Metering And Recording; Metering And Monitoring; Event Record; Fault Record - Toshiba GRZ100 Manual

GRZ100
optical link via a multiplexer, the optical interface unit G1IF1
(optical to electrical converter) is required for connecting to
the multiplexer. The electrical interface between the
converter and the multiplexer supports CCITT G703 -1.2.1,
-1.2.2, -1.2.3, and X.21(RS530).
GRZ100 Opt.
I/F
a) Optical interface
GRZ100 Opt.
I/F
GI Opt. Fibre
< 2km
SWL, 64kbps
CCITT-G703.
ITUT-X.21
Bit rate: 64kbps
b) Optical interface using multiplexer
GRZ100 Elec.
I/F
Twisted pair wire
CCITT-G703.
ITUT-X.21
RS422
Bit rate: 64kbps
c) Electrical interface using multiplexer
Figure 12 Telecommunication system

METERING AND RECORDING

Metering and Monitoring

The following power system data is measured continuously
and can be displayed on the LCD on the relay fascia, at the
local PC, and the remote PC when connected.
- Voltages (phase, phase to phase, symmetrical
components)
- Currents (phase, phase to phase, symmetrical
components)
- Active power and reactive power
- Frequency
Currents and voltages can be indicated as primary or
secondary values. Active power and reactive power are
indicated as primary values.
The user can monitor the following output and status on the
LCD and at local/remote PCs.
- Relay element output
- Binary input/output
- CB status

Event Record

The most recent 480 time-tagged events are stored with
1ms resolution.
Optical Fibre
64kbps
Optical
I/F
Multi-
Unit
plexer
G1IF1
(Option)
Multi-
plexer
The event recorder can be triggered by a Trip signal, by
Overcurrent trigger elements (OC) and by Undervoltage
trigger elements (UV). In case of 'Trip', the trigger is
performed whenever tripping occurs. In case of OC/UV,
On(used) or Off(not used) is selectable.
Event trigger is freely selectable by using PLC.
Events recorded are as follows.
- Tripping and reclosing
- Alarms
- Change of binary input signal
- Change of relay setting
- Relay failure

Fault Record

A relay trip initiates fault recording. Time-tagged fault
data can be stored for the 8 most recent faults. Fault
record items are as follows.
- Date and time
- Faulted phase
- Phases tripped
- Tripping mode
- Fault location
- Pre-fault and post-fault current and voltage data (phase,
phase to phase, symmetrical components)
- Autoreclose operation
Fault Location
Fault location is initiated by relay tripping signals excluding
breaker failure, overcurrent backup and out-of-step tipping. It
can also be started on receipt of a start signal from external
relays.
Fault location is indicated in km and % for the whole length of
the protected line. The fault location is highly accurate for
parallel lines due to the implementation of zero-sequence
mutual impedance compensation.
The result of the fault location is stored as fault record data.
In GRZ100 with integral communication, improved fault
location accuracy is achieved for 3-ended applications by
use of data received from the remote terminals.
Disturbance Record
The relay can record 8 analog and 32 binary signals. The
disturbance recorder is initiated by operation of the overcurrent
element, undervoltage element and/or relay tripping.
In respect to analog data, phase voltage and current,
residual voltage and current, and the residual current of the
parallel line are recorded. The data can be transformed into
the COMTRADE format.
Pre-fault recording time is fixed at 300ms, post-fault
recording time can be set from 100 ms to 3 s. The maximum
number of stored records depends on the post-fault
recording time. In the case of a post-fault recording time of
500ms, up to 20 disturbance records can be stored. The
record number of the recorded data is displayed on the
LCD.
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