Description

ABB MS132-16T Transformer Protection Circuit Breaker

Technical Specifications

• Product Model: MS132-16T
• Brand: ABB
• Warranty: One Year
• Input Voltage: Max 690 VAC
• Operating Temperature: -25°C to +60°C
• Storage Temperature: -40°C to +85°C
• Response Time: ≤ 3 ms short-circuit tripping
• Protection Class: IP20 (DIN rail cabinet installation)
• Accuracy Class: Trip Class 10
• Output Frequency: 50/60 Hz
• Rated Current Range: Adjustable 10 A – 16 A
• Communication Interface: No built-in communication port
• Supported Protocols: N/A
• Overload Capacity: Fixed 20× rated current magnetic trip for transformer inrush
• Dimensions: 81 mm × 45 mm × 78 mm
• 

Product Overview

The MS132-16T is a dedicated 3-pole thermal-magnetic circuit breaker specially engineered for primary side protection of industrial control transformers, belonging to ABB MS132-T special protection series. Unlike standard manual motor starters, this variant features a locked magnetic tripping threshold to withstand the high transient inrush current generated during transformer energization, avoiding nuisance tripping while delivering reliable fuseless overload and short-circuit protection. It eliminates the need for separate fuse holders and auxiliary fuses on transformer power loops, reducing cabinet wiring complexity and spare part inventory pressure for electrical design teams. Panel builders, automation OEM engineers, plant maintenance technicians and electrical safety inspectors gain tangible value from its compact footprint and coordinated protection logic. Equipped with temperature-compensated thermal bimetallic elements, trip-free mechanical interlock and lockable operating handle, it complies with global IEC low-voltage device standards, simplifies periodic electrical system inspection and minimizes downtime caused by transformer winding burnout or short-circuit faults.