Industrial 211L3 Field Loss Relay Coil Assembly

Description:

The No Name 211L3 Coil is a replacement electromagnetic coil designed for use with a field loss relay in DC motor control and protection systems. Commonly installed in DC shunt motors, compound wound motors, and adjustable speed drive systems requiring protection against loss of field excitation. Maintenance teams, OEMs, and industrial electricians use this coil to restore field loss relay operation and protect motors from overspeed conditions caused by an open field circuit. Field loss relays disconnect the motor armature when field current is lost, preventing equipment damage and unsafe operating conditions.

Applications:

The No Name 211L3 Coil is designed to energize a field loss relay used in DC motor control systems. It is commonly used in DC drives, cranes, rolling mills, printing presses, hoists, and industrial machinery employing shunt or compound wound DC motors. When connected in series with the motor field circuit, the relay coil monitors field current and trips the control circuit if excitation is lost, protecting the motor and driven equipment from overspeed and mechanical failure.

Technical Specifications:

• Manufacturer: Unknown
• Manufacturer Part Number (MPN): 211L3
• Product Type: Electromagnetic Coil for Field Loss Relay
• Compatible Device: Field Loss Relay / Field Failure Relay
• Function: Field Current Monitoring and Relay Actuation
• Application: DC Motor Protection
• Motor Types: DC Shunt Wound and Compound Wound Motors
• Coil Construction: Encapsulated Electromagnetic Coil
• Duty Cycle: Continuous Duty
• Installation: Internal Relay Coil Replacement
• Protection Function: Prevents Overspeed Due to Field Loss
• Compatible Systems: DC Drives and Motor Control Systems
• Mounting: Relay Internal Assembly
• Product Status: OEM / Legacy Replacement Component
• Application Environment: Industrial motor control and protection systems

Common Replacements:

• OEM 211L3 Coil
• Field Failure Relay Coil Assembly
• Compatible DC Field Loss Relay Coil