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Plant B 2*600MW Unit Desulfurization ECMS Project Datang Linqing 2x350MW Combined Heat and Power ECMS Project in Liaocheng, Shandong Province Industry-University-Research Cooperation on Wind, Solar, Energy Storage and EV Charger in Hunan Province Multi-Energy Complementation System Project of Huazhong University of Science and Technology in Wuhan, Hubei Province "Internet+" Intelligent Energy Demonstration Project of Qianhai & Shekou Power Supply Beijing and Yanqing Venue Project of 2022 China Winter Olympics Micro-grid Demonstration Project in Cuoqin County, Tibet Samxon 2MW/5MWh Distributed Energy Storage Power Station Project in Dongguan "Internet+" Intelligent Energy Demonstration Project of Qianhai & Shekou Power Supply Honghu and Guantang Energy Storage Power Station Projects in Huaian, Jiangsu Province Blackout Start Energy Storage Project of Guangzhou GCL Lantian Gas Thermal Power Co., Ltd. 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Jiangsu Huai'an Conch Cement 3MW Energy Storage Project Chengda Energy Storage Project in Changshu, Suzhou, Jiangsu Energy Storage Sub-project of Meicun Microgrid Project in Wuxi, Jiangsu Province Shenzhen Minle Parking Shed PV Microgrid Energy Storage Project of Potevio New Energy Co., Ltd. Columbia 117kWp PREMEX rooftop PV project 47.7kW Putian microgrid in Shenzhen 26MW-52MWh FuRong ESS project 115kV digital substation in Nongki, Thailand ——The 1st full functional IEC 61850 digital substation in Thailand 220kV Liucheng modular substation in Ningde, Fujian ——The 1st 220kV modular substation in Fujian province, China Electric vehicle charging station EPC project in Dongshen Road, Changsha Distribution automation of Songzao coal and electricity company in Chongqing
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PRS-789 Auxiliary Relay

Overview/Introduction/Application Technical Features/Advantages Technical Specifications/Sub-models Related Solutions

PRS-789 Auxiliary Relay

Product Description

PRS-789-H serial auxiliary relay mostly cooperates with main protection relay to achieve trip circuit supervision, from the positive supply to the negative supply whilst the circuit breaker is open or close status, and as well trip &close activation with self-adaption trip &close coil current, or lockout relay with bi-stable function.

Scope of Application

PRS-789-H serial auxiliary relay mostly cooperates with main protection relay to achieve trip circuit supervision, from the positive supply to the negative supply whilst the circuit breaker is open or close status, and as well trip &close activation with self-adaption trip &close coil current, or lockout relay with bi-stable function.

PRS-789-HA 海外操作箱斜视图.png

Technical Features/Advantages

解决方案.png

The design, quality and rugged construction of the relay make it suitable for applications requiring high levels of reliability and dependability. The high IP degree guarantees reliable operation over a wide temperature range, even under extreme environmental conditions. The relay has been tested in accordance with IEC, IEEE standards.

Specifications/Submodels

Type Function Application
PRS-789-HA Three Phase Trip circuit supervision mostly use for Three-Phase operation circuit breaker with one trip coil and one close coil
PRS-789-HB Single Phase trip circuit supervision mostly use for Single-Phase (3 Segregated Phase) operation circuit breaker
PRS-789-HC Trip relay &close relay with self-latching function mostly use for current operation circuit breaker
PRS-789-HD Lockout relay, repeat relay, high burden trip contact mostly use for lock-out close circuit after CB trip and initiating trip circuit
PRS-789-HE Bi-stable relay, AC voltage switching relay Mostly use forsignal selection or switching control
PRS-789-HF Self-Reset repeat tripping relay with single input Used for relaying protection device to repeat tripping with single input
PRS-789-HG Self-Reset repeat tripping relay with double inputs Used for relaying protection device to repeat tripping with double input

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