GE T35A00HCHF8CH6UM8AP6CU8AW6C Transformer Protection

The GE Multilin T35A00HCHF8CH6UM8AP6CU8AW6C, also cataloged as the T35 Transformer Protection System, operates as a dedicated hardware component for multi-winding transformer management, phase differential protection, and automated substation parameter monitoring within utility and industrial power systems.

Suffix Breakdown & Model Matrix

• T35: Base Protection Relay Unit for Transformer Applications
• A00: Dual RS485 Communication Ports
• H: Horizontal Mounting Configuration (Standard 19-inch rack)
• C0: Parallel Redundancy Protocol (PRP) Network Layer
• F: Vertical Front Panel Interface equipped with English Text Display
• 8CH: Digital I/O Module comprising 8 Form-C Mechanical Outputs
• 6U: Transducer I/O Module containing 6 Form-A (Unmonitored) Outputs and 4 Digital Inputs
• 8A: Single-Channel Inter-Relay Fiber Communications Interface (820 nm, multimode, LED)

Hardware Specifications

GE Industrial Control and System Coordination

• Backplane Bus Communication Velocity Licences: The internal 4U chassis backplane coordinates data routing between the modular 8CH digital I/O blocks, 6U transducer arrays, and the central CPU. Sampling registries from the phase and ground CT loops are processed across parallel copper bus lines within sub-millisecond execution cycles to prevent arithmetic latency during fault dynamic events.
• Profinet / EtherNet/IP Deterministic Networks: Outfitted with the C0 suffix hardware layer, the relay supports native Parallel Redundancy Protocol (PRP) communication routing over active network segments. The system duplicates every outgoing telemetry frame across two independent physical network paths simultaneously, preventing packet dropouts or data transmission loss during localized network infrastructure failure.

Frequently Asked Questions

Q: How does the internal processor handle data collection when an asymmetrical fault occurs on the transformer primary windings?

A: The three phase CT inputs and the single ground CT interface sample current waveforms continuously through 14-bit analog-to-digital converters. The internal calculation processor breaks down the sampled inputs into symmetrical components, running instantaneous differential and restraint calculations to detect winding phase shifts within less than 1 ms.

Q: Can the 8A fiber module line be disconnected or cleaned while the relay power supply is active?

A: Yes, fiber optic connections can be maintained while the unit is powered, as long as the protective relay channel is bypassed or placed into test mode via the front panel menu. Disconnecting the active 820 nm multimode LED link without disabling the channel will instantly trigger an inter-relay communication link failure alarm and drop any dependent remote transfer trip logic.