MCB auxiliary alarm contact
MCB auxiliary alarm contact

MCB auxiliary alarm contact

The MCB auxiliary alarm contact is a compact accessory designed to be mounted alongside a miniature circuit breaker, providing clear indication when the breaker trips due to a fault such as overload or short circuit. It operates through a mechanical linkage with the MCB, ensuring that any trip event is immediately translated into an electrical signal for external devices like indicator lights, alarms, or control systems. This makes it an essential component for applications requiring quick fault identification and remote monitoring.
  • Product Description
  • Specifications
  • Product Features
  • More Details

Product Description

Built with a reliable changeover contact mechanism (typically 1NO + 1NC), the auxiliary alarm contact ensures stable and accurate signaling under various operating conditions. Its modular design allows for easy installation without additional wiring complexity, while maintaining compatibility with a wide range of MCB models. Commonly used in distribution panels, industrial control systems, and building automation setups, it enhances system safety and efficiency by enabling faster response to electrical faults.

Specifications

Use classes Ue(V) Ie(A) Number of contacts
AC-12 230 2 2 groups of transfer contacts
AC-15 230 1
DC-12 110 0.5

The circuit breaker has the following accessories
Circuit breaker + auxiliary contact; circuit breaker + auxiliary alarm contact; circuit breaker +shunt trip;
circuit breaker + shunt trip + auxiliary contact; circuit breaker + shunt trip + auxiliary alarm contact;      circuit breaker + undervoltage trip.

 

Product Features

Installation and Use

1. This series of circuit breaker accessories are specially designed for use in conjnction with DAB7 (63 frame) circuit breakers and are not intended to be used alone.

2. The four accessories are installed on the left side of DAB7-63 miniature circuit breakers, the DAB7-OF, DAB7-FB, DAB7-QY are fixed with screws, the DAB7-FL is fixed to both sides with tape, and at the same time can be installed with the guide rail.

3. The mechanical connection between the circuit breaker and DAB7-, DAB7- FB, DAB7- FL, DAB7-QY transmission shaft should be flexible and compatible with the rest of the equipment.

4. After DAB7-QY circuit breaker has been installed, it can only be closed when press the test button. And installer should shut off the circuit breaker and release the test button immediately, thus ensure the installation safely and correctly. Besides, the rated voltage should pass through the undervoltage trip at same time.

Videos

YouTube video