Controllo e HMI Littelfuse

The SE-325 Neutral-Grounding-Resistor Monitor is designed for use in resistance-grounded systems operating at voltages up to 25 kV. This device plays a critical role in monitoring the integrity of the neutral-to-ground path by measuring the current and voltage at the transformer or generator neutral-to-ground connection. Furthermore, it assesses the continuity of the neutral-grounding resistor (NGR).By coordinating these essential measurements, the SE-325 can effectively identify various issues, including loose connections, corrosion, ground faults, or failures in the NGR. In response to such conditions, it is equipped to provide a single alarm or trip output contact. The device is approved by CSA and operates at a supply voltage of 240 VAC, making it suitable for a range of industrial applications.

The SE-330 is designed for comprehensive monitoring of neutral-grounding resistor systems, ensuring compliance with Rule 10-302 of the 2018 Canadian Electrical Code Part I. This relay continuously measures neutral current, neutral-to-ground voltage, and neutral-to-ground resistance, providing crucial oversight of the neutral-to-ground path.An intact neutral-grounding resistor (NGR) is essential for proper ground-fault protection; any interruption can lead to a false sense of system integrity. Specifically, if the NGR is open, the ground-fault protection may become inoperative, while a shorted NGR could result in abnormally high ground-fault current levels.Suitable for use with both low- and medium-voltage transformers and generators with varying resistance grounding, the SE-330 serves applications across various industries, including processing, manufacturing, chemical, pulp and paper, petroleum, and water treatment facilities. For high-voltage requirements, the SE-330HV is recommended, and for compliance with Australian standard AS/NZS 2081.3:2002, the SE-330AU variant is available.

The SE-330HV-25-01 serves as an essential monitoring relay for ground-fault and neutral-grounding resistors. This device continually measures critical parameters such as neutral current, neutral-to-ground voltage, and neutral-to-ground resistance. Its primary function is to ensure that the neutral-grounding resistor (NGR) remains intact, which is vital for maintaining operational safety. If the NGR is open, it compromises the ground-fault protection system, potentially leading to erroneous assumptions about system integrity. Suitable for both low- and medium-voltage transformers and generators, the SE-330HV-25-01 can be utilized in a variety of sectors including processing, manufacturing, chemical, pulp and paper, petroleum, and water treatment facilities. For high-voltage applications, this model is specifically designed to meet those demands. It conforms to multiple standards, including approvals from CSA, UL, CE, and C-Tick, ensuring reliability across various installations. The device features an analog output current range of 4-20 mA and offers communication options via USB and dual SC Fiber Ethernet. With dimensions measuring 8.4 inches in height, 3.9 inches in width, and 5.8 inches in depth, the SE-330HV-25-01 is designed to fit compactly within control systems.

The SE-330HV-20-01 serves as a vital monitoring relay for ground-fault and neutral-grounding-resistor applications. It continuously assesses the neutral-to-ground path ensuring that the neutral-grounding resistor (NGR) remains intact, which is essential for maintaining effective current-sensing ground-fault protection. An open NGR could lead to system malfunctions, giving a false impression of operational safety.This model is compatible with both low- and medium-voltage transformers and generators, accommodating various grounding configurations across multiple industries, including manufacturing, chemical processing, and water treatment. For applications demanding compliance with the Australian standard AS/NZS 2081.3:2002, the SE-330AU variant is available. The SE-330HV is particularly suited for high-voltage requirements.Technical specifications include an analog output current range of 4-20 mA, with relay contacts available in multiple forms: one Form A, one Form B, and two Form C. It operates on a supply voltage ranging from 28-52 VAC and 36-72 VDC. Communication is facilitated via USB, and the relay contact operating mode is configurable between fail-safe and non-fail-safe. The dimensions of the unit are 8.4 inches in height, 3.9 inches in width, and 5.8 inches in depth.

The SE-330HV Series functions as a sophisticated monitoring relay that assesses the integrity of the neutral-to-ground path. It continuously evaluates neutral current, neutral-to-ground voltage, and neutral-to-ground resistance to ensure the neutral-grounding resistor (NGR) remains intact. An open NGR compromises ground-fault protection, potentially leading to incorrect assessments of system functionality.This relay is suitable for use with both low- and medium-voltage transformers and generators, accommodating low- or high-resistance grounding in various applications, including processing, manufacturing, chemical production, pulp and paper, petroleum, and water treatment facilities. For high-voltage applications, the SE-330HV is recommended. Additionally, for compliance with Australian standard AS/NZS 2081.3:2002, the SE-330AU variant is available.With dimensions of 8.4H x 3.9W x 5.8D, the device provides a range of specifications that include an analog output current of 4-20 mA, relay contacts with one Form A, one Form B, and two Form C configurations, and a supply voltage range of 65-265 VAC and 85-275 VDC. It also features USB communication and has received multiple approvals including CSA, UL, CE, and C-Tick.

L'unità di rilevamento dell'arco D0920 è un dispositivo di sicurezza ad alta velocità e cruciale, progettato per il rilevamento rapido dei guasti dell'arco elettrico nei sistemi di distribuzione dell'energia elettrica. È progettato per supportare fino a tre sensori di punto (A0220), che sono tipicamente montati all'interno di un quadro elettrico per monitorare gli eventi di arco elettrico. L'unità richiede un'alimentazione a 230 V c.a. per il funzionamento.