10.5
Date Code 20171006 Instruction Manual SEL-400 Series Relays
Testing, Troubleshooting, and Maintenance
Testing Features and Tools
Testing Features and Tools
All SEL-400 series relays provide the following features that can assist you
during relay testing:
➤ Metering
➤ High-resolution oscillography
➤ Event reports
➤ Event summary reports
➤ Sequential Events Recorder (SER) reports
Certain relay commands are useful in confirming relay operation. The following
commands, for example, aid you in testing the relay:
➤ TAR
➤ PUL
➤ TEST DB
➤ TEST DB2
➤ TEST FM
In addition, the relay incorporates a low-level test interface where you can inter-
rupt the connection between the relay input transformers and the input processing
module. Use the low-level test interface to apply reduced-scale test quantities
from the SEL-4000 Relay Test System; you do not need to use large power
amplifiers to perform relay testing.
Metering
NOTE: Some relays support a single
dc battery monitor. See the relay-
specific instruction manual to
determine whether one or two dc
battery monitors are supported.
The specific metering data available depends on the relay model. See Section 7:
Metering, Monitoring, and Reporting in the product-specific instruction manual
for detailed information. In general, the metering data show the ac currents and
voltages (magnitude and phase angle) connected to the relay in primary values. In
addition, metering shows many other quantities including the power system fre-
quency (FREQ) and the voltage input to the station dc battery monitors (Vdc1
and Vdc2). Compare these quantities against quantities from other devices of
known accuracy. The metering data are available at the serial ports, from the
ACSELERATOR QuickSet SEL-5030 Software HMI, and at the front-panel LCD
METER menu. See METER on page 14.37, Meter on page 4.16, QuickSet HMI on
page 2.19, Examining Metering Quantities on page 3.35 for more information.
High-Resolution Oscillography
NOTE: Control Inputs are sampled at
2 kHz, and the raw binary data (prior
to debounce timer conditioning) is
available in high-resolution oscillography.
The COMTRADE data labels for raw
control input data are IN101–IN107,
IN201–IN2
nn
, IN301–IN3
nn
,IN401–
IN4
nn
, IN501–IN5
nn
, based on
installed hardware, where
nn
=01–08
or 01–24.
The relay takes an unfiltered data snapshot of the power system at each event
trigger or trip. The relay samples power system data at high sample rates from
1 kHz to 8 kHz. You can use the
ACSELERATOR Analytic Assistant SEL-5601
Software or other COMTRADE viewing program to export and view these raw
data in a binary COMTRADE file format. Use high-resolution oscillography to
capture fast power system transients or to examine low-frequency anomalies in
the power system. See Raw Data Oscillography on page 9.9 for more information.
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