By monitoring zero-sequence current and zero-sequence voltage, we detect ground faults and overcurrent incidents that occur within the consumer's premises.
Generally, at the boundary point of safety responsibility for high-voltage consumers, it is stipulated that an SOG-type high-voltage automatic branch circuit breaker be installed to prevent accidents occurring within the high-voltage consumer's premises from affecting the distribution lines. This device is used in combination with the SOG-type high-voltage automatic branch circuit breaker to detect ground faults and overcurrent incidents occurring within the consumer's premises by monitoring zero-sequence current and zero-sequence voltage.
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basic information
■□■Features■□■ ■Ground Fault Detection Operation When a ground fault incident is detected, the direction of the ground fault is determined. If it is judged to be on the inside of the facility, the circuit breaker will be opened by the trip output (GR operation). ■Overcurrent Detection Operation When an overcurrent incident is detected within the facility, after the power side of the high-voltage circuit is de-energized, the circuit breaker will be opened by the overcurrent accumulation trip output (SO operation). ■Ground Fault Operation Setting The setting of the ground fault operation current and the setting of the ground fault operation time can be configured. ■Abnormal Detection Function The internal circuits of the device perform self-diagnosis regularly, and if an abnormality is detected, the trip output is prohibited. Similarly, if a trip coil disconnection of the circuit breaker is detected, the trip output is also prohibited. ■For more details, please contact us.
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Company information
Our company was founded in 1949 as a designated manufacturer of wire materials for the Ministry of Telecommunications. We have steadily established our presence by designing and manufacturing telephone and communication systems and related equipment for public enterprises such as police, railways, electricity, and broadcasting, alongside the development of related companies. We also have a significant track record in OEM products for major manufacturers. Our main products are custom-made items, which we handle from design to manufacturing, focusing on systems and products related to information and communication. Recent key products include disaster prevention information systems (JR East and JR Hokkaido), command telephone systems (various JR companies, electricity companies, and private broadcasters), remote monitoring and control systems (various JR companies, electricity companies, and telecommunications carriers), and emergency contact systems (private elementary and middle schools). Currently, we are working on the development of the latest IT and IP systems, such as serverless IP conference call systems, to adapt to the evolution of communication networks. If you present us with challenges in niche areas where major manufacturers are not proficient, we are committed to responding with low prices and short delivery times by leveraging the experience we have accumulated over many years and the latest technology. We appreciate your guidance and encouragement.
