ALSTOM 3EST000214-134 Protection Relay

General Description

The 3EST000214-134 is part of ALSTOM’s MiCOM series of numerical relays, known for their flexibility and performance. This particular model is a comprehensive feeder protection unit, integrating multiple protection functions in a compact housing. It is suitable for radial and ring main systems, and can be used with or without voltage inputs for directional control.

Key Features

• Protection Functions: Definite time and inverse time overcurrent (50/51), directional overcurrent (67), earth fault (50N/51N/67N), sensitive earth fault (50SEF/51SEF), and breaker failure (50BF).

• Measurement: Phase and residual currents, voltage (optional), frequency, power, energy, power factor.

• Directional Element: Voltage polarized or current polarized, with memory function for close-in faults.

• Inputs/Outputs: 4 current inputs (1 A or 5 A), 4 voltage inputs (optional), 6 digital inputs, 5 output relays.

• Communication: RS485 Modbus RTU, optional Ethernet IEC 61850 or Profibus DP.

• Event & Fault Recording: Up to 256 events, 20 fault records with oscillography (up to 10 cycles).

• Display: Alphanumeric LCD with backlit, showing real-time values and settings.

Technical Specifications

• Auxiliary Supply: 48-250 V DC / 100-240 V AC,<8 W.

• Current Inputs: 1 A or 5 A rated, continuous 4x rated, dynamic range 0.1-40 A.

• Frequency Range: 50/60 Hz (selectable).

• Accuracy: ±2% for protection, ±0.5% for metering.

• Operating Temperature: -25°C to +70°C.

• Dimensions: 177 x 266 x 210 mm (flush mounting).

• Protection Class: IP52 front, IP20 rear.

Functional Description

The relay continuously samples current and voltage waveforms. Protection elements operate based on user-selectable curves (IEC, ANSI, or custom). Directional elements use either voltage or current polarization to determine fault direction, with adjustable characteristic angles. The relay includes auto-reclosure logic (up to 4 shots) and setting groups (4 groups) for different network configurations. All measured values and statuses are available via communication for SCADA integration.

Applications

• Feeder protection in distribution substations (up to 36 kV).

• Industrial plant incoming feeders and bus-ties.

• Backup protection for transformers and lines.

• Protection of capacitor banks and reactors.

Configuration and Software

Settings can be adjusted via front keypad or using MiCOM S1 software. The software enables offline setting preparation, real-time monitoring, and disturbance analysis. Communication protocols support DNP3, IEC 60870-5-103, and Modbus. The relay also supports time synchronization via IRIG-B or SNTP.

Certifications

• CE, UL, and C-Tick marked.

• Complies with IEC 60255 series and IEEE C37.90.

• Designed for use in substations per IEC 61000-6-5.

Note: This document is for technical reference; refer to the official ALSTOM 3EST000214-134 manual for detailed engineering data.