ALSTOM 029.148.924 Enhanced Motor Protection Relay

The ALSTOM 029.148.924 is an enhanced version of the motor protection relay, offering expanded monitoring inputs and advanced communication options for critical motor applications. It builds upon the robust protection of the 029.148.906 with added features for predictive maintenance and seamless integration into plant control systems.

Key Features

• All protection functions of 029.148.906 plus additional sensitive earth fault (64) for ungrounded systems

• 4 analog inputs for direct connection of vibration sensors (4‑20 mA or IEPE)

• 16 RTD inputs for comprehensive stator, bearing, and ambient temperature monitoring

• Dual Ethernet ports with IEC 61850, Modbus TCP, and DNP3 LAN/WAN support

• Integrated phasor measurement unit (PMU) for synchrophasor data

• Cyber‑security features: RADIUS authentication, syslog, and encrypted communication

• Advanced start‑up and load profile recording for performance analysis

Technical Specifications

• Rated current: 1 A / 5 A software selectable

• Thermal model accuracy: ±1.5% with RTD bias

• Vibration input range: 0‑20 mA or ±5 V, 16‑bit resolution

• RTD inputs: 16 three‑wire, galvanically isolated

• Binary inputs: 16 (24‑250 V DC)

• Output relays: 10 (trip, alarm, control)

• Ethernet: 2 x 100Base‑FX / 10/100Base‑T, PRP/HSR capable

• Power supply: dual redundant, 24‑250 V DC

Applications

The 029.148.924 is designed for large critical motors in power plants, petrochemical facilities, and mining operations where condition monitoring is essential. It enables early detection of mechanical issues such as bearing wear or imbalance, reducing the risk of catastrophic failure.

Integrated Condition Monitoring

By combining electrical protection with mechanical condition monitoring, the relay provides a holistic view of motor health. Vibration trends and temperature profiles can be transmitted to asset management systems via OPC UA or MMS protocols. The relay also supports predictive maintenance algorithms that alert operators before faults occur.

The ALSTOM 029.148.924 sets a new standard for motor protection, merging safety, reliability, and intelligence into a single compact device.