American SEL relay commissioning and installation method

Brand: SEL/USA

Delivery Time: Over one month

Application Areas: Environmental Protection, Chemical Industry, Petroleum, Mining, Energy

SEL (USA) microcontrollers are composed of highly integrated, bus-less microcontrollers, high-precision current and voltage transformers, high-insulation-strength intermediate relays, and high-reliability switching power supply modules. These microprocessor-based protection devices are primarily used in power plants, substations, and distribution stations with voltage levels of 110KV and below. They can also be used for voltage and current protection and control in systems with voltage levels between 70V and 220V.

Advantages of SEL (USA) Microprocessor-based Protection Devices:

Product Features: Ultra-thin design, powerful functions, excellent craftsmanship, beautiful appearance, and high cost-effectiveness. Nanjing Dongzi microprocessor-based protection devices feature high integration, complete protection configuration, strong anti-interference ability, low power consumption, and resistance to harsh environments. They are particularly suitable for installation in KYN-28 medium-voltage switchgear, ring network switchgear, and various prefabricated substations, and can also be installed in centralized panel configurations.

Features of the American SEL relay microprocessor protection device:

In addition to the advantages of microprocessor protection mentioned above, the American SEL relay microprocessor protection device has the following characteristics compared with similar products:

(1) Complete range of products: The microprocessor protection device has a particularly complete range of products, which can meet the various protection requirements of various equipment in various types of substations, which greatly facilitates the design of substations and computer networking.

(2) The hardware uses chips that improve technical precision. The CPU uses an 80C196KB chip, the measurement is a 14-bit A/D conversion, and there are up to 24 analog input circuits. The acquired data is processed by a DSP signal processing chip, and high-speed Fourier transform is used to obtain the fundamental to the 8th harmonic. Special software automatic correction ensures high measurement accuracy. Using dual-port RAM and CPU to convert data constitutes a multi-CPU system, and communication uses a CAN bus. It has the characteristics of high communication speed (up to 100MHz, generally operating at 80 or 60MHz) and strong anti-interference ability. On-site observation and setting of various protection modes and protection parameters can be easily performed through the keyboard and LCD display unit. (3) The hardware design employs special isolation and anti-interference measures in the power supply, analog inputs, digital inputs and outputs, and communication interfaces, resulting in strong anti-interference capabilities. Besides centralized panel mounting, it can be directly installed on switchgear.

(4) The software boasts rich functions. In addition to various measurement and protection functions, it can perform fault recording (1-second high-speed fault recording and 9-second dynamic fault recording), harmonic analysis, and low-current grounding line selection functions by cooperating with a host computer.

(5) It can use RS232 and CAN communication methods, supports multiple remote control transmission protocols, and facilitates networking with various computer management systems.

(6) It adopts a wide-temperature-range background 240×128 large-screen LCD display, which is easy to operate and provides a beautiful display.

(7) It features high integration, small size, and light weight, facilitating centralized panel mounting and decentralized installation on switchgear. SEL Relay Microprocessor Protection (SEL551, SEL351A, SEL587, SEL751A, SEL)

Overview of SEL Relay Microprocessor Protection (SEL):

Featured Applications

Monitor Transformer Life Trajectory: Transformers utilize the IEEE C57.91 Life Loss-1995 thermal model for various winding configurations (including three single-phase transformers). Direct measurement of ambient and maximum oil temperature using a resistance temperature detector (RTD) or thermocouple (TC) input card. Monitor both digital and analog sensor outputs, such as oil level and pressure.

Enhanced System Awareness: In addition to basic metering such as voltage and current measurements, the SEL-2414 provides metrics such as maximum/minimum metering, demand and peak demand, and energy data. Thermal model reports allow you to accurately trend transformer loads and correlate data with other system parameters. Use instrumentation data to better manage your assets and plan for future development.

Manage and Protect Critical Assets: Manage and protect critical substation assets and integrate transformer thermal through-fault monitoring. Assertion alarms are based on transformer thermal conditions or other monitored conditions.

Transformer and fan control-control loads utilize transformer coolers (LTCs) in a wide variety of applications, from distribution transformers to large autotransformers (references). Furthermore, cooling transformer fans eliminate maintenance surprises under critical load conditions. Fan banks are controlled separately to balance cooling duty cycles and increase the life of the cooling system. The LTC and fan control design template is implemented using the AcSELerator Hedge SEL-5030 software.

The company primarily deals in European and American brands and can source brands from any European country. For example, key German brands include: BURKERT, DEMAG, HAWE, REXROTH, HYDAC, PILZ relays, FESTO, IFM sensors, E+H, HEIDENHAIN, P+F sensors, SICK, TURCK, and HIRSCHMANN industrial switches. German brands: Hengstler, Murr, Schmersal, Samson, EPRO (Emerson Group)

American brands: MOOG, ASCO, MAC, NUMATICS, PARKER, VICKERS, ROSS

British brands: Norgren

Italian brands: OMAL, ATOS, CAMOZZI, UNIVER, Camozzi