MV/LV
Circuit Breaker

  • Diverse Lineup

    Powerful product group in construction, industrial, nuclear, shipyard, etc.

  • User-centered Design

    High-tech custom design for easy installation and maintenance

  • Securing Credibility

    Reinforcing stability based on cutting-edge technology and R&D


HD Hyundai Electric has a diverse product family of Low/Medium Voltage circuit breakers, from MCCBs for use in homes to ACBs and VCBs for industrial plants. Our high-quality products safely protect your electrical equipment. In addition, we have been tested by internationally accredited testing laboratories such as DEKRA, KERI and CESI to ensure flexibility, safety, and reliability.

  • Molded Case Circuit Breaker(MCCB)
  • Earth Leakage Circuit Breaker(ELCB)
  • Magnetic Switch(MS)
  • Air Circuit Breaker(ACB)
  • Vacuum Circuit Breaker(VCB)
  • Miniature Circuit Breaker(MCB)
  • Residual Current Circuit Breaker(RCCB)
  • Motor Protection Relay
  • Digital Protection Relay
  • Digital Power Meter

Product Specifications


  • Molded Case Circuit Breaker(MCCB)

    Features

    Maximized selectivity with a wide product range

    Enhanced safety with higher breaking capacity

    Adjustable ratings applicable for all types

    Specifications

    15A ~ 1600A, 5kA ~ 150kA

    Ui = 1000V, Ics = 100% Icu

    Adjustable ratings applicable for all types

    For detailed specifications and more information, please refer toour catalog and contact your local representative.

  • Earth Leakage Circuit Breaker(ELCB)

    Features

    Greater precision earth leakage protection enhances equipment safety

    Compatible size and internal parts with MCCB

    Adjust earth leakage residual current and operating time

    Depending on the location of the facility, industrial/residential earth leakage circuit breaker classification additional safety secured

    Specifications

    15 A ~ 800 A, 2.5 kA ~ 85 kA

    Ics = 100% Icu

    Adjustable rated residual operating current: 100 - 300 - 500 - 1000 (mA)

    Time-delay type Limiting non-actuating time: 0 - 0.2s - 0.5s - 1s

    For detailed specifications and more information, please refer to our catalog and contact your local representative.

  • Magnetic Switch(MS)

    Features

    Provides motor protection solution applicable for various industrial systems with enhanced durability and insulation performance

    Decreased installing space by upper arrayed structure of Auxiliary Contacts

    Auxiliary Relay with reduced power consumption type

    Direct mounting structure for Thermal Overload Relay(~100 A)

    Specifications

    9 ~ 800A(8 frames)

    Rated Insulation voltage : 1000V(50A ~ )

    AC/DC free voltage(115A ~ )

    For detailed specifications and more information, please refer to our catalog and contact your local representative.

  • Air Circuit Breaker(ACB)

    Features

    Maximum breaking capacity: 150ka(6300 A at 500V)

    Easy maintenance by attaching draw-in/out body

    Advanced protection trip relay(OCR) and various accessories

    Bus bar terminal horizontal/vertical changeable

    Provides old type customized retrofit ACB replacement solution

    Specifications

    HGS 1600/3200 2 types AF

    HGN 2000/4000/5000/6300 4 types AF

    For detailed specifications and more information, please refer to our catalog and contact your local representative.

  • Vacuum Circuit Breaker(VCB)

    Features

    High voltage system protection solution with various models and enhanced convenience

    Various control power and mounting type

    Certified the highest level of the latest standard(IEC 62271-100)

    Rated short time 4 seconds

    Convenient maintenance: VI wear condition can be visually checked.

    Specifications

    7.2/12/17.5kV, up to 50kA, up to 4000A

    24kV, up to 40kA, up to 3150A

    36kV, up to 40kA, up to 3150A

    For detailed specifications and more information, please refer to our catalog and contact your local representative.

  • Miniature Circuit Breaker(MCB)

    Features

    Easy din-rail attachment type

    Compact design, dual terminals, common use of options

    Specifications

    Rated breaking capacity 6/10kA

    Rated current 1~100A, instantaneous operating characteristics B, C, D

    Various accessories AUX, ALT, SHT, UVT, SHT, PLD

    For detailed specifications and more information, please refer to our catalog and contact your local representative.

  • Residual Current Circuit Breaker(RCCB)

    Features

    Compact design, dual terminals, dual status display

    Specifications

    Rated residual current 10/30/100/300/500mA

    Frame 63/100AF, Short-circuit breaking capacity 6kA

    For detailed specifications and more information, please refer to our catalog and contact your local representative.

  • Motor Protection Relay

    Features

    Various motor protection elements, overload reserve alarm, real-time load factor display

    Fault history storage and inquiry, cumulative operation time display

    32-bit ARM Core mcu-based real-time data processing

    Specifications

    Leakage type, instantaneous type, communication type

    For detailed specifications and more information, please refer to our catalog and contact your local representative.

  • Digital Protection Relay

    Features

    Protection and measurement function: Feeder/Incoming/Motor/TR/Renewable

    Voltage/current vector diagram display

    Product size optimization and weight reduction

    EMC shielding and heat dissipation structure

    Specifications

    Grounded and ungrounded, renewable, transformer protection function

    Measurement function Voltage, current, power, wattage, power factor, frequency, harmonics, demand

    For detailed specifications and more information, please refer to our catalog and contact your local representative.

  • Digital Power Meter

    Features

    Measurement accuracy IEC62053 satisfied products

    Various measurements such as current, phase voltage, line voltage, etc.

    RS485 MULTI-DROP communication with MODBUS-RTU Protocol

    Supports connection check, Demand Control, Remote ACB ON/OFF function

    Specifications

    Measurement function, voltage, current, power, wattage, power factor, frequency, harmonics, demand

    For detailed specifications and more information, please refer to our catalog and contact your local representative.

Standards and Certification


  • IEC60076
  • ANSI C57.12.00
  • CSA-C88-M90
  • AS2374
  • DIN
  • BS
  • NEMA-TR1
  • GOST
  • JEC2200
  • KS

Gallery


  • HG Series Lineup

  • HG-HGP250X

  • HGM Series 125(ZCT)

  • HGE Series 125R

  • ACB

  • HG Series HGV TYPE VCB

  • HGD100S 2P, 3P

  • HRC100S 2P, 4P

  • HGMP TYPE Motor Protection Relay