Overview
The “Hottest spot temperature” element provides a mechanism to detect abnormal winding hottest-spot temperatures inside the transformer. It can be set to alarm or trip in cases where the computed hottest-spot temperature is above the pickup threshold for a user-specified time (considered as transformer overheating).
For more detailed information on “Hottest spot temperature” 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 |
| G30, T35, T60 | 3E3E | Transformer Hottest Spot Function | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| " | 3E3F | Transformer Hottest Spot Pickup | 50 to 300 | °C | 1 | F001 | 140 |
| " | 3E40 | Transformer Hottest Spot Delay | 0 to 30000 | min | 1 | F001 | 1 |
| " | 3E41 | Transformer Hottest Spot Block | 0 to 4294967295 | — | 1 | F300 | 0 |
| " | 3E43 | Transformer Hottest Spot Target | 0 to 2 | — | 1 | F109 | 0 (Self-reset) |
| " | 3E44 | Transformer Hottest Spot Events | 0 to 1 | — | 1 | F102 | 0 (Disabled) |
| F102 | 0 = Disabled, 1 = Enabled | ||||||
| F109 | 0 = Self-reset, 1 = Latched, 2 = Disabled | ||||||
Logics & highlights
Transformer hottest-spot temperature logic
