The Schneider Electric EZD400M 3P 320A is a 3-pole, 320A, M-frame molded case circuit breaker (MCCB) from the EZD series. This cost-effective and compact device provides reliable overload and short-circuit protection for three-phase power distribution circuits in commercial and industrial applications. The "M" frame size (400A maximum) with a 320A trip unit setting offers a balance of performance and economy for feeder protection.
Specifications
Parameter Specification
Product Series EZD Series (Compact MCCB)
Model / Frame Size EZD400M
Number of Poles 3 Poles (3P)
Rated Operational Current (In) 320 Amperes
Frame Current (Iu max) 400 A (Maximum rating for M frame)
Trip Unit Type Fixed Thermal-Magnetic (TM-D) or Electronic (E) based on configuration. "320A" typically indicates a fixed thermal-magnetic rating or the setting of an electronic unit.
Breaking Capacity (Icu @ 400V AC) 50 kA / 65 kA (Depends on specific catalog code - e.g., standard or high-breaking version)
Rated Operational Voltage (Ue) 400/415 V AC (50/60 Hz)
Rated Insulation Voltage (Ui) 800 V AC
Short-Time Withstand Current (Icw) Typically 15-25 kA for 1s
Connection Front connection (screw terminals)
Terminals Suitable for copper/aluminum cables (up to 185 mm² typical)
Mounting Fixed mounting (panel or DIN rail adapter)
Width (3P) Approximately 105 mm
Standards IEC/EN 60947-2, CCC, CE, RoHS
Operating Temperature -25°C to +70°C
Mechanical Life 20,000 operations
Electrical Life 8,500 operations at rated current