GE Multilin T35E00HCH Transformer Protection Relay

The GE Multilin T35E00HCH is a digital transformer protection relay engineered for power transformers, autotransformers, and generator step-up (GSU) units within the Universal Relay (UR) platform. Supporting up to six sets of current transformer (CT) inputs, it provides high-speed percent differential protection alongside phase and ground overcurrent functions for two- and three-winding transformer configurations.

Advanced Protection and System Automation

The relay features adaptive harmonic restraint and blocking algorithms to prevent false trips during transformer inrush or overexcitation conditions. Integrated programmable logic enables custom automation schemes, fault recording, and sequence-of-events logging, allowing operators to analyze grid disturbances and perform localized automated switching.

Display Hardware and Network Protocol Support

Local monitoring and control are provided via a 7-inch full-color graphical display HMI. For substation automation and SCADA integration, the T35E00HCH supports digital substation protocols including IEC 61850 Editions 1 and 2, Routable GOOSE (R-GOOSE), DNP3, and Modbus. Built-in CyberSentry security features align with NERC CIP and IEEE 1686 compliance standards to safeguard communication interfaces.

Technical Specifications

Frequently Asked Questions

Q: How many CT inputs does the T35E00HCH support for multi-winding transformer applications? A: It supports up to six current transformer (CT) input sets, allowing flexible differential protection for two- or three-winding transformers and autotransformers.

Q: What communication protocols are supported by the T35E00HCH for digital substation integration? A: It supports IEC 61850 Editions 1 and 2, Routable GOOSE (R-GOOSE), DNP3, and Modbus protocols.

Q: What cybersecurity standard compliance features are included in this model? A: The relay incorporates GE's CyberSentry security suite, meeting NERC CIP and IEEE 1686 compliance requirements.