GE 339 MOTOR PROTECTION SYSTEM

GE 339 MOTOR PROTECTION SYSTEM

Overview 

The 339 relay is a member of the 3 Series  family of Multilin relays. This motor  protective device is used to perform  primary motor protection of medium  voltage motor applications.  The basic protection functions of this  relay include motor thermal model, timedelayed and instantaneous overcurrent,  ground overcurrent and sensitive ground  overcurrent protection. Additional control  features such as logic control are available  for applications that require additional  motor control functionality.

The robust 339 streamlines user work flow  processes and simplifies engineering tasks  such as configuration, wiring, testing,  commissioning, and maintenance. This  cost-effective relay also offers enhanced  features such as diagnostics, preventative  maintenance, motor health reports and  advanced security features.

KEY BENEFITS

• Enhanced Thermal Model including RTD and current  unbalance biasing providing complete motor protection 

• Detailed Motor Health Report providing critical motor data simplifying motor analysis 

• Increase process uptime by trouble shooting problems faster with  time stamped event reports, waveform capture, motor start and  motor trending 

• Increase security and reduce potential system risks with the  Security Audit Trail capturing setting and command changes 

• Powerful communication capabilities allowing seamless  integration into most communication architectures

• Easy access to information via multiple communication network  options including USB, Serial, Fiber & copper Ethernet 

• Eliminate FT switches, needed for testing with the unique drawout construction 

• Reduced wiring with support for remote RTD’s 

• Reduce setup and configuration time with the Simplified Motor  Setup screen 

• Customized motor overload curve using Flex curves  

• Draw out and non draw out options available

APPLICATIONS

• Small to Medium sized Medium Voltage AC Motors  

• Protection of pumps, conveyors, fans, compressors, etc.

• Applications requiring fast and secure communications 

• Harsh environments requiring protection against corrosive  chemicals and humid environments

FEATURES

Protection and Control 

• Thermal model biased with RTD and negative sequence current  feedback  

• Phase and ground TOC and IOC 

• Start supervision and inhibit 

• Mechanical Jam 

• Current Unbalance 

• Overvoltage 

• Undervoltage 

• Under/Over Frequency 

• Voltage Phase Reversal 

• Acceleration Time 

• Undercurrent / Underpower 

• Starts per Hour

Metering & Monitoring 

• Current Metering 

• RTD Temperature 

• Voltage Metering 

• Power & Energy Metering 

• Frequency Metering 

• Event Recorder: 256 events with 1ms time stamping 

• Oscillography with 32 samples per cycle and digital states 

• IRIG-B clock synchronization 

• Motor health diagnostics 

• Security audit trail