Q-Class DC Circuit Breaker for Nuclear Power Plant

Product catalog summary

Introduction
The Q-Class DC Circuit Breaker (ETNB) is designed for use in nuclear power plants to protect DC power system equipment such as generators, motor pumps, and batteries. It employs an air breaking method with a manual closing mechanism and is enclosed in an insulation frame. The breaker meets the IEEE std C37.14 standard and has been tested for quality at CESI in Italy and KERI in Korea.

Specifications
The ETNB model E1600-Q has a maximum voltage of DC 300V and a rated voltage of DC 250V. It supports a rated current of 1600A and a frame current of 800/1600A. The breaker is designed with 2 poles and operates with a manual closing and manual/OCR tripping mechanism. It uses air as the interruption medium and features a digital over-current relay (OCR) for enhanced protection.

Features and Safety
The ETNB is compact, allowing installation in limited spaces, and includes a manual closing mechanism. It has undergone various tests, including earthquake and BOM-related tests, to ensure reliability. Safety features include interlocks between the open mechanism and safety locking, ensuring the breaker is withdrawable only when in an open status.

Operation and Control
The circuit breaker features a digital OCR for precise operation, offering overcurrent protection with short-delay, long-delay, and instantaneous settings. Fault events are recorded for analysis, and data can be downloaded via RS232 and controlled remotely via RS485. The breaker includes a convenient withdrawing mechanism and safety locking devices.

Technical Data
The digital OCR operates with a control voltage of DC 70~350V and a power consumption of 8.4W. It provides accurate tripping with long time delay, short time delay, and instantaneous trip settings. The OCR records fault current waves and allows remote data control and transfer.

Additional Products
Entec offers other products such as DC switchgear, substation rectifiers, and DC MCC cubicles with varying rated voltages and capacities.

Catalog excerpts

Q-Class DC Circuit Breaker for Nuclear Power Plant-1

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

Open the catalog to page 1

Q-Class DC Circuit Breaker for Nuclear Power Plant-2

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 Material)...

Open the catalog to page 2

Q-Class DC Circuit Breaker for Nuclear Power Plant-3

Safe & Reliable Nuclear Power Plant

Open the catalog to page 3

Q-Class DC Circuit Breaker for Nuclear Power Plant-4

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 manual...

Open the catalog to page 4

Q-Class DC Circuit Breaker for Nuclear Power Plant-5

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

Open the catalog to page 5

Q-Class DC Circuit Breaker for Nuclear Power Plant-6

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 data...

Open the catalog to page 6

Q-Class DC Circuit Breaker for Nuclear Power Plant-7

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

Open the catalog to page 7

Q-Class DC Circuit Breaker for Nuclear Power Plant-8

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 : [email protected]

Open the catalog to page 8

Q-Class DC Circuit Breaker for Nuclear Power Plant

Q-Class DC Circuit Breaker for Nuclear Power Plant

Catalog excerpts

All ENTEC ELECTRIC & ELECTRONIC CO.,LTD catalogs and technical brochures