ABB SK-11 Signal contact 1NO+1NC

ABB SK-11 Signal contact 1NO+1NC

Product Overview

ABB SK-11 Signal contact 1NO is an auxiliary contact that plays an important role in electrical systems. Its "1NO" designation clearly indicates its characteristic of having one normally open contact, which makes it play a key role in circuit signal transmission and status indication, especially in devices such as motor starters.

Brand background

ABB, as a leading enterprise in the global power and automation technology field, has a history of more than 130 years and has profound technical accumulation and excellent innovation capabilities in the research and development, production, and other aspects of electrical equipment. Its products are renowned for their high quality and reliability, and are widely used in various fields such as energy, industry, transportation, and infrastructure, providing efficient and sustainable solutions for global customers. SK-11 Signal contact 1NO is a high-quality product launched by ABB with its strong technical strength and precise grasp of market demand.

Specification parameters

Electrical performance

Rated working voltage: Supports AC 400V or DC 250V, compatible with various voltage levels of electrical systems to ensure stable operation.

Rated working current: It exhibits different values under different AC voltages, with 3A at 24V AC, 2A at 240V AC, and 0.5A at 380/400V AC, demonstrating good voltage and current adaptability.

Rated impulse withstand voltage: up to 6kV, can effectively resist surges and momentary overvoltage impacts in electrical systems, ensuring stable operation of equipment.

Rated insulation voltage: up to 690V, excellent insulation performance to avoid faults such as leakage and short circuit, ensuring the safety of personnel and equipment.

Physical characteristics

Size specifications: The overall compact size is 9mm × 86mm × 72mm, suitable for installation in electrical control cabinets and motor starters with limited space, optimizing the internal layout of the equipment.

Weight: Only 0.03kg, lightweight design for easy installation and maintenance operations.

Protection level: IP20 protection level, can protect solid foreign objects with a diameter greater than 12.5mm from entering and prevent accidental contact with internal live parts by humans, suitable for general indoor electrical environments.

Core function: mainly used for signal transmission and status indication. In the field of automation control such as motor control systems, normally open contacts are in a disconnected state when no control signal is received. When a control signal is received, the contacts quickly close, achieving circuit conduction and completing signal transmission for motor start, stop, and other states, assisting the system in real-time monitoring of equipment operation.

Working principle: Based on the principle of electromagnetic induction, when an external control signal acts on the SK-11 Signal contact 1NO, electromagnetic force is generated, causing the contact to overcome the resistance in the initial normally open state, achieve closure, and thus connect the circuit, allowing current to pass through; When the control signal disappears, the electromagnetic force disappears, and the contact returns to the normally open disconnected state under its own elastic force, cutting off the circuit.

Key advantages

High reliability: Thanks to ABB's exquisite manufacturing technology and strict quality control, it can operate stably in complex electrical environments for a long time, reducing the probability of failure.

Good adaptability: With multiple electrical parameter specifications, it can be widely applied to electrical systems of different voltage and current levels, with a wide range of applicability.

Compact design: The compact size and lightweight weight not only save installation space, but also facilitate operation, improving equipment integration and maintenance convenience.

matters needing attention:

During installation, it is necessary to strictly follow the electrical installation specifications to ensure that the wiring is secure and avoid false connections that may cause poor contact, heat generation, or even electrical accidents.

The usage environment should meet its protection level requirements and avoid using in harsh environments such as high humidity and dust to prevent affecting insulation performance and contact life.

Regularly inspect and maintain the product, check for wear, corrosion, and other issues with the contacts, replace faulty components in a timely manner, and ensure the normal operation of the equipment.

Similar model supplement: For example, some ABB products have a configuration of 1NO+1NC (1 normally open contact and 1 normally closed contact). Compared to the SK-11 with only 1NO, this type of product is more suitable for multiple logic controls of the circuit's on/off status at the same time, and can meet more complex electrical control requirements.

Application scenarios

Motor control system: During the process of starting and stopping the motor, the motor status signal is transmitted to other parts of the control system, such as indicator lights that can visually display the motor operating status, making it convenient for operators to monitor; At the same time, it provides logical judgment basis for the controller and works in conjunction with contactors, relays, etc. to ensure stable operation of the motor.