA038306R1 undervoltage release.

Principle

ABB YU-1SDA038306R1 operates based on electromagnetic holding principle. When the 24V DC control voltage is normal, the coil generates magnetic force to hold the trip latch, allowing the breaker to stay closed. The ABB YU-1SDA038306R1 will lose magnetic holding force when the voltage falls below the release threshold, and the spring mechanism releases the latch to open the breaker main contacts. The breaker cannot be closed again until the control voltage recovers to normal range. The electromagnetic holding structure of the ABB SACE YU undervoltage release accessory realizes power loss and undervoltage protection.

Applications

This ABB YU-1SDA038306R1 is widely used in industrial main switchboards, generator control panels, data centre power distribution and marine low voltage systems. It is applied for motor and load protection against voltage collapse and power failure. It is used for spare replacement and retrofit of legacy ABB SACE Emax and T8 breaker installations. The ABB YU-1SDA038306R1 delivers dependable undervoltage protection for low voltage circuit breakers as a proven YU-1SDA038306R1 undervoltage release.