A typical service case and technical solution of Shanghai Hanshi Electric as the general agent of Schneider Electric's EOCR protector in China:

1、 Customized industrial scenario cases

Maoming Petrochemical Electromagnetic Interference Protection Project

problemHigh electromagnetic interference in the frequency converter cabinet caused the protector to malfunction.

Customize the protection strategy of EOCR-FDM2 split type protector, optimize shielding and grounding design, and achieve the transformation from passive response to active protection. The probability of fault shutdown has decreased by 35%.

Hegang Leting Steel Plant Motor Group Control Project

DemandReduce cable costs and improve monitoring efficiency.

implementationDeploy the EOCR I3M420-WRDUWZ model, centrally manage 200+motors through Modbus RS-485 protocol, reduce cable costs by 30%, and improve fault location efficiency by 40%.

Environmental adaptability renovation of chemical plants

pain pointHigh temperature and dusty environment cause oxidation of the contactor, resulting in frequent false alarms of phase loss (RP fault) in EOCR.

measuresReplace corrosion-resistant relays, optimize control cabinet sealing and install ventilation systems, and regularly clean and maintain. The false alarm rate has decreased to below 0.5%.

II. Technical Fault Diagnosis and Optimization

Mechanical jamming protection linkage of water pump

faultInsufficient lubrication of the bearing caused the rotor to jam, triggering the locked rotor (SC) protection.

solveRepair the transmission system and replenish lubricating oil, synchronously adjust the EOCR start-up time (D-Time) to cover the actual start-up cycle and avoid false tripping

CT function false alarm of overcurrent

sceneAfter installing EOCR-IFM420, the 30kW motor tripped and displayed SC fault (detected value 286A, actual 70A).

root causeNot using a current transformer and not turning off the CT function.

processTurn off the CT function and reset the overcurrent threshold. After calibration, run stably

Three phase voltage imbalance control

Uneven load distribution leads to a current difference exceeding 20%, causing frequent tripping of the protector.

planAdjust the load distribution, install voltage stabilizing devices, and control the imbalance rate within 5%.

3、 New energy and intelligent upgrading

Schneider Wuhan Factory Optical Storage Direct Flexible System

cooperationJointly implementing the "DC Three Element" protection scheme with Haibosichuang, eliminating blind spots in battery system protection and reducing annual energy consumption by 12%.

Deployment of AI Predictive Maintenance Platform

applicationTo provide EOCR Edge solutions for automotive manufacturing customers, warning of bearing wear through current trend analysis and reducing unexpected shutdowns by 50%.

Future plan: By 2025, we will focus on promoting pilot projects for over 20 customers in the field of new energy, and deepen the collaboration between AI algorithms and carbon neutrality courses