The BHG-SCL type microcomputer low-current system grounding selector is an intelligent selector device developed by our company. It is suitable for systems with neutral points not grounded or grounded through arc suppression coils or resistors (referred to as low-current grounding systems), capable of quickly and accurately locating single-phase grounding lines in low-current systems. Based on extensive user feedback, we have developed a new type of microcomputer low-current system grounding selector device using the 16-bit microcontroller MSP430F1611 as the data acquisition, logical judgment, and control center (CPU), with a liquid crystal display, signal lights, touch buttons, and a miniature printer as the human-machine interface, utilizing new technology and principles.

The device features simple operation, accurate line selection, and reliable performance. It can memorize instantaneous grounding information, differentiate between bus grounding and outgoing line grounding, and can also be configured with communication interfaces to transmit various fault messages to relevant departments, providing convenience for on-site operators.

1.1. Application Scope

A low-current grounding system suitable for various voltage levels and wiring methods.

1.2. Key Technical Features of the Equipment

1.2.1 The CPU utilizes the MSP430F1611 microcontroller, offering fast data collection, calculation, logic judgment, and control output with high precision. Equipped with dual "watchdog" circuits, it boasts strong anti-interference, self-checking, and self-recovery capabilities.

1.2.2 Equipped with a 128×64 graphic LCD display, Chinese menu prompts, offering rich and intuitive information display.

1.2.3 The miniature printer can promptly print and output grounding information.

1.2.4 Intelligent software technology, accurate line selection;

1.2.5 Simple and convenient debugging and maintenance through menu prompts and panel buttons.

1.2.6 Real-time display of the system clock and the RMS value of the bus voltage.

1.2.7 Memorable instantaneous grounding, distinguishing between busbar and outgoing line grounding.

1.2.8 Grounding information for memory, display, and printing includes the time of grounding and the grounding bus or grounding line.

1.2.9 Provides grounding alarm signals, allowing for timely notification to operating personnel.

1.2.10 Memory function included, stores information on the last 5 occurrences of failures; data is not lost after power failure.

1.2.11 Configurable grounding protection with automatic trip-out;

1.2.12 Configurable Communication Interface (RS232 or RS485).