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.

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

350 Feeder Protection

345 Transformer Protection

339 Motor Protection

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.