GPM-F Field Ground Protection Module
Complete generator system protection
The field ground protection module, GPM-F works in combination with the Multilin G60 to detect ground faults in the field winding of the generator. Providing application flexibility, the field ground protection module can be configured for either single point injection or double point injection based on application requirements. The solution includes: two stage field ground detection, injected voltage and current supervision, brush lift-off detection, field over and under current elements and field ground fault location.
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GPM-F Field Ground Protection Module
Complete generator system protection
The field ground protection module, GPM-F works in combination with the Multilin G60 to detect ground faults in the field winding of the generator. Providing application flexibility, the field ground protection module can be configured for either single point injection or double point injection based on application requirements. The solution includes: two stage field ground detection, injected voltage and current supervision, brush lift-off detection, field over and under current elements and field ground fault location.
Key Benefits | |||
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Applications | |||
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Protection
- Two stage field ground resistance based element - 64F
- Wide range fault resistance coverage (1- 500Kohms)
- Injection frequency range 0.1 – 3Hz based on field winding capacitance
- Fault location feature while using single point injection
- Brush-lift off detection
- Injection blocking input for field flashing condition
- Supports redundant G60 configurations
- Field over current and field under current elements using dcmA input of G60
Diagnostics
- Power swing blocking and out-of-step tripping
- Backup distance
- Reverse / low forward power
- Restricted ground fault
- Overexcitation
- Generator unbalance
Providing application flexibility and diagnostic information, single point injection provides the ability to quickly identify the fault location in the field winding, thus reducing damaging the generator and reducing down-time. Single point injection has traditionally been the protection method used for generators with brushless excitation.
In addition to single point injection, the GPM-F module allows for ground fault detection via double point injection. Double point injection has typically been used on applications where generators are equipped with static excitation. When the GPM-F is connected for double point injection the fault location feature is not available. It is recommended that is fault location is required that the GPM-F be configured for single point injection.
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