LV External Circuit Breakers (ECB)
HS1 series circuit breakers are suitable for 50/60Hz AC systems with
insulation voltage up to 1000V, an operating voltage of AC 400V/230V, and a rated
current ranging from 125A to 400A. They provide integrated protection for both
power distribution and motors, with smart options such as the HS1E model that can
be installed inside meter boxes and interact with measurement systems, and the
HS1M model, designed for versatile applications.
Approved Specifications and Standards
IEC 60947 Standards
Complies with IEC 60947-1 and IEC 60947-2 standards for low voltage switchgear, ensuring global electrical safety and performance standards.
ASTM B633 – Zinc Coating
Follows ASTM B633 for zinc electroplating, providing corrosion resistance and long-lasting surface protection.
37-SDMS External Coating Specs
Adheres to 37-SDMS-01 and 37-SDMS-05 coating standards for electro-galvanized external switchgear and service communication systems.
Key Features
- Comprehensive protection against overload and short circuits with an isolation feature.
- Secure design with lock switch (anti-lock) and terminal cover with IP30 protection rating.
- High efficiency in thermal endurance up to 55°C, and voltage pulse endurance up to 8kV.
- Compact design free from arc spark thanks to AD Arc Drive technology.
- Easily adjustable by adding internal accessories.
Technical Features
The HS1 series circuit breakers are engineered with advanced safety, performance, and flexibility in mind. Designed to provide complete protection against overload and short circuits, they also feature a secure lock switch and IP30-rated terminal cover to ensure user safety. With high thermal endurance up to 55°C and voltage pulse resistance up to 8kV, these breakers deliver dependable performance in demanding environments. Their compact, arc-free design powered by AD Arc Drive technology, along with the ability to integrate internal accessories, makes them highly adaptable for a wide range of applications.
Safety & Protection
Performance & Flexibility
Tested for Demanding Environments
The HS1 series circuit breakers are engineered for reliable performance, offering comprehensive protection against overloads and short circuits. Designed with safety and adaptability in mind, they feature thermal endurance, arc-free switching technology, and are easily customizable with internal accessories—making them ideal for a wide range of low-voltage applications.
Altitude Compatibility
Enables automated control of the rotary switch for seamless remote or timed operations.
Earthquake & Wind Resistance
Resists earthquakes up to grade 8 and wind speeds of up to 35 meters per second.
Temperature & Humidity Tolerance
Operates smoothly between -10°C and 75°C with humidity levels up to 95%.
Safe for Sensitive Areas
Ideal for environments free from chemical hazards, explosions, and corrosive substances.
Basic Technical Specifications
Model & Configuration
The circuit breakers are available in two models—HS1M-250 and HS1E-400—designed to meet diverse operational needs. Both models feature a 3-pole (3P) configuration, offering reliable switching and protection for low-voltage systems.
Electrical Specifications
Engineered to support rated currents ranging from 125A to 400A, these breakers are compatible with standard AC systems operating at 400V/230V. This ensures flexibility for residential, commercial, and industrial applications.
Performance & Durability
Built for endurance, the breakers offer a mechanical lifespan of up to 20,000 cycles. With high short-circuit breaking capacity—25kA at 230V and 20kA at 400V—they provide robust protection under demanding conditions.
Uses and Applications
Residential & Commercial
Designed to ensure safe and efficient power distribution in residential complexes, office buildings, shopping centers, and other commercial properties.
Industrial Sector
Ideal for protecting industrial machinery and supporting safe, reliable operations in factories, plants, and manufacturing environments.
Energy Infrastructure
Supports intelligent metering systems and ensures stable performance across energy infrastructure networks like substations and switchboards.
Why HS1 breakers?
- Smart Remote Capabilities: Offers full remote control, monitoring, and diagnostics— including telemetry, remote signals, and automated re-closing.
- Comprehensive Protection: Built-in safeguards against phase faults, overload, ground faults, and voltage drops ensure system stability.
- High Durability & Safety: Made from high-quality Cycloaliphatic Epoxy Resin for water resistance, fire safety, and zero explosion risk.
- Compact & Maintenance-Free: Lightweight, long-lasting design that requires no maintenance—ideal for efficient, space-conscious installations.
