1SDA073700R1  ABB   Accessories  Module

What’s app/Mobile:86-18020776792     Skpye:miyazheng520

Email:miya@mvme.cn (click)     Contact our manager : Miya

The 1SDA073700R1 is an undervoltage release (UVR) accessory module designed by ABB for integration with SACE Emax 2 air circuit breakers and Tmax XT molded case circuit breakers. It is used to continuously monitor control supply voltage and automatically trigger breaker opening when the voltage falls below a defined operational threshold, ensuring fail-safe electrical system behavior in industrial and infrastructure applications.This device is classified as a protective breaker accessory, operating as an electromechanical safety interface between control voltage integrity and circuit breaker mechanical actuation.

Q1: What is the functional classification and electromechanical protection topology of the 1SDA073700R1 within ABB SACE breaker accessory ecosystems?

A:
The 1SDA073700R1 is classified as an undervoltage release (UVR) accessory module, designed for ABB SACE circuit breakers such as Emax 2 and Tmax XT series. It operates by continuously monitoring control supply voltage and triggering breaker opening when voltage falls below a defined threshold, ensuring fail-safe disconnection under abnormal power conditions.

Q2: How does the 1SDA073700R1 implement voltage-dependent trip logic under AC/DC dual-mode excitation conditions?

A:
The 1SDA073700R1 supports 220–240 V AC/DC control supply operation, enabling universal integration into industrial control architectures. Its internal electromagnetic coil is energized only when voltage remains within acceptable limits; a voltage drop causes immediate de-energization, initiating mechanical release of the breaker latch.

Q3: What is the fail-safe operational philosophy embedded in the 1SDA073700R1 undervoltage release mechanism?

A:
The 1SDA073700R1 is engineered on a fail-safe principle, meaning the circuit breaker cannot remain closed without a stable control voltage. In the event of supply failure, brownout, or control circuit interruption, the module automatically forces breaker opening, ensuring protection continuity in safety-critical power systems.

Q4: How does the 1SDA073700R1 ensure coordination with Emax 2 and Tmax XT mechanical trip assemblies?

A:
The 1SDA073700R1 interfaces directly with ABB SACE breaker mechanical trip units through a modular plug-in accessory architecture. When undervoltage conditions occur, the coil-driven actuator mechanically disengages the closing latch system, ensuring synchronized operation with breaker kinematics across multiple frame sizes (E1.2–E6.2, XT7–XT7M).

Q5: What are the electrical operating thresholds and voltage tolerance characteristics governing the 1SDA073700R1?

A:
The 1SDA073700R1 operates within a nominal 220–240 V AC/DC control voltage range, with IEC-compliant undervoltage detection thresholds. The module continuously evaluates supply integrity and triggers trip action when voltage drops below the minimum operational holding level required for coil energization.

☞The reason is simple. We offer the best value on quality industrial equipment covered by industry leading buyer protection.The Sales Team is constantly scanning the web to ensure we are offering the lowest prices possible. ☞However, if you think we can do better, feel free to make an offer on any of our products. ☞We pride ourselves on saving you money! Here is how to make an offer. ☞The Offers Team does its best to respond to offers in a timely manner. ☞Typical turn-around time for an offer is 24 hours.

miya@mvme.cn (click) || 86-18020776792