Eaton PKZM0-16-T Transformer Protection Circuit Breaker, 16 A, 3-Pole, 50 kA 088917

With a short-circuit breaking capacity of 50 kA at 400 V, the Eaton PKZM0-16-T delivers robust protection for transformer circuits, ensuring reliable interruption of high fault currents without compromising system integrity.

Overview

The Eaton PKZM0-16-T is a 3-pole motor-protective circuit breaker specifically engineered for transformer protection. It features a rated operational current of 16 A with an adjustable overload release range of 10–16 A, allowing precise adaptation to transformer load profiles. The thermomagnetic trip unit provides both thermal overload protection and instantaneous short-circuit release fixed at approximately 320 A (20 × Ie), ensuring fast response to fault conditions. Designed for DIN rail mounting (35 mm) or screw fixing, it integrates seamlessly into industrial control panels and distribution boards.

What stands out

• High breaking capacity: 50 kA at 400 V AC for superior short-circuit protection.
• Adjustable overload release: 10–16 A range for flexible transformer sizing.
• Phase failure sensitivity: Detects phase loss to prevent motor or transformer damage.
• Wide voltage range: Suitable for systems up to 690 V AC.
• Robust construction: IP20 terminals and IP00 housing for reliable operation in demanding environments.
• Standards compliance: Meets IEC/EN 60947-4-1 and VDE 0660, ensuring global acceptance.

Technical details

• Product type: Motor-protective circuit breaker (transformer protection).
• Rated current (Ie): 16 A.
• Overload release setting range: 10–16 A.
• Short-circuit release: Fixed, approx. 320 A (20 × Ie).
• Number of poles: 3.
• Rated operational voltage (Ue): Up to 690 V AC.
• Rated impulse withstand voltage (Uimp): 6 kV.
• Rated short-circuit breaking capacity (Icu) at 400 V: 50 kA.
• Mounting: DIN rail (35 mm) or screw fixing.
• Connection: Screw terminals.
• Degree of protection: IP20 (terminals), IP00 (housing).
• Standards: IEC/EN 60947-4-1, VDE 0660.
• Tripping characteristic: Thermomagnetic, transformer-specific.
• Ambient operating temperature: -25 to +55 °C.
• Auxiliary contacts: Not integrated (add-on modules available).
• Phase failure sensitivity: Yes.
• Terminal capacity: Solid 1×1–6 mm², stranded 1×1–6 mm², fine-stranded with ferrule 1×0.75–4 mm².

Our verdict

The Eaton PKZM0-16-T is a reliable and versatile protection device for transformer circuits, offering high breaking capacity, adjustable settings, and compliance with international standards. Its robust design and ease of installation make it a solid choice for industrial applications.