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Multilin T35
Transformer Protection System

The T35 is designed to provide basic transformer protection functions for variety of transformer applications. It uses multiple current inputs to provide primary protection and backup protection of transformers, including differential, phase and ground overcurrent. The relay can be configured to accept up to 6 sets of current inputs to provide proper differential restraint for applications with three-winding transformers with windings configured in dual-breaker arrangements.

Key Benefits

  • Secure high-speed transformer differential protection in a cost-effective package
  • Improved security for transformer energization and inrush
  • Application flexibility for transformers with up to 6 sets of CTs
  • Robust network security enabling Critical Infrastructure Protection
  • Advanced automation capabilities
  • Advanced IEC61850 Ed. 2 certified implementation, complete settings via SCL files and IEC 61850-9-2 process bus solution enable resource and platform managing optimization and reduce cost of ownership
  • Routable GOOSE (R-GOOSE) enables GOOSE messages going beyond the substation, which enables wide area protection and control applications
  • Advanced fault and disturbance recording, including internal relay operating signals
  • High-speed inter-relay communications reduce relay-to-relay wiring and associated costs
  • Ambient temperature monitoring with alarms when outside temperature exceeds upper thresholds
  • Supports English, French, Russian, Chinese, Turkish and German languages on the front panel, software and manuals
  • Supports latest edition of waveform capture (COMTRADE 2013) simplifying fault records management

Applications

  • Combined protection for transformer and small bus zone, including breaker-and-a-half and ring bus diameters
  • Stand-alone or component in automated substation control system
  • Applicable for transformers with windings in a ring bus or breaker-and-a-half configuration
Protection & Control
Monitoring & Diagnostic
Communications
Software & Secutrity
What's New

Key Benefits

  • Percent restrained and unrestrained differential protection
  • 2nd harmonic inrush inhibit and overexcitation inhibit
  • TOC elements for backup protection
  • Transducer I/Os (RTD & dcmA)
  • FlexElements
  • FlexCurves

Protection & Control

The T35 transformer protection system is a three-phase transformer relay designed to protect power transformers with up to six windings/restraints. The T35 provides for automatic or user-definable magnitude reference winding selection for CT ratio matching. The T35 performs automatic phase shift compensation for all types of transformer winding connections. The T35 algorithm allows the user to enable removal of the zero-sequence current even for delta-connected transformer windings, facilitating transformers with a variety of grounding configurations. As part of the Universal Relay (UR) Family, the T35 provides a cost-effective solution and superior protection and control.

Functional Block Diagram

T35 Block Diagram

ANSI Divice Numbers & Functions

Device Number Function
49 Thermal Overload
50/87 Instanataneous Differential Overcurrent
51G Ground Time Overcurrent
51P Phase Time Overcurrent
87T Transformer Differential

Key Features

  • Metering - current, voltage, power, energy, frequency, temperature
  • Oscillography – analog and digital parameters at 64 samples/cycle
  • Event Recorder - 1024 time tagged events with 0.5ms scan of digital inputs
  • Data Logger - 16 channels with sampling rate up to 1 sample/cycle
  • Setting for security audit trails for tracking changes to T35 configurations

Monitoring & Diagnostic

The T35 includes high accuracy metering and recording for all AC signals. Voltage, current, and power metering are built into the relay as a standard feature. Current and voltage parameters are available as total RMS magnitude, and as fundamental frequency magnitude and angle.

Monitoring & Diagnostic

The T35 is the single point for protection, control, metering, and monitoring in one integrated device that can easily be connected directly into DCS or SCADA monitoring and control systems like Viewpoint Monitoring as shown.

Advanced Automation

The T35 incorporates advanced automation features including powerful FlexLogic™ programmable logic, communication, and SCADA capabilities that far surpass what is found in the average transformer relay. The T35 integrates seamlessly with other UR relays for complete system protection.

Advanced Automation

FlexLogic allows for the customization of the T35 to operate and control the breakers and other auxiliary devices needed to fit most transformer protection schemes and applications.

Key Features

  • Complete IEC 61850 Process Bus solution providing resource optimization and minimizing total P & C life cycle costs
  • Three independent 100Mbps Ethernet ports enable purpose specific LAN support that eliminates latency effect of heavy traffic protocols on mission critical communication services
  • Embedded IEEE 1588 time synch protocol support eliminates dedicated IRIG-B wiring requirements for IEDs
  • Direct I/O secures high-speed exchange of binary data between URs
  • Increase network availability by reducing failover time to zero through IEC62439-3 “PRP” support

Advanced Communications

The T35 provides advanced communications technologies for remote data and engineering access, making it easy and flexible to use and integrate into new and existing infrastructures. Direct support for fiber optic Ethernet provides high-bandwidth communications allowing for low-latency controls and high-speed file transfers of relay fault and event record information. The available three independent and redundant Ethernet options provide the means to create fault tolerant communication architectures in an easy, cost-effective manner. 
The T35 supports the most popular industry standard protocols enabling easy, direct integration into DCS and SCADA systems.

  • IEC 61850 Ed. 2 with 61850-9-2 (process bus) support
  • DNP 3.0 (serial & TCP/IP)
  • Ethernet Global Data (EGD)
  • IEC 60870-5-103 and IEC 60870-5-104
  • Modbus RTU, Modbus TCP/IP
  • HTTP, TFTP, SFTP and MMS file transfer
  • SNTP and IEEE 1588 for time synchronization
  • PRP as per IEC 62439-3
  • Supports Routable GOOSE (R-GOOSE)

UR Switch Module

UR Switch Module

In addition to providing high-speed connectivity directly to your Universal Relay, the UR Switch Module provides an additional 4 fiber Ethernet ports, for connection to other relays in the system as well as upstream connectivity. It also provides 2 RJ45 copper Ethernet ports which can be used to connect local devices such as PCs, meters, or virtually anything else in the system.

The UR Switch Module provides a simple way to add fully-managed Ethernet networking to your relays and devices without the need for additional hardware or a dedicated communications cabinet.

The UR Switch Module includes all of the management and features that come with all MultiLink managed switches, and can be easily integrated into a network that has other Ethernet switches.

When used in a ring topology with other UR Switch Modules or MultiLink Switches, the UR Switch Module can be configured to use MultiLink’s Smart RSTP feature to provide industry-leading network recovery for ring topologies, at a speed of less than 5ms per switch. Learn More

Interoperability with Enbedded IEC 61850

Use the T35 with integrated IEC 61850 to lower costs associated with generator protection, control and automation. GE’s leadership in IEC 61850 comes from thousands of installed devices and follows on years of development experience with UCA 2.0.

The T35’s IEC 61850 Process Bus module is designed to interface with the Multilin HardFiber System, allowing bi-directional IEC 61850 fiber optic communications. The HardFiber System is designed to integrate seamlessly with existing Universal Relay applications, including protection functions, FlexLogic, metering and communications. Learn more

Cyber Secutrity - CyberSentry™ UR (FW v7.4xx)

CyberSentry enables UR devices to deliver full cyber security features that help customers to comply with NERC CIP and NITIR 7628 cyber security requirements through supporting the following core features:

Password Complexity

Supporting up to 20 alpha- numeric or special characters, UR passwords exceed NERC CIP requirements for password complexity. Individual passwords per role are available.

AAA Server Support (Radius)

Enables integration with centrally managed authentication and accounting of all user activities and uses modern industry best practices and standards that meet and exceed NERC CIP requirements for authentication and password management.

Role Based Access Control (RBAC)

Efficiently administrate users and roles within UR devices. The new and advanced access functions allow users to configure up to five roles for up to eight configurable users with independent passwords. The standard “Remote Authentication Dial In User Service” (Radius) is used for authentication. 

Event Recorder (Syslog for SEM)

Capture all cyber security related events within a SOE element (login, logout, invalid password attempts, remote/local access, user in session, settings change, FW update, etc), and then serve and classify data by security level using standard Syslog data format. This enables UR devices integration with established SEM (Security Event Management) systems.

EnerVista™ Software

The EnerVista™ suite is an industry-leading set of software programs that simplifies every aspect of using the T35 relay. The EnerVista™ suite provides all the tools to monitor the status of the protected asset, maintain the relay, and integrate information measured by the T35 into DCS or SCADA monitoring systems. Convenient COMTRADE and Sequence of Events viewers are an integral part of the UR setup software included with every UR relay, to carry out postmortem event analysis and ensure proper protection system operation. Learn More

Enervista Software

New and Enhanced Communication Capabilities

  • Routable GOOSE (R-GOOSE) enables GOOSE messages going beyond the substation, which enables wide area protection and control applications (FW v7.40)
  • Increases GOOSE message reception up to 64 remote devices (FW v7.40)
  • IEC 61850 in line with Edition 2, IEC 61850 SCL file for all relay's setting (FW 7.30)
  • Three independent Ethernet ports
  • Time synchronization via IEEE 1588 (FW v7.00)
  • PRP as per IEC 62439-3 (FW 7.10)
  • IEC 60870-5-103 (FW v7.20)
  • New IRC module that combines C37.92 multimode and direct connection singlemode (FW v7.20)

Cyber Security - CyberSentry UR (FW v7.xx)

CyberSentry enables UR devices to deliver full cyber security features that help customers to comply with NERC CIP and NITIR 7628 cyber security requirements through supporting the following core features:

  • Password Complexity
  • AAA Server Support (Radius)
  • Role Based Access Control (RBAC)
  • Event Recorder (Syslog for SEM)

Fully Compatible with the Multilin HardFiber System - Provides support for GE's IEC 61850 HardFiber Process Bus Solution:

Complete IEC 61850 Process Bus Solution providing resource optimization and minimizing total P&C life cycle costs. Learn More

Extended Oscillography Records (FW v7.xx)

  • Supports IEEE C37.111-1999/2013, IEC 60255-24 Ed 2.0 COMTRADE 2013 standard (FW v7.40)
  • Configurable events allow for records of up to 45s at 64 samples per cycle
FW version 5.90

New and Enhanced Protection and Control Functionality (FW version 5.90)

  • New thermal overload element
  • New CT failure element for increased current differential selectivity (FW version 7.00)