Description

1. Product Title

SACE S4 M5‑2‑ Emax Series Protection Release Unit for Air Circuit Breaker

2. Product Overview

The S4 M5‑2 is electronic protection release unit for ABB SACE Emax series air‑circuit‑breakers. It integrates over‑current, short‑circuit, earth‑fault protection functions, with adjustable current thresholds and time‑delay parameters. It provides local status indication and fault‑event memory, used as replacement trip‑unit spare for low‑voltage main switchboards. It realizes selective protection for power‑distribution systems, protecting generators, transformers and bus‑bars against overload and short‑circuit faults.

3. Technical Specifications

• Brand: ABB SACE
• Model: S4 M5‑2
• Warranty: One Year
• Condition: 100% New & Original
• Device Type: ACB electronic protection trip‑release unit
• Protection Functions: Overload, short‑circuit, earth‑fault protection
• Compatibility: SACE Emax S4 series air circuit breakers
• Mounting: Integral installation inside ACB body
• 

4. Application Scenarios

• Industrial Main‑Switchboard Cabinets: Protection‑release spare for low‑voltage air‑circuit‑breakers in factory power‑distribution rooms.
• Marine Vessel Main Switchboards: Replacement trip‑unit for ship‑board main‑bus‑bar air‑circuit‑breakers.
• Power‑Plant Auxiliary Power Panels: Spare protection‑unit for Emax‑series ACBs in auxiliary‑power‑distribution cabinets.