ABB SPAD 346 C Differential relay

ABB SPAD 346 C Differential relay

DESCRIPTION

ABB SPAD 346 C differential relay is a power protection device with comprehensive functions, stable performance and flexible configuration. It can effectively protect the safe operation of power equipment and systems, and improve the stability and reliability of power systems.

Main functions

Winding short-circuit and turn-to-turn fault protection: Provides winding short-circuit and turn-to-turn fault protection for double-winding transformers and generator-transformer installations, ensuring that the equipment can be switched off in time to prevent damage in the event of a fault.

Earth fault protection: Provides earth fault protection for transformer windings on the HV and LV sides according to the required principles, including the principle of stabilising differential currents, the principle of high impedance, the principle of calculating or measuring residual currents or the principle of neutral current.

Overcurrent protection: provide three levels of overcurrent protection for power transformers and generators, as well as two levels of backup earth fault protection, to ensure that timely measures can be taken in case of abnormal current to protect equipment safety.

Product features

Integrated design: integrates three-phase differential relay, overcurrent relay and ground fault relay, realising the integration of multiple protection functions and simplifying equipment configuration and installation.

High reliability: short operation time, stable operation even in the case of partial saturation of the current transformer. Precise correction is achieved through digital settings, improving the accuracy and reliability of the protection.

Harmonic suppression: Blocking according to the ratio of the second harmonic and fundamental components of the differential current prevents unnecessary action during transformer inrush current. At the same time, blocking based on the ratio of the fifth harmonic to the fundamental component of the differential current prevents unwanted operation in the event of transformer overexcitation.

Flexible configuration: features five programmable external control inputs for displaying and relaying alarm and trip signals from gas relays, oil temperature sensors and other transformer auxiliary equipment sensors. In addition, four tripping and four signalling relay outputs are provided to facilitate user configuration according to actual requirements.

Strong anti-interference ability: integrated interference recorder function, which can record current and digital signals. At the same time, it has high anti-electrical and electromagnetic interference ability and can operate stably in harsh industrial environments.

Applications

ABB SPAD 346 C differential relay is suitable for various power systems, such as substations, power plants, distribution systems, etc.. It can provide reliable protection and guarantee for the safe operation of power equipment and systems and ensure the stable operation of power systems. In addition, the relay can also be used for the protection of three-winding power transformers, provided that 75% of the short-circuit power of the power transformer is supplied from the same direction.

Precautions for use

Before use, please read the product manual and installation guide carefully to ensure correct installation and configuration.

During use, please take care to keep the working environment clean and dry, and avoid water, oil and other liquids from entering the inside of the relay.

Regularly check the working status of the relay, if any abnormality is found, please contact professional personnel for repair or replacement.

Application Functions

Multi-functional control: The module can perform a variety of control functions, including logic control, motion control, temperature control, etc., to meet the needs of different application scenarios.

Digital control: Provides digital control functions, allowing users to programmatically define and execute control logic to achieve precise control of complex industrial processes.

Communication Capability: Supports a variety of digital communication protocols, such as Ethernet, Profibus, Modbus, etc., in order to communicate with other devices, monitoring systems, or upper level control systems, and to achieve centralised management and monitoring of all parts of the system.

PLC Integration: Compatible and able to be integrated into ABB or other manufacturers' PLC systems to achieve seamless integration and overall synergy with other automation equipment and control systems.