Toshiba GR-200 Series Instruction Manual page 626

The recording function consists of three recording features: (1) Fault recorder, (2) Event
recorder, and (3) Disturbance recorder. The fault recorder collects the information about the
power system quantities when a fault occurs. The event recorder groups state information
when the changes are detected. The disturbance recorder is designed to memory the various
quantities—numerical analog data and logic data (binary data)—from the monitoring function
and the BIO modules; it is possible to analyze the disturbance using the engineering tool (GR-
TIMES), which can draw several chronological waves.
Fault recorder
During the fault, the fault recorder can memorize reasons by equipment failures/operation
states, system information etc. It starts by injecting a signal coming from the TRC alarm-signal
generation logic, but is also started by a trigger provided by PLC function. The fault recorder
captures the following items for each fault:
• Date and time at the fault
•
Fault phase information
• Operating mode information
• FL calculation result (if the FL function operates)
• Evolving faults (if the ARC function operates)
•
Fault and pre-fault quantities
Types of recording information
8.1.1
The fault recorder can cyclically memory past eight faults; the oldest memory will be erased
cyclically if another fault occurs. The memorized information has 1ms accuracy. If a fault
occurs, the fault recorder is directed to operate to memory operating modes etc. about the fault.
Date and time at fault
(i)
The date and time at the fault is recorded. The date and time information is provided by the
clock function (see Chapter
Fault phase information
(ii)
Information about fault phases are recorded using the recording identifiers ('OPT-PHASE-
A,B,C, and -N' signals), which the TRC function provides.
Mode information
(iii)
At the occurrence of a fault, the protection functions gives the fault recorder the reasons of
tripping; the reasons are brought using operation identifiers† and logical signals‡. The fault
recorder can have up to 192 of all identifiers and signals in the IED. The operation identifiers
are chosen using the settings [OP Mode ID1] to [OP Mode ID128]. The settings [OP Mode
Technical description: Clock function →
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p. 565).
GRE200 (1,2)