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The GE T35A00HCHF8CH6UM8CP6CU8AWXX, also cataloged as the T35 Transformer Protection System, operates as a dedicated hardware component for multi-winding transformer management, phase differential protection, and substation bus monitoring within Multilin Universal Relay (UR) platforms.
| Parameter | Specification |
|---|---|
| Model | T35A00HCHF8CH6UM8CP6CU8AWXX |
| Brand | GE (General Electric / Multilin) |
| Series | Universal Relay (UR) Series / T35 |
| Origin | Canada (CA) |
| Weight | Approx. 4.1 kg (9.0 lbs) net mass |
| Dimensions | 4U standard 19" rack-mount horizontal chassis assembly |
| Operating Temp | -40 to +60 deg C (-40 to +140 deg F) continuous rating |
| Power Consumption | 15 VA typical / Max 30 W based on module loading configurations |
| Nominal Logic Inputs | 24 to 250 VDC external wetting options |
| Relay Contact Output | Form A / Form C electromechanical output blocks |
| AC Current Inputs | 1 A / 5 A dual-rated phase and ground CT inputs |
| AC Voltage Inputs | 0 to 300 V nominal VT sensing paths |
| Network Interfacing | High-speed Ethernet module with redundant architecture options |
| Time Synchronization | Redundant SNTP and IEEE 1588 IRIG-B hardware decoding |
Q: How does the internal 2nd harmonic inhibit mechanism preserve stability during transformer energization?
A: The digital signal processor runs discrete Fourier transforms (DFT) to isolate the second-harmonic current vectors from the fundamental operating frequency. If the 2nd harmonic ratio exceeds the set percentage threshold (typically programmed around 15% to 20%), the relay determines that an inrush phenomenon is taking place and suppresses the instantaneous differential element (87T) to eliminate false trips.
Q: Can an individual I/O or CT/VT module block be hot-swapped while the main chassis is powered up?
A: No. The parallel backplane pins and multi-point terminal block sockets lack isolated current-limiting gates for live card insertion. Pulling or sliding hardware modules into an active chassis can cause backplane data parity exceptions, interrupt critical trip sensing paths, or damage delicate solid-state elements via inductive voltage spikes.

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