Dongfang Electronics Co., Ltd.

Business Type:Manufacturer

Main Products: Power GenerationPower DistributionPower TransmissionPower Consumption

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Over Current & Earth Fault Protection Relay（OCEF）

Electrical & Power Energy Electrical Controls

FOB Price:US$ 1,000.00 / Piece(s)

MOQ:50 Piece(s)

Payment Method : L/C T/T 

Keywords:OCEF  Protection Relay 

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Product Category: Electrical & Power Energy > Electrical Controls Trademark: DFE
Product Package: Specifications:
Place of Origin: China Port: Qingdao

Description              

The E0320J OC/EF PROTECTION RELAY is a numerical current protection relay which provides definite time overcurrent protection, inverse time overcurrent protection, thermal overload protection, negative sequence protection(unbalanced load protection), and also up to four-shot auto-reclosure functions, and a breaker failure protection. The device can measure phase current and zero sequence current. It can be used as primary protection for overhead lines, cables, motors and transformers in the high voltage radial distribution system, and also as back-up protection for line, transformer, generator, motor and busbar.

Function overview                                      

Protection functions          

l Time-overcurrent protection for phase and ground, definite-time overcurrent protection (50) / inverse-time overcurrent protection (51, IEC)

l Inrush restraint

l Cold load pick-up (dynamic setting change)

l Negative sequence protection/ unbalanced load protection (46) for recognition of asymmetrical Loadings and phase interruptions. Sensitive back-up protection for line protection

l Thermal overload protection (49) with preload measuring

l Reverse interlocking

l Breaker failure protection

l Auto-reclosure

Control functions            

l Commands for control of a  circuit-breaker

Operational measured values  

l  Currents

l  thermal model (49)

Event logs                   

l 250 event messages with time stamp

Fault logs                  

l 25 power system fault reports with time stamp

Oscillographic fault records   

l 8 oscillographic fault records are saved, even on loss of DC power

Monitoring functions         

l Hardware

l Software

l Trip circuit supervision

Communications            

l Series port (operated with the maintenance software, for connecting a PC)

l System interface (SCADA),RS485

-IEC 60870-5-103

l Time synchronization via PPS,PPM

Hardware                 

l Auxiliary voltages

24~60 V DC

110~220 V DC/AC

l 4 current transformers

l 8 binary inputs

l 6 output relays (five configurable relays and a life relay)

l 9 LEDs(1 RUN, 1 ERROR,1communication indication, 6 configurable dual-color LEDs )


Contact Name: Mr Pengfei Jiang Contact Email: ji****i@dongfang-china.com
Contact Job Title: Manager Contact Mob: 136***167
Contact Tel: +86-535-5520946 Contact Fax: +86-535-5520930
Address: No.:2 Jichang Road Zhifu Yantai City Shandong Province China Website: http://www.dongfang-china.com/en/

Dongfang Electronics Co.,Ltd.(hereafter referred to as DFE) is a hi-tech business group combining research and development, production and operation, technical services and system integration, one of the major suppliers of China' s energy management system solutions, and also the key hi-tech enterprise aided by the state and Shandong Province. In 1982, we developed the first microcomputer- based Remote Terminal Unit (RTU) in China through cooperation with Shandong Industrial University, which has made us involved in power system automation field. After development of more than five decades, Dongfang Electronics has owned 18 proprietary and investment enterprises including one listed company. Dongfang Electronics has boasted the technical center and the post- -doctoral scientific research station recognized by the state, participated in the international standard formulation of International Electro technical Commission (IEC) on behalf of China, and exported the technologies and services to South America, South-east Asia, Middle East, Europe,etc. Today, Dongfang Electronics has regarded "Cherish environment, Treasure resource" as a vision to incorporate environmental protection, energy saving, safety and intelligence into business flow and to provide customers with energy system solution. By focusing on smart grid, internet of things(IOT), environmental protection and energy saving, Dongfang Electronics has provided the intelligent automation control products and solutions in terms of power generation, power transmission, power transformation, power distribution and power utilization, and has made great achievements in the research and application of Radio Frequency Identification (RFID) technology, and high/low- -voltage frequency converters, and thereby has made significant contributions to the generalization and application ofinternet of things, energy saving and consumption reduction.

Contact Exhibitor

Dongfang Electronics Co., Ltd.

Contact:Pengfei Jiang

Email:ji****i@dongfang-china.com

Country:China

Address:No.:2 Jichang Road Zhifu Yantai City Shandong Province China

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