MERLIN GERIN STR 58 U Circuit Breaker Trip Unit 24VDC

Overview

Product Description

# Merlin Gerin STR 58 U Circuit Breaker Trip Unit – 5000A, 24VDC ## Product Overview The **Merlin Gerin STR 58 U** is a high-capacity electronic trip/control unit designed for use with **Masterpact low-voltage power circuit breakers**. It provides advanced protection and monitoring functions for high-current electrical distribution and industrial power applications. This unit is suitable for applications requiring reliable circuit protection and adjustable protection settings in high-current electrical systems. ## Key Specifications * **Brand:** Merlin Gerin * **Model:** STR 58 U * **Product Type:** Circuit Breaker Trip / Control Unit * **Rated Current (In):** 5000 A * **Supply Voltage:** 24 VDC * **Terminal Connection:** F1 / F2 * **Application:** Masterpact power circuit breaker systems * **Country of Manufacture:** France * **Approx. Weight:** 650 g* *Weight may vary depending on the exact configuration and supplied accessories. ## Protection & Control Functions The STR 58 U control unit is designed to provide adjustable protection functions for high-current circuit-breaker applications. Depending on the configuration, the unit supports: * **Long-time overload protection** * **Short-time protection** * **Instantaneous overcurrent protection** * **Earth-fault protection** * Adjustable protection thresholds and time delays * Fault indication and reset functions * Current measurement / monitoring * Circuit-breaker trip status indication * Control-unit testing functions The STR 58 U documentation identifies adjustment functions including long-time current and delay, short-time pickup and delay, instantaneous protection, and earth-fault protection. ## Typical Applications The Merlin Gerin STR 58 U is intended for high-current electrical distribution and protection applications such as: * Industrial electrical distribution systems * Marine and offshore electrical installations * Power distribution switchboards * Industrial control panels * Large commercial electrical systems * Generator and power-generation switchboards * Heavy industrial facilities * High-current Masterpact circuit-breaker installations ## Compatibility This product belongs to the **Merlin Gerin Masterpact STR control-unit family**. The STR 58 U is documented as a control unit for universal Masterpact applications. **Please verify the circuit-breaker frame, configuration, rating plug and existing control-unit arrangement before ordering to ensure compatibility.** ## Condition **Used / Surplus – Condition as per actual stock.** The product may show normal signs of previous use, storage or handling. Photographs and product specifications should be checked carefully before purchase. ## Important Note This listing describes the **Merlin Gerin STR 58 U 5000A, 24VDC trip/control unit configuration**. Individual units may have different factory markings or configuration details. **Serial numbers, manufacturing codes and other unique identification markings are intentionally not included in this description.** ### Why Choose This Product? The Merlin Gerin STR 58 U provides sophisticated electronic protection and monitoring capabilities for high-current circuit-breaker applications. Its adjustable protection functions make it suitable for demanding industrial and power-distribution environments where dependable circuit protection is required. **Contact us for availability, photographs, compatibility verification and international shipping options.** **International Buyers:** The buyer is responsible for any applicable customs duties, VAT, taxes, import charges or other fees imposed by the destination country.