Overview
The Westinghouse EHB3020L is a thermal-magnetic molded case circuit breaker designed for three-phase industrial and commercial applications. This 20-ampere, 3-pole unit is rated for 480VAC operation and delivers the dependable overcurrent protection that industrial control engineers expect from Westinghouse EHB series breakers. The model integrates long-time and instantaneous trip functions for comprehensive circuit protection.
Key Features
- 20-Ampere Contact Rating: Rated at 40°C ambient with fixed thermal-magnetic trip mechanism.
- 3-Pole, 3-Phase Configuration: Suitable for three-phase power distribution and motor protection circuits.
- Molded Case Design: Sturdy, compact form factor compatible with standard bolt-on mounting in Westinghouse panelboards.
- Thermal-Magnetic Trip: Non-interchangeable trip unit provides both long-time overload and instantaneous short-circuit protection.
- Standard Interrupting Rating: 14 kiloampere (kA) @ 480VAC; 18 kA @ 240VAC for reliable fault clearing.
Technical Specifications
- Voltage Rating: 480VAC, 50/60Hz
- Amperage: 20 Amperes
- Poles: 3 Pole, 3 Phase
- Trip Type: Thermal-Magnetic (Fixed, Non-interchangeable)
- Interrupting Rating (AIC): 14 kA @ 480VAC; 18 kA @ 240VAC
- Frame Style: EHB
- Mounting: Bolt-On
- Terminal Configuration: Line and Load End Terminals (Standard)
- Trip Functions: Long-Time (LI) and Instantaneous
Typical Applications
- Three-phase power distribution in industrial control panels
- Motor starting and overload protection circuits
- Legacy Westinghouse switchboard and panelboard retrofits
- Commercial facility branch protection at 480VAC
- Equipment protection in manufacturing and process automation systems
Compatibility & Replacements
Compatible With
- Westinghouse EHB-series panelboards and switchboards
- AB De-Ion family electrical distribution systems
- Standard 480VAC three-phase power systems
- UL Listed electrical enclosures and control cabinets
Replaces / Drop-In Replacement For
- Westinghouse EHB3020 (non-suffixed variant)
- Westinghouse EHB3020L direct equivalent
- Legacy Eaton EHB3020 units (Eaton acquired Westinghouse electrical distribution in 1994)
Works With
- Westinghouse bolt-on panelboard mounting rails
- Standard DIN rail and busbar systems rated 480VAC
- Industrial automation control systems requiring 3-phase motor protection
- Manual and automatic transfer switches rated for 480VAC service
