Q-Class DC Circuit Breaker for Nuclear Power Plant
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ENhanced TEChnology www.entecene.co.kr Q-Class DC Circuit Breaker for Nuclear Power Plant Version 1.0

Q-Class DC Circuit Breaker ETNB is DC Circuit Breaker used at Nuclear Power Plant to protect DC power system equipments such as Generator, Motor pump and Battery, etc. ETNB which adopts air breaking method, uses manual closing mechanism enveloped with Insulation Frame. It is designed to meet the main standard code IEEE std C37.14 Quality of ETNB is confirmed at CESI(Centro Eletrotecnico Sperimentale Italiano) in Italy and KERI(Korea Electrotechnology Research Institute) in Republic of Korea by passing Q-Class Type Test, short-circuit test, load break test, Earthquake test and BOM(Bill Of...

Safe & Reliable Nuclear Power Plant

Construction ETNB is designed to be installed in limited space and optimization made it possible to be fit in compact cubicle. Front-side Over-view Arcing chamber Digital OCR Manual closing lever Body fixing device Status Indicator Name Plate Operation counter Draw Button Trip & Draw Button Drawer(fixed) Withdraw handle Padlock device Position Indicator Characteristics High Reliable Interrupting operation Type test performance at International laboratory, CESI(Centro Electrotecnico Sperimentale Italiano) and KERI(Korea Electrotechnology, Research Institute). Compact circuit breaker with...

Control Terminal Upper Terminal Lower Terminal Earth Terminal Trip Operation by digital OCR Precisely operated digital OCR Overcurrent protection[Short-delay, Long-deiay, Instantaneous) • Fault event recording - Fault Cycle record - Operation event record - RS 232 Port data download(Option) • Remote operation function(Option) • Simply setting change Convenient withdrawing of circuit breaker Safety locking and trip interlocking device combined, no additional withdrawing mechanism necessary for circuit breaker draw In/Out

Digital OCR operates CB tripping in precise time against a fault current. Long time delay trip, short time delay trip and instantaneous trip are more accurate compared with old mechanical OCR so that it provides more safe and reliable operation in power distribution line. Digital OCR uses Shunt built-in circuit breakerto check load current and fault current. OCR relay has several convenient facilities. Fault current waves are recorded upto 16 osc. which are captured by Digital OCR and through RS232 port, the fault information can be downloaded. And locally as well as through RS485 port, OCR...

06 / 07 ETDR-101 Line Diagram DC 125V/250V Main BUS(P) ETDR101 Left Pole Power DI/DO Shunt MPU LOAD Analog Input TC Right Pole DC 125V/250V Main BUS(N) ETDR-101 TC Characteristics Curve Current Multiples of Long Time Pick-Up HMI

Main products DC Switchgear Rated voltage : DC 900/1800[V] Rated current : 3000/4000[A] Substation Rectifier Rated voltage : DC 750/1500[V] Rated capacity: 3000/4000[kW] DC MCC Cubicle Rated voltage : DC 125/250[V] Rated current : 800/1600[A] * Note. Product structure and arrangement shall be modified without notice 78-2 BUNCHEON-RI BONGDAM-EUP HWASEONG-CITY GYUNGGI-DO KOREA TEL: +82-31-227-1161 FAX : +82-31-227-1164 http://www.entecene.co.kr E-mail : entec@entecene.co.kr