Overview
The “Interturn fault detection” element is a complement to the percent differential function. It detects interturn fault conditions using voltage compensated differential currents. The voltage-based compensation term cancels out steady state differential current of each phase. The resulting compensated differential current is sensitive enough to pick up turn-to-turn faults.
For more detailed information on “Interturn fault detection” element, refer to GE, Universal Relay (UR) family of products, Version 8.0x manuals.
To see other supported elements, click here.
Setting Parameters
Modbus memory map for Setting parameters
| Products | Hex address | Register name | Range | Units | Step | Format | Default |
| T35, T60 | D9A0 | Interturn Fault Detect 1 Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | D9A1 | Interturn Fault Detect 1 Prot Transformer | 0 to 1 | — | 1 | F690 | 0 (XFMR 1) |
| " | D9A2 | Interturn Fault Detect 1 Supv Src | 0 to 5 | — | 1 | F167 | 0 (SRC 1) |
| " | D9A3 | Interturn Fault Detect 1 Autoset Mode | 0 to 2 | — | 1 | F691 | 1 (AUTO) |
| " | D9A4 | Interturn Fault Detect 1 K-Fact Updt | 1 to 240 | min | 1 | F001 | 30 |
| " | D9A5 | Force Interturn 1 K UP | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | D9A7 | Interturn Fault Detect 1 Pickup | 0.01 to 0.5 | pu | 0.001 | F001 | 50 |
| " | D9A8 | Interturn Fault Detect 1 Pickup Delay | 0.02 to 60 | s | 0.01 | F001 | 20 |
| " | D9A9 | Interturn Fault Detect 1 Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | D9AB | Interturn Fault Detect 1 Target | 0 to 2 | — | 1 | F109 | 0 (Self-reset) |
| " | D9AC | Interturn Fault Detect 1 Events | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | D9AE | …Repeated for Interturn Fault Detect 2 |
| F102 | 0 = Disabled, 1 = Enabled | ||||||
| F109 | 0 = Self-reset, 1 = Latched, 2 = Disabled | ||||||
| F167 | 0 = SRC 1, 1 = SRC 2, 2 = SRC 3, 3 = SRC 4, 4 = SRC 5, 5 = SRC 6 | ||||||
| F690 | 0=XFMR, 1=XFMR 2 | ||||||
| F691 | 0=NONE, 1=AUTO, 2=Manual | ||||||
Logics & highlights
Transformer interturn fault detection logic
