Key Features
Protection & Control
The 350 relay is a member of the 3 Series family of Multilin relays. This protective device is used to perform primary or back-up circuit protection on medium or high voltage feeders or transformers and down stream protection for utility and industrial switchgear. The 350 can be used for a wide variety of protection applications in power systems such as HV/MV or MV/LV transformer protection or capacitor bank protection. The basic protection provided by this relay includes multiple phase, ground, and neutral time and instantaneous overcurrent elements for coordination with upstream and downstream devices. Now it is enhanced with integrated arc flash detection functionality using light sensors supervised by over current to reduce incident energy and equipment damage. Additionally, the device provides essential feeder control features such as cold load pick up blocking, 2nd harmonic blocking, breaker failure, synchrocheck and autoreclose.
The robust 350 streamlines user work flow processes and simplifies engineering tasks such as configuration, wiring, testing, commissioning and maintenance.
Multilin 350 feeder protection relay functional block diagram
ANSI® Device Numbers & Functions
|
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Sixteen logic elements available for applications such as manual control, interlocking and peer to peer tripping. |
Key Features
Power System Troubleshooting
Analyze power system disturbances with transient fault recorder and event records
Metering, Monitoring & Diagnostics
Key Features
Advanced Communications
The 350 incorporates the latest communication technologies, making it the easiest and the most flexible feeder protection relay for use and integration into new and existing infrastructures. The 350 relay provides the user with one front USB and one rear RS485 communication port. Also available with the 350 is a rear communication port with Ethernet Fiber and Copper. For configurations requiring PRP and HSR redundancy protocols, the 350 provides two rear Fiber ports. Through the use of these ports, continuous monitoring and control from a remote computer, SCADA system or PLC is possible.
The 350 provides optional Parallel Redundancy Protocol (PRP) and High Availability Seamless Ring (HSR) according to the IEC 62439-3 standard that defines two protocols to increase network availability by reducing failover time to zero. Both ports are capable of simultaneously supporting the following protocols: Modbus TCP/ IP, IEC 61850, DNP3 or IEC 60870-5-104, IEEE 1588, SNTP and OPC-UA.
Link Loss Alert (LLA) function detects any issue with one port and switch to the other one in case of failure.
The 350 supports popular industry-leading standard protocols enabling easy, direct integration into electrical SCADA and HMI systems. The protocols supported by the 350 include:
Example of redundant HSR and PRP Architecture
EnerVista Software
The EnerVista suite is an industry leading set of software programs that simplifies every aspect of using the 350 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 350 set up software and are included to ensure proper protection and system. Learn More
Access Control
With the Security Audit Trail reporting feature, available in GE’s ViewPoint Monitoring software, operators are able to obtain Event logging reports of key activities such as configuration changes. These pre-formatted reports can be used to help ensure device and protection system integrity and perform forensic auditing of activities and changes for compliance.
Key Features
Hardware
Inputs and Outputs
The 350 features the following inputs and outputs for monitoring and control of typical feeder applications:
Drawout & Non-Drawout Construction
The 350 is offered in both a drawout or a nondrawout construction. In the drawout case design the 350 simplifies installation and improves site safety as the need to open switchgear doors or rewire the device after testing is eliminated.
The 350 protection relay chassis used with a draw out relay is available separately, for use as a partial replacement or in test environments. The draw out relay with no chassis is also available to order as a spare unit.
Application Flexibility & Ease of Wiring
Removable terminals ease wiring and in-system testing or troubleshooting.
|
User Interface
Retrofit Existing Multilin MII Family Devices
Traditionally, retrofitting or upgrading an existing relay has been a challenging and time consuming task often requiring re-engineering, panel modifications and re-wiring. Similar features and form factor of some models of MII family devices allow users to replace their existing relays with 3 Series relays with enhanced protection and control features and advanced communications.
The SR3 Enervista Setup software allows users to create new setting files based on existing MIFII and MIVII setting files and can be uploaded to a 350 relay with a compatible model number. Retrofit is smooth and simplified with minor wiring or switchgear modifications.