ABB LDGRB-01 (3AFE61320954P0001) Electronic Overspeed Protection Device

1. Product Overview

Designed specifically for rotating machinery such as turbines and generators, it enables high-reliability speed monitoring and
overspeed shutdown control. Compliant with industrial safety standards, it features independent fault detection, redundant design, and rapid response capabilities.

2. Core Parameters

Model: LDGRB-01 (Part Number: 3AFE61320954P0001)

Input Power Supply: DC 24V (±10% fluctuation tolerance)

Sensing Input: Compatible with MPU/optical sensors (frequency signal)

Speed Range: 0-10,000 rpm (customizable)

Trip Setting: 0-110% of rated speed (0.1 rpm resolution, programmable)

Response Time: ≤ 100 ms

Redundant Design: 2-out-of-3 (2oo3) voting logic (prevents misjudgment)

Output: 2 trip relays, 1 alarm relay, 4-20 mA analog signal

Environment: Operating temperature -20~60℃, protection class IP20 (panel-mounted)

Communication: Optional RS485 (Modbus RTU)

3. Operating Principle

3 independent MPUs collect speed signals;

3 units perform independent calculations, and 2-out-of-3 voting confirms overspeed;

Trigger trip (cut off power), activate alarm, and synchronously upload data to DCS/PLC.

4. Application Scenarios

Power Generation Industry: Protects turbines and generators in thermal/gas/hydropower plants;

Petrochemical Industry: Adapts to compressors and pump drives (prevents leakage/explosion);

Marine Industry: Monitors propulsion turbines and auxiliary generators (resists vibration and humidity);

Heavy Industry: Ensures stable operation of equipment such as rolling mills, cement mills, and air separation compressors.

Main products:

Covering globally renowned brands:

Bently Nevada, Triconex, Woodward, Foxboro, Westinghouse, Reliance, Schneider Modicon, ABB, Allen-Bradley, Motorola, GE Fanuc, Yaskawa, Bosch Rexroth, ACSO, Yokogawa, Rexroth, NI, ICS Triplex, Kollmorgen, Mitsubishi, MOOG, Emerson, B&R, Alstom, EPRO, HIMA, Honeywell, Prosoft, AMAT, Siemens, etc.

Product categories include: DCS system accessories, robot system spare parts, large servo system spare parts, etc., widely used in power, chemical, metallurgy, intelligent manufacturing and other fields.