Siemens 6SE7032-7EE85-0AA0 Regenerative Infeed Unit

Module Feature

6SE7032-7EE85-0AA0 is Siemens SIMOVERT MASTERDRIVES regenerative infeed module.

It is IP00 built-in design, rated input current 270A for 380–480V three-phase AC grid. It realizes bidirectional power flow: rectify AC into constant DC bus voltage for connected inverter units, and feed back motor regenerative energy back to power grid. It integrates line synchronization, current closed-loop control and grid monitoring functions. This model is end-of-life, commonly stocked as critical maintenance spare for legacy multi-drive systems of metallurgical rolling mill, paper machine and crane control cabinet.

Working principle

The module samples grid voltage, grid current and DC bus voltage signals continuously.

IGBT bridge executes phase synchronization and four-quadrant power conversion. During motor motoring state, it converts AC power to DC for inverters; during braking, it converts regenerative DC energy back to sinusoidal AC and returns to grid. It monitors loss of mains, overvoltage, undervoltage, overcurrent and IGBT fault, and sends trip command to lock pulse and record fault events. It communicates with CUVC control board via internal drive bus.

Onboard components

IGBT power bridge, line reactor interface, current and voltage sampling circuit, main control logic board, DC bus capacitor bank, cooling fan, status LED array, power terminal block and metal housing.

LED indicators

Front LEDs indicate power active, RUN status, grid sync, DC bus ready, overload warning and fault alarm.

Hardware self‑diagnosis

Built-in supervision detects phase loss, grid out-of-sync, DC bus over/under voltage, overcurrent, heatsink overtemperature and IGBT short circuit. Commissioning and fault log reading are completed by Siemens Drive Monitor software.

Programming software

Drive Monitor, used for current loop parameter tuning, grid synchronization setting, fault log reading and firmware download.

Electrical & Process Parameters

Model:6SE7032-7EE85-0AA0 Brand:Siemens Device type:SIMOVERT MASTERDRIVES regenerative infeed unit Function:Bidirectional AC/DC conversion, DC bus regulation and regenerative energy feedback for multi-inverter drive system

Mechanical & Structure

Mounting:Built-in rack mount inside drive cabinet Protection class:IP00 Housing:Open frame power module with cooling heat sink

Environmental

Operating temperature:0℃ ~ +40℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing

Certification:CE Status:Discontinued Siemens legacy drive spare

Installation

Power off drive cabinet before replacement.

Check grid side reactor and DC bus wiring, confirm phase sequence, match with CUVC control board and inverters, test grid synchronization, DC bus stability and regenerative feedback function.

Interface

Three-phase AC grid input terminal, DC bus +/- output terminal, FTA control signal connector, internal drive bus to control unit.

Diagnostic

Grid loss alarm: Input fuse blown, cable broken or voltage imbalance. Regenerative fault: Grid impedance abnormal, synchronization signal loss or IGBT module damage. DC bus unstable: Sampling circuit drift, capacitor aging or mismatched inverter load.

Product Brief

Siemens 6SE7032-7EE85-0AA0 infeed unit, SIMOVERT MASTERDRIVES regenerative rectifier spare for heavy-duty multi-drive control cabinet replacement.