GE MIFII GEK-106237P User Manual

2-18 MIFII Digital Feeder Relay GEK-106237P
2.11 OSCILLOGRAPHY (AVAILABLE IN OPTION 1 AND OPTION 2 MODELS) 2 PRODUCT DESCRIPTION
2
2.11OSCILLOGRAPHY (AVAILABLE IN OPTION 1 AND OPTION 2 MODELS)
MIFII1000/3000 stores an oscillography record, with a resolution of 8 samples per cycle with a length of 24 cycles
(including 2 pre-fault cycles), with the following information:
Instantaneous values ofphase (Ia, Ib, Ic) and ground (I
g
) currents. The 2 first cycles are pre-fault cycles.
• Digital information:
•Pickups (protection functions
1
)
•Trip inhibition by digital input (protection functions
2
)
•Trips (protection functions
3
)
•Ready (protection in service)
•Auxiliary digital outputs
•Digital inputs
•Breaker 52A, Breaker 52B, (status of the digital inputs)
•Status 52 (status of the circuit breaker) (only OPTION 2 models)
•Breaker opening failure (only OPTION 2 models)
•I
2
alarm (only OPTION 2 models)
•Cold load pickup (only OPTION 2 models)
•Group 2 selection by digital input
•EEPROM failure
•Default settings/User settings
• Date and time
• Model
• Number of oscillo
• Value of the differential Ia, Ib, Ic and Ig currents at the moment of the oscillography trigger
• Active group at the moment of the oscillography trigger
• Element settings when retrieving the oscillography record.
• Oscillography and event mask
• File to emulate the relay model in PC program, with the relay settings and memory map
The number of oscillo is a circular counter that increases with each generated oscillography. This value appears on the
relay status and is used only for informative purposes.
The oscillography record is stored in a capacitor backed up RAM memory.
MIFII functionality related to oscillography is performed from the ENERVISTA MII SETUP program. The oscillography
record obtained is stored on the PC in a COMTRADE-IEEE C37.111-1991 format.
There are four possible causes that can produce an oscillography trigger:
1. Pickup of one of the protection functions
2. Trip of one of the protection functions
3. Oscillography trigger by communications
4. Oscillography trigger by digital input
1. Protection functions: 50P1, 50P2, 50G1, 50G2, 51P, 51G, 49, general
2. Protection functions: 50P1, 50P2, 50G1, 50G2, 51P, 51G, 49, general
3. Protection functions: 50P1, 50P2, 50G1, 50G2, 51P, 51G, 49, general

GE MIFII GEK-106237P Specifications

General

Brand	GE
Model	MIFII GEK-106237P
Category	Accessories
Language	English