20 Hz generator
20 Hz generator
In order to implement a 100 % stator earth fault protection based on sub harmonic injection, a 20Hz voltage is injected into the generator star point. The 20-Hz generator SGEN-1001 is used in combination with the Band Pass Filter SBPF-1001 in the Stator Earth fault protection. Injection can be performed by connecting the SGEN-1001 and the SBPF-1001 to the load resistor of an earthing or neutral transformer. If an earth fault occurs in the generator star point, the 20 Hz voltage drives a current through the fault resistance. From the driving voltage and the fault current, the protective relay determines the fault resistance.
Category: STATOR PROTECTION SYSTEM.
Features
- 100 % stator earth fault protection based on sub harmonic injection
- Detectsstator earth faults when the generator is offline
- Provides wide range of fault resistance coverage
- Low cost unit with high performance
- Plug and Play System
Applications
- Generators
Specifications
20Hz GENERATOR SPECIFICATION
Power Supply | |
Supply Voltage | 85 to 260V AC, 1φ, (47Hz to 63Hz) or 120V to 370V DC |
System Status | |
LED | Power & Signal |
Alarm | PFC contact |
Output Signal | |
Output Voltage | 50V Peak to peak +10%, Rectangular |
Output Current | 5A continuously |
Output Frequency | 20Hz +5% |
Efficiency | 85% |
Environment | |
Operating Temp | 0°to 55°C |
Humidity | 93% Non-Condensing |
Cooling | Passively Cooled |
Mechanical | |
Dimension | 482mm x 173mm x 245mm +5mm |
Enclosure | Panel/Table Top Mountable |
Protection Class | IP20 |
Test | |
Burn in Test | IEC 60068-2-78 |
Vibration Test | IEC 60068-2-6 |
Shock Test | IEC 60068-2-27 |
Seismic Test | IEC 60068-3-3 |
20Hz BAND PASS FILTER SPECIFICATION
Input Signal | |
Frequency | 20Hz +5% |
Voltage | 50V +10%, Rectangular |
Output Signal | |
Output Voltage | Min 25V RMS without Load |
Output Current | 5A continuously |
Output Frequency | 20Hz +5% |
Withstand voltage | 245V AC at 50Hz (NGT V) |
Impedance at center frequency | <5Ω @ 20Hz |
Impedance at System frequency | >50Ω @ 50Hz |
Environment | |
Operating Temp | 0°to 55°C |
Humidity | 93% Non-Condensing |
Cooling | Passively Cooled |
Mechanical | |
Dimension | 482mm x 173mm x 245mm +5mm |
Enclosure | Panel/Table Top Mountable |
Protection Class | IP20 |
Test | |
Burn in Test | IEC 60068-2-78 |
Vibration Test | IEC 60068-2-6 |
Shock Test | IEC 60068-2-27 |
Seismic Test | IEC 60068-3-3 |