Alstom MRSU04 Time Delay Relay

Core Performance & Industrial Application

The Alstom MRSU04 is an electromagnetic fixed time delay relay for power system protection.

It is designed for 125V AC/DC supply with 5 seconds fixed delay action, used for sequential control and fault protection.

It has stable contact action performance, strong anti-vibration and EMC resistance, suitable for harsh substation and railway traction environments.

It provides reliable time sequence logic for protection interlock, delay tripping and auxiliary signal control loops.

It adopts rugged metal housing design, long service life and convenient cabinet installation and replacement.

It is widely used in power substations, railway traction power supply and industrial power distribution protection systems.

Technical Specifications

▶ Product type: Fixed time delay protection relay, order no. MRSU04

▶ Brand: Alstom

▶ Rated voltage: 125V AC/DC

▶ Time setting: 5 seconds fixed delay

▶ Type: Electromagnetic relay

▶ Contact: High reliable auxiliary contacts

▶ Frequency: 50 / 60 Hz

▶ Mounting: Panel / cabinet mounting

▶ Operating temperature: -20℃ ~ +60℃

▶ Protection rating: IP20

▶ Feature: Shock resistant, stable timing, for protection interlock

▶ Country of origin: France

▶ Compliance: CE certification

Industry Applications

Applied in power substation, railway traction power supply and industrial power distribution room for protection and control circuit spare replacement.

Note: Confirm operating voltage and contact logic before ordering