Schweitzer Engineering Laboratories | SEL
New SEL-787L relay delivers economical and dependable line current differential protection. Product The SEL-TWFL locates faults using technology that is proven accurate to within a single tower span.
Products - Schweitzer Engineering Laboratories
The SEL-787 Relay is a versatile, two-winding current differential relay that protects industrial transformers. Monitor transformer health with cumulative through-fault current recording, and for the first time in the industry, automatically check and generate differential compensation settings with the Commissioning Assistant Software.
SEL-751 Feeder Protection Relay - Schweitzer Engineering …
The SEL-751 Feeder Protection Relay is ideal for directional overcurrent, fault location, arc-flash detection, and high-impedance fault detection applications.
2018年11月12日 · The SEL-700 series protective relays reliably protect and control your power system, from generators and transformers to lines, feeders, and motors. SEL relays offer high-speed, secure, accurate, and dependable fault locating
Schweitzer Engineering Laboratories - Wikipedia
Schweitzer Engineering Laboratories, Inc. (SEL) designs, manufactures, and supports products and services ranging from generator and transmission protection to distribution automation and control systems. Founded in 1982 by Edmund O. Schweitzer III, SEL shipped the world's first digital protective relay. [1]
2020年5月22日 · coverage. The SEL-751 Feeder Protection Relay offers combined light and high-speed overcurrent detection for arc-flash events. This combination provides the ideal solution for speed and security. Sensitive Earth Fault (SEF) Protection Improve ground protection with the 200 mA neutral input. You can protect ungrounded, solidly grounded,
2020年5月22日 · Replace external generator control and synchronizer relays with the built-in automatic synchronizer function. The SEL-700G automatically synchronizes the frequency, voltage, and phase control of the generator with the power system. Generator start reports and the PC-based synchroscope allow you to monitor the generator synchronization.
2021年12月3日 · SEL-321 Data Sheet Schweitzer Engineering Laboratories, Inc. 2 General Description The SEL-321 Relay protects, controls, and monitors EHV, HV, and subtransmission lines. The relay contains all protective elements and control logic to protect any overhead transmission line. The relay is a complete protective relay package for pilot and non-pilot ...
2018年6月7日 · the relay. Switch contacts and indicating lamps are separately wired to screw-terminal blocks on the rear of the relay, and they are functional even if the relay is out of service. The trip/close pushbuttons are equipped with the SafeLock system to prevent inadvertent operation and facilitate lockout/tagout procedures. Key Features
SEL-787 Transformer Protection Relay - Schweitzer …
The SEL-787 Transformer Protection Relay is a versatile, two-winding current differential relay that protects industrial transformers. Monitor transformer health with cumulative through-fault current recording, and for the first time in the industry, automatically check and generate differential compensation settings with the Commissioning ...