Eaton PKZM4-32 Motor Protection Circuit Breaker, 25-32 A, 3-Pole, 690 V AC, 50 kA 222353

The Eaton PKZM4-32 delivers a 50 kA short-circuit breaking capacity at 400 V, making it a robust choice for demanding motor protection tasks. This 3-pole motor protection circuit breaker offers a thermal-magnetic trip characteristic with an adjustable current setting range of 25 to 32 A, ensuring precise overload and short-circuit protection for motors up to 690 V AC.

Overview

Part of the PKZM4 family, this device is engineered for reliable protection of motors and installations. It features screw terminals for secure wiring and supports both DIN rail and screw mounting for flexible installation. The rated insulation voltage is 690 V, with an impulse withstand voltage of 6 kV, providing resilience in industrial environments.

What stands out

• Adjustable thermal overload release from 25 to 32 A
• Magnetic short-circuit trip fixed at 14 times the maximum setting (448 A)
• High breaking capacity of 50 kA at 400 V AC
• Compatible with side and front mounted auxiliary contacts for enhanced functionality
• Wide ambient operating temperature range from -25 to +55 °C

Technical details

• Rated current setting range: 25 - 32 A
• Number of poles: 3
• Rated operational voltage: up to 690 V AC
• Rated insulation voltage: 690 V
• Rated impulse withstand voltage: 6 kV
• Short-circuit breaking capacity at 400 V: 50 kA
• Instantaneous short-circuit trip setting: 14 x Iu (448 A at 32 A max setting)
• Tripping characteristic: Thermal-magnetic
• Overload release type: Thermal
• Short-circuit release type: Magnetic
• Mounting type: DIN rail / Screw mounting
• Connection type: Screw terminals
• Degree of protection: IP20 (terminals), IP00 (front)
• Ambient operating temperature: -25 to +55 °C
• Standard compliance: IEC/EN 60947-2, IEC/EN 60947-4-1
• Suitable for motor protection: Yes
• Auxiliary contact compatibility: Side and front mounted auxiliary contacts

Our verdict

The Eaton PKZM4-32 is a dependable motor protection circuit breaker that combines high breaking capacity with precise adjustment, making it suitable for a wide range of industrial motor control applications.