Multilin 3 Series Intuitive industrial and utility protective relays for feeders, motors and transformers
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.
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
Oscillography with 32 samples per cycle and digital states
IRIG-B clock synchronization
Motor health diagnostics
Security audit trail
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
4 X20 character LCD display
Control panel with up to 12 LED indicator
Front USB and rear serial, Ethernet and Fiber ports
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.
The 3 Series’s advanced draw-out construction allows removal without disconnecting rear communications cables.
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.
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
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.
Protection & Control 
