GE Multilin 169PLUS-120N-125VDC motor management relay

GE Multilin 169PLUS-120N-125VDC is a highly configurable motor management relay from General Electric’s Multilin series, designed specifically for three-phase medium motors with protection, control, and monitoring functions. The following is a detailed introduction to the product:

1、 Product Features
Highly configurable: This relay comes with basic set points programmed for large motor systems, which users can further adjust according to their actual needs to achieve personalized configuration.
Rich ports and functions: Provides a wide range of ports to diversify and customize the functionality of relays, including auxiliary relay contacts, RTD (resistance temperature detector) sensor connections, analog output terminals, etc.
Auxiliary relay contacts: Provide additional normally open/normally closed (NO/NC) connections that operate independently of other contacts. Relays can be configured as non fault safe or fault safe, as well as lockout or non latch, suitable for active alarm or trip functions, and can trigger non motor equipment.
RTD sensor connection: Users can connect up to 6 resistance temperature detectors to monitor stator motor temperature, historical hottest temperature, and ambient air temperature. The relay utilizes this data to arrange the optimal cooling process, ensuring that the motor operates at the appropriate temperature.
Analog output terminals: These two terminals can be configured using the relay’s set value system and connected to chart recorders, remote instruments, programmable recorders, and/or computer loads to achieve remote monitoring and recording of data.
Emergency restart terminal: This connection type can cover system trips and force motor restarts, increasing the overall versatility of the system and providing additional protection during motor component operation.

2、 Technical specifications
Control power supply: 125V DC
RTD Input: Supports multiple RTD sensor connections, the specific number may vary depending on the model and configuration, but typically includes 6 stator RTDs and additional RTDS inputs.
Relay contacts: It has four sets of relay contacts (NO/NC), providing more connection options compared to the two sets of relay contacts of the 169 model.
Installation method: Install through the four mounting holes on the installation panel. The relay includes four mounting screws (10-32 x 3/8 inch) and four washers.
Shielding design: Adopting an internal shielding design to reduce interference or noise pickup experienced by the relay during operation.
3、 Application scenarios
The GE Multilin 169PLUS-120N-125VDC motor management relay is suitable for motor protection and control applications that require high reliability and flexibility, such as industrial automation, energy management, water treatment, and other fields.