JR3663 3-Phase Thermal Overload Relay Key benefits - Protects 3-phase motors and control circuits from overload and overheating - Provides automatic protection to help reduce electrical faults and unplanned downtime - Includes 1 normally open (NO) and 1 normally closed (NC) contact for flexible control and signaling - Current range of 20-32 A covers mid-range motor loads - Designed for control relay applications in panels and switchgear - Simple integration with existing control circuits through standard wiring What it does - Detects overload conditions in 3-phase circuits and interrupts the protected path to prevent damage - The NO and NC auxiliary contacts offer versatile signaling and interlock options for PLCs, alarms, or machine safety circuits - Keeps equipment running safely by providing reliable overload protection for motor-driven systems Key specifications - Model: JR3663 - Type: 3-phase thermal overload relay - Contacts: 1 normally open (NO), 1 normally closed (NC) - Current range: 20-32 A - Application: control relay applications, motor protection, circuit protection in 3-phase systems Compatibility and performance - Suitable for use in control relay circuits within 3-phase motor applications - Compact form factor designed for mounting in control panels and switchgear - Robust protection for electrical circuits against overload while enabling straightforward control signaling Use scenarios - Scenario 1: 3-phase motor in a packaging line - The JR3663 protects the motor from overloads in the drive line - The NC contact can be used to cut off the motor circuit if an overload is detected, while the NO contact can drive an indicator or PLC input for status monitoring - Scenario 2: Conveyor system drive - Protects the conveyor motor from overheating during high-load startup or jam conditions - Use the NO contact to signal an alert and the NC contact to stop the drive circuit safely - Scenario 3: Air handling or pump motor in an industrial process - Provides reliable overload protection for a 3-phase fan or pump - Auxiliary contacts enable interlocks with safety relays or control logic to ensure safe shutdown This description remains consistent with the JR3663 model specifications and its function as a 3-phase thermal overload relay with one NO and one NC contact, designed for control relay applications and motor protection in 20-32 A circuits.