SIEMENS 3RB2383-4AA1 Electronic Overload Relay Evaluation Unit

Overview

SIEMENS 3RB2383-4AA1 is a bistable evaluation unit for the SIRIUS 3RB23 modular electronic overload relay system. SIEMENS 3RB2383-4AA1 works with separate 3RB29 current sensing modules to deliver full motor protection, including overload, phase failure, phase unbalance and optional ground fault or PTC thermistor protection. This SIEMENS 3RB2383-4AA1 is widely stocked as spare motor protection evaluation unit for industrial motor control assemblies.

Features

SIEMENS 3RB2383-4AA1 adopts bistable relay output design, the trip status remains locked even when auxiliary supply power is lost. It supports adjustable trip class from Class 5 to Class 30, suitable for standard start and heavy start motor loads. 3RB2383-4AA1 is fitted with screw type auxiliary terminals, supports manual reset and automatic reset mode selection. It provides overload warning signal before trip, and two changeover auxiliary contacts for trip feedback and alarm transmission to PLC or DCS. Expansion modules can be plugged in to add ground fault detection, analog current output and thermistor protection functions. This unit is standalone DIN rail mounted, compatible with contactor frame sizes S00 to S12. It has LED status indicators for power, warning and trip condition. It complies with IEC 60947-4-1, UL and CSA standards, designed for 24/7 continuous operation in pump, fan, compressor and conveyor motor control cabinets.

Specifications

SIEMENS 3RB2383-4AA1 SIRIUS 3RB23 Evaluation Unit Brand: SIEMENS Model: 3RB2383-4AA1 Series: SIRIUS 3RB23 Type: bistable electronic overload relay evaluation unit Trip class: adjustable Class 5, 10, 20, 30 Protection functions: overload, phase failure, phase unbalance Optional functions: ground fault, PTC thermistor, analog output with expansion module Contact type: bistable, 1NO + 1NC per group Terminal type: screw terminal Reset mode: manual / automatic selectable Mounting: DIN rail TH35, standalone installation Dimensions W × H × D: 45 × 111 × 95 mm Protection class: IP20 Ambient temperature: -20℃ ~ +60℃ Status: classic active SIRIUS motor protection spare

Principle

SIEMENS 3RB2383-4AA1 receives current measurement signal from the external 3RB29 current sensing module. This Electronic Overload Relay Evaluation Unit calculates motor thermal load, monitors phase balance and phase continuity. When overload or phase fault exceeds the setting threshold, the bistable relay trips and keeps the trip state. The relay contact opens the motor control circuit and sends alarm signal to host control system.

Applications

SIEMENS 3RB2383-4AA1 is deployed in water treatment pumps, HVAC fans, compressors, conveyor drives and packaging machine motor feeders. It provides comprehensive electronic thermal protection for three-phase AC motors. SIEMENS 3RB2383-4AA1 is stocked as spare evaluation unit for SIRIUS 3RB23 motor protection assemblies.