Designed for medium voltage motors in industrial applications, the 339 delivers unparalleled protection,
control, diagnostics and communications in an industry leading draw-out construction. Providing simplified
setup configuration through the use of the Motor Settings Auto-Configurator, advanced graphical diagnostics
with the Motor Health Report and support for multiple communication protocols including IEC 61850, the
339 Motor Protection System provides unparalleled motor protection for most small and medium sized AC
motors.
Enhanced Thermal Model including RTD and current unbalance biasing
Time stamped event reports, waveform capture, motor start and motor trending
Security Audit Trail capturing setting and command changes
Powerful communication capabilities including USB, Serial, Fiber & copper Ethernet
Draw-out construction eliminates the need for FT test switches
Reduced wiring with support for remote RTD’s using the RMIO module
Simplified Motor Setup screen reduces setup and configuration time
Customized motor overload curve Flex curves
Detailed Motor Health Report with critical data
Small to Medium sized Medium Voltage AC Motors
Protection of pumps, conveyors, fans, compressors, etc.
Harsh environments requiring protection against corrosive chemicals and humid environments
Applications requiring fast and secure communications
Thermal model biased with RTD and negative sequence current feedback
Under Voltage
Over Voltage
Under/Over Frequency
Phase and ground TOC and IOC
Start supervision and inhibit
Mechanical Jam
Current Phase Reversal
Acceleration Time
Undercurrent / Underpower
Starts per Hour
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, time-delayed 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 advance security features.
Current, Voltage, Power, Frequency
Current Metering
RTD Temperature
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
Analyze power system disturbances with transient fault recorder and event records
Preventative Maintenance:
The 339 allows user to track relay exposure to extreme environmental conditions by monitoring and alarming at high temperatures.
Failure Alarm
The 339 detects and alarms on communication port and IRIG-B failures. The 339 also enables users to analyze system performance via diagnostics information such as event records, oscillography, etc.
Statistical Data
The 339 records statistical data in order to assist in diagnosing common motor faults, as well as assisting in planning preventative maintenance.
Advanced Device Health Diagnostics
The 339 performs comprehensive device health diagnostic tests during startup and continuously at runtime to test its own major functions and critical hardware. These diagnostic tests monitor for conditions that could impact and present device status via SCADA communications and front panel display.
Providing complete detailed graphical diagnostic information is a first in the industry.The 339 provides the motor diagnostic information in a legible easy to use format that enables the user to make informed decision on the health of their motor.
Easy integration into new or existing infrastructure. With several ethernet and serial port options, and a variety of protocols, the 350 provides advanced and flexible communication selections for new and existing energy management, SCADA, and DCS systems.
The 339 utilizes the most advanced communication technologies today making it the easiest and most flexible motor protection relay to use and integrate into new and existing infrastructures. Multiple communication ports and protocols allow control and easy access to information from the 339. All communication ports are capable of communicating simultaneously. With our advanced draw-out construction, the 3339 relay can be drawn-out without having to disconnect any communication cables.
The 339 supports the most popular industry standard protocols enabling easy, direct integration into electrical SCADA and HMI systems. Modbus RTU is provided as standard with a RS485 networking port. The following optional protocols are available:
IEC 61850
DNP 3.0
Modbus RTU
Modbus TCP/IP
IEC 60870-5-103
IEC 60870-5-104
These protocols make it easy to connect to a Utility or Industrial automation system,
eliminating the need for external protocol converter devices.
The Enervista suite is an industry leading set of software programs that simplifies every aspect of using the 339 relay. The Enervista suite provides all the tools to monitor the status of the protected asset, maintain the relay, and integrate the information measured into DCS or SCADA monitoring systems. Convenient COMTRADE and sequence of event viewers are an integral part of the 339 set up software and are included to ensure proper protection and system operation. Learn More
Access Control
Multilin devices and relays are designed with simple but powerful security to enable reliability and compliance for virtually any project or implementation. With support for multi-level permissions and multi-factor supervisory controls, Multilin devices can help you manage the integrity of your system during commissioning, testing, implementation, and beyond.
The 3 Series family provides separate authentication for settings and commands to the system. In addition, as discrete authentications for local and remote access, it also provides a supervisory control factor that can lock or unlock a device for configuration changes and other modifications.
Intrusion Detection
Multilin’s family of protection and control products can also help enable your security perimeter and intrusion detection programs. By providing essential alarming and logging of critical events, Multilin devices can help you detect potential breaches within your system and allow you to respond quickly and effectively. Specifically, unsuccessful access attempts are logged, alarmed, and lead to potential attackers being locked out. This ensures the reliability of your system during questionable activity.
Auditing and Reporting
With the Security Audit Trail reporting feature and support for Event logging of key activities such
as configuration changes, Multilin devices can help ensure device and protection system integrity,
and perform forensic auditing of activities and changes for compliance.
Protection & Control 
