The 300-line three-leg block overload relay includes features that provide positive motor
protection and added operator safety.
±10% adjustment: Relay trip points are factory calibrated for high accuracy. For added flexibility,
the trip current of the relay is adjustable ±10% to allow tuning the protection to any given motor
current and to eliminate nuisance tripping. A single calibration adjusts all three legs. The overload
relay is available in standard or ambient- compensated forms.

The CR324X solid-state overload relay provides added motor protection in critical
production processes where uptime is vital. It mounts directly to 300-line starters, and a
panel-mount version is also available for added application flexibility. Its advanced features can
save you time and money:
• Heaters are eliminated
• Phase loss protection prolongs motor life under adverse conditions
• Solid-state surface-mount technology increases reliability, offers excellent vibration resistance
and reduces heat generation
• Selectable 10/20/30 trip class offers flexibility for a range of applications
Accessories
Meet your special operating needs
ABB offers a large selection of accessories that allow you to extend the application
of your 300-line starters to match your operating needs.
Auxiliary contact kits deliver added versatility to magnetic starters
• Provide additional control circuits to energize accessory equipment, such as indicating lights
or to control sequencing of other motor starters
• Can be added to all across-the-line magnetic starters, reversing controllers and two-speed
controllers
• Each auxiliary contact rated at 10 amperes AC,continuous current (NEMA A600), and is suitable
for right or left side mounting
• Kits include either a basic contact block or an adder block supplied with a single or double circuit
Machine safety
The drives feature a built-in safe torque off (STO) function as standard which
disables the power semiconductors. As such, the drive cannot power the
motor making it torque-free. More safety functions, such as safe stop 1. safe
brake control, safely limited speed, safe speed monitor and safe direction, can
be implemented with external safety system options.
Benefits of using TIM foils in comparison to thermal grease are easier installa tion and more durable heat
transferring properties for longer periods of time. Durability par ticularly improved in a cyclic application.
The ABB FS450R12KE3/AGDR-71C is a robust and versatile automation controller designed to meet the
demanding requirements of the power industry, petrochemical sector, and general automation applications.
Known for its outstanding durability and performance metrics,
the FS450R12KE3/AGDR-71C stands out as a reliable solution for various industrial environments.
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