STP-K130
Transformer protection IED
- Frequency
- 60Hz
- Current
- 5A
- Voltage
- 110/√3 V
- Power
- DC 125V (90~140V)
- Size
- 318 x 261 x 270mm (W x H x D)
Main functions
- Transformer current differential protection function
- Overcurrent/overvoltage protection function
- Prevents misoperation from magnetizing inrush current
- Records fault events and waveforms
- 7-inch touch LCD
- Configurable simplified substation single-line diagram
- Operator-configurable LEDs
- Supports high-speed current differential protection (87HOC) or current ratio differential protection (87R) using the current difference between transformer windings
- Calculates phasors of the transformer currents and the current difference between windings
- Uses the second harmonic to prevent misoperation from magnetizing inrush current
- Blocks relay operation and prevents false alarms or misoperation based on real-time self-monitoring
- Instantaneous (50) and time (51, including definite-time) overcurrent protection for three-phase and neutral currents on both the HV and LV sides of the transformer
- Supports OLTC blocking (50B)
- Supports blocking (50B) for the sudden pressure relay
- Supports various standard inverse-time characteristic curves
- Blocks relay operation and prevents false alarms or misoperation based on continuous self-monitoring
Specifications
General specification
| Division | Item | Specification | Note |
|---|---|---|---|
| Operating conditions | Ambient temperature | -25℃ ~ +55℃ | |
| Relative humidity | 10% ~ 90% | ||
| Elevation | 1,500m | ||
| Rated | Frequency | 60Hz | |
| Current | 5A | ||
| Voltage | 110/√3 V | ||
| Power | DC 125V (90~140V) | ||
| Auxiliary power source | Single phase 220V | ||
| Enclosure | Size | 318 x 261 x 270mm (W x H x D) | |
| Form | Stand-Alone Type | ||
| Weight | 7.5kg | ||
| Material | Aluminum |
Hardware specification
| Division | Specification | Note |
|---|---|---|
| Communication port | Ethernet · 100Base-FX, 2 channels connector : ST type, Multi-mode, 1310nm | IEC 61850 |
| 100Base-T, 1 channels, Twisted-pair | TCP/IP | |
| Console(Front) | Serial 9pin(Male-Type) 1 port | Operational Software |
| Time sync. | IRIG-B120 or SNTP | |
| Console(Back) | Serial 9pin (Male-Type) 1 port | Reserve |
| Contact input | 24 points | |
| Contact output | 28 points | |
| CT | 8 channels | |
| ZCT | 1 channels | |
| PT | 4 channels | |
| Display | TFT Color Graphic LCD 7" (800 x 400) | |
| Button | 18 | |
| LED | 26 |
