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Multilin 3 Series
Intuitive industrial and utility protective relays for feeders, motors and transformers
3 Series photo

The 3 Series family of protection relays are functional and economical protection solutions for feeders, motors and transformers. By providing protection, control, monitoring and metering, and both local and remote user interfaces in one assembly, the 3 Series family effectively eliminates the need for expensive discrete components. The 3 Series family provide extensive diagnostic information allowing users to troubleshoot and minimize downtime. The SR 3 Series streamlines work flow processes and simplifies engineering tasks such as configuration, wiring, testing, commissioning, and maintenance.

Key Benefits
  • Easy to use and cost effective
  • Effortless draw-out construction
  • Environmental monitoring system to alarm on destructive operating conditions
  • Easy to use interface and set up in one step
  • Accelerated Life Cycle tested to ensure reliability under abnormal conditions
  • Advanced diagnostics to increase reliability
  • Large backlit display with 40 characters
  • Flexible communications with multiple ports & protocols to allow seamless integration
  • Easy access to information via multiple communication network options
  • Powerful Security Audit Trail
  • Applications    

    monitoring & meteringcommunicationssoftware & security

      Key Features    
  • 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
  •   monitoring & metering

    Preventative Maintenance:
    The 3 Series allows users to track relay exposure to extreme environmental conditions by monitoring and alarming at high temperatures. This data allows user to proactively schedule regular maintenance work and upgrade activities.

    Failure Alarm
    The 3 Series detects and alarms on communication port and IRIG-B failures. The 3 Series also enables users to analyze system performance via diagnostics information such as event records, oscillography, etc.

    Statistical Data
    The 3 Series 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 3 Series 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

      Key Features
  • 4 X20 character LCD display
  • Control panel with up to 12 LED indicator
  • Front USB and rear serial, Ethernet and Fiber ports
  • Multiple protocols - IEC 61850, ModBus™ RTU, ModBus™ TCP/IP, DNP 3.0, IEC60870-5-104, IEC60870-5-103
    advanced communications
    Easy integration into new or existing infrastructure
    With several Ethernet and serial port options, and a variety of communication protocols, the 3 Series provides advanced and flexible communication selections for new and existing applications.

    The 3 Series supports various industry standard protocols such as, IEC 61850, Modbus RTU, Modbus TCP/IP, DNP3.0, IEC 60870-5-103 and IEC 60870-5-104 providing simplified and easy integration into new and existing applications.

    Drawout Construction
    The 3 Series offers a complete drawout feature eliminating the need for rewiring after testing has been concluded. With our advanced draw-out construction, the 3 series can be drawn-out without having to disconnect any communication cables. e.g. fiber, copper, RJ45, etc and helps retain communication status even after a relay has been withdrawn from its case.
    advanced drawout construction

    The 3 Series’s advanced draw-out construction allows removal without disconnecting rear communications cables.
    front panel
      front panel display

    A 4 line liquid crystal display (LCD) allows visibility under
    varied lighting conditions. When the keypad and display
    are not being used, system information is displayed by
    scrolling through a maximum of 30 user-defined default
    messages. These default messages appear only after a
    user-defined period of inactivity. The metering summary
    page is displayed to show original metered values.
    EnerVista software
    The EnerVista suite is an industry leading set of software programs that simplifies every aspect of using a 3 Series 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 set up software and are included to ensure proper protection and system operation. Learn More
    EnerVista software screens
    security - enabling NERC CIP compliance
    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 control factor that can lock or unlock a device for configuration changes and other modifications.
    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.
    auditing and reporting