DC Switchgear

• Product- ETSR 21: Light railway substation- ETSR 22: Metro substation
• DC High Speed Circuit Breaker and DC Disconnector are built-in- KERI, CESI Type Test Certification- High Reliability and Safety- Absolute current interruption (0 ~ rated interruption capacity kA)- Excellent interruption of Mid ~ Small current(0 ~ 3000A)
• Compact design- Advanced device PMA technology applied- Compact small size Disconnector application- Full use of Cubicle space
• Digital Protection Relay System Application- Digital type main protection relay use(50F, 76D, 85, 45, 80)- Precise operation and reliability- Metering information , Recording function   Fault event: 1000 events   Fault event: 1000 events   Fault wave: 16 waves(0.2~6000ms)   Load current storing(Time load: 42days, Daily load: 3 yrs)- Protocol communication   DNP3.0, MODBUS etc.
• Absolute Insulation capability- Inner Insulation treatment, Arc mis-operation possibility exception- Live High Voltage Line work possible
• Convenient Circuit Breaker withdraw- No need to have separate withdraw device - Convenient Push-In/Pull Out structure
• Other Interlock- Complete Interlock establishment between Circuit Breaker, Disconnector, Relay and Panel

  Model

ETRG 21

ETRG 22

  Nominal Voltage

DC 750V

DC 1500V

  Rated Voltage

DC 900V

DC 1800V

  Insulation Voltage

DC 1800V

DC 2300V

  Rated Interrupting over voltage

1.5~2 X rated voltage

  Rated Current

1000/2000/3000/4000/5000A

1000/2000/3000/4000/5000A

  Making current capacity

71KA

  Operation Duty

O-15sec.-CO-15sec.-CO-60sec.-COO-10sec.-CO

  Mechanical durability

20,000 times

  Power frequency withstand voltage(60Hz, 1min.)

5.5kv

6.6kv

  Rated operation voltage

DC 110V

  Over current Release Pick-up

3~10 Ka

  Max. Ambient Temp. /avg. Temp.

40°C/35°C

  Installation altitude

≤ 2000m

  Size [mm]

Height (standard)

2200

Length (standard)

1800

Width (standard)

600

  Weight[kg]

650

700

  IP protection(IEC 529)

IP 31

  Applied Standard

IEC 61992,JEC 7152 etc.