Description
Product Parameters
- Model Number: HBS-803
- Manufacturer: Hyundai Electric
- Pole Configuration: 3-Pole (3P)
- Rated Current (In): 800A
- Rated Operational Voltage (Ue): 690V AC
- Rated Insulation Voltage (Ui): 1000V AC
- Interrupting Capacity (Icu): High-breaking performance (typically 50kA to 85kA at 415V, depending on specific sub-series)
- Frame Size: 800AF (Ampere Frame)
- Trip Unit Type: Thermal-Magnetic (Fixed or Adjustable depending on exact specification)
- Frequency: 50/60 Hz
- Compliance: IEC 60947-2, CE, and marine classification society standards
The Hyundai HBS-803 is a heavy-duty Molded Case Circuit Breaker (MCCB) engineered for the protection of electrical distribution systems and motors against overloads and short circuits. Built within a compact 800-ampere frame, this 3-pole breaker is widely utilized in industrial plants, high-rise buildings, and marine vessels due to its high breaking capacity, reliable mechanical endurance, and seamless integration into standard switchboard architectures.
Differences from Similar Models
The HBS-803 sits at a critical junction in the Hyundai Hi-Series lineup, with several features that distinguish it from surrounding models:
- Breaking Capacity: Compared to the standard HGM or HGP series, the “HBS” (High-Breaking) designation indicates a superior short-circuit interrupting rating, making it suitable for locations close to high-capacity transformers.
- Frame Efficiency: While the HBS-1003 covers 1000A requirements in a larger housing, the HBS-803 provides the maximum possible current density for the 800AF footprint, saving significant space in modular control panels.
- Mechanical Life: The 803 model features reinforced internal contacts and a specialized arc-extinguishing chamber that offers a higher number of mechanical operations compared to the more economical U-Series breakers.
- Accessories: Unlike smaller 250A or 400A breakers, the HBS-803 is designed with standardized internal slots for easy field installation of auxiliary switches, shunt trips, and undervoltage releases without disassembling the main casing.
Product Operation Tips
- Torque Specifications: When connecting busbars or large cables to the 800A terminals, always use a calibrated torque wrench. Loose connections at high currents lead to localized heating, which can cause nuisance tripping or “charring” of the molded case.
- Periodic Exercising: If the breaker remains in the “ON” position for extended periods (months or years), manually trip and reset the unit at least once a year. This ensures the mechanical linkage remains fluid and the grease hasn’t hardened.
- Dielectric Testing: If performing an insulation resistance test on the switchboard, ensure the breaker is in the “OFF” position. Applying high test voltages across the electronic trip unit (if equipped) or sensitive internal components can cause permanent damage.
- Terminal Shrouds: Always install the original terminal covers and phase barriers provided with the HBS-803. At 800A, the magnetic forces during a short circuit are immense, and these barriers are essential to prevent phase-to-phase arcing.
