NDW50 Function selection table of microcomputer integrated protection device

Applications

This series of digital protection units is suitable for small current/small resistance grounding systems up to and including 10kV, providing protection, control and monitoring functions for transmission lines and main equipment such as transformers, capacitors and motors.The programmable design idea of loading and unloading components was used to meet the requirements of various applications flexibly.Through the standard fieldbus interface, it supports multiple nodes to work together and realizes system-level management and integrated information sharing, which is the ideal basic equipment for transformer and distribution automation system.

Applications

• High performance digital signal processor (DSP) is adopted to provide powerful computing and processing capability.The circuit design is fine and clean, equipped with industrial-grade components to ensure the stable operation of the device. 
• Unique component level - engineering level - user level three level programming mode, component types can be set on site. 
• High speed and high precision AC signal cocoon measurement, sampling frequency up to 1600Hz.Multiple AC signal FFT calculations are performed in milliseconds.The sampling value has digital correction, and can suppress noise and migration effectively. 
• Powerful vectorization method for obtaining multiple derived AC signal characteristics. 
• Able to record 20 events in a row, complete event record of protection actions with time of failure, type and peak. 
• Using a graphical LCD display, graphics, ICONS and all Chinese language display. 
• The main signal loop is equipped with emi absorption elements, which can work in harsh electromagnetic environments. 
• Enhanced MODBUS communication interface, in addition to normal data, can also transmit real-time waveform, vector data, etc. 
• Complete self-check function, including setting parameters, recording, operating loop, current and other abnormal monitoring. 
• Panel embedded and wall-mounted structural design, fully enclosed thin metal chassis.Small size, light weight, simple installation, suitable for distributed installation in compact space switch panel, distribution box and other occasions. 
• The product has excellent anti-interference performance and conforms to EC60255-22-4 fast transient interference level IV standard.
Iec 60255-22-2 Class IV standard for electrostatic discharge. 
• Surface coating process. All devices were made of mature products from well-known enterprises at home and abroad, and the average loading time was guaranteed to be more than 100,000 hours.

NDW50-PB Transformer protection device

Applications
The device is suitable for protection of voltage rating below 10KV.

Main features

• Use a high performance digital number processor (DSP). 
• Unique component level - engineering level - using the level three-stage programming mode, component type can be set on the spot. 
• Powerful vectorization methods. 
• Able to record 20 events in a row. 
• Adopt graphic LCD screen, display in Chinese. 
• Fully enclosed thin metal case.Small size and light weight. 
• Watch paste process, all devices are used in the mature products of well-known enterprises at home and abroad. 

Device Functional Configuration
• Three-stage overcurrent protection. 
• Zero sequence current protection. 
• Anti - time protection. 
• Negative sequence overcurrent protection. 
• heavy gas
• overtemperature

Communicate functions
• RS485 communication

For other models and specifications, please contact our customer service staff.