Eaton 0.4 → 0.63 A Motor Protection Circuit Breaker, 690 V ac

Modular Motor Protective Circuit Breakers designed for use with add-on contactor modules and accessories which provide isolation, short circuit and thermal protection. The units are DIN-rail mounting and part of the xStart family of control gear products, and a range of connection and wiring accessories are available to speed up assembly work and minimise wiring errors.,Various enclosure options are available, see PKZM Enclosures range.

Rated operating voltage 690Vac
Operating temperature range -25°C to +55°C
Temperature compensated range -5°C to +40°C
Adjustable current trip level, 0.6 – 1.0 x nominal rating
Short-circuit trip level (fixed) 14x nominal rating
Single-phase-failure sensitivity to IEC60947-4-1
Dimensions 195 x 45 x 77 (HxWxD) mm
Rotary switch operation with padlockable handle option, see accessories
On/Off/Tripped indication may be locked in the "off" position with handle

MPCBs are more critical now than ever. Most infrastructures now rely on a motor behind the scenes to power critical uninterruptible systems such as heating, ventilation and cooling. These systems are vital in ensuring business continues as usual, therefore must be protected against overcurrent's, thermal overloads and similar problems.

IEC (EN60) 947-1 general, 947-2 Circuit breakers, 1-4 switch disconnectors, 1-5 Motor starters, 1-6 Electrical equipment of machines

UL, CSA, LROS, GL

Reduce the chance of machinery downtime with this motor protection circuit breaker from Eaton. It prevents a motor from operating in abnormal conditions, so cuts down on the risk of damage caused by issues like overheating. If an overload or short circuit occurs, the device automatically disconnects the circuit without needing any manual intervention. The switching positions are clearly marked, so you'll always know if the device is on or off. Choose this breaker for commercial and industrial applications like the protection of motors used in fans, heaters and gearboxes.

• IP20 rated enclosure so it's protected against objects larger than 12mm and human touch
• Compact dimensions of 93 (H) x 45 (W) x 76mm (D) for maximum packing efficiency on a control panel
• Sensitive to phase failures for extra safety
• Includes a test function to ensure the device is working correctly for peace of mind

Current overloading is an unprogrammed scenario that occurs when a motor starts too frequently or when one of its three power phases is reduced. This causes a motor to overheat and draw a higher than normal nominal current.