Schweitzer Engineering Laboratories SEL-487V - SNTP Time Synchronization

Schweitzer Engineering Laboratories, Inc. SEL-487V Data Sheet
13
=>>MET H <Enter>
Relay 1 Date: 03/17/2013 Time: 12:39:56.328
Station A Serial Number: 1120820717
Magnitudes of Harmonic Inputs (Amps Sec, Volt Sec)
H IAW IBW ICW IAX IBX ICX VAY VBY VCY VAZ VBZ VCZ
1 1.00 1.00 1.00 0.00 0.00 0.00 60.00 60.00 60.00 0.00 0.00 0.00
2 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00
3 0.50 0.50 0.50 0.00 0.00 0.00 19.79 19.76 19.81 0.00 0.00 0.00
4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
5 0.50 0.50 0.50 0.00 0.00 0.00 19.75 19.73 19.76 0.00 0.00 0.00
6 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
7 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
8 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
9 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
10 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00
11 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00
12 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
13 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
FREQ (Hz) 60.000 Frequency Tracking = Y
Sequential Events Recorder (SER)
This feature provides a broad perspective of relay
element operation. Items that trigger an SER entry are
selectable and can include input/output change of state,
element pickup/dropout, recloser state changes, etc. The
relay SER stores the latest 1,000 entries.
Analog Signal Profiling
The SEL-487V provides analog signal profiling for up to
20 analog quantities. Any analog quantity measured or
calculated by the SEL-487V can be selected for analog
signal profiling. Signal sampling rates of 1, 5, 15, 30, and
60 minutes can be selected through settings. The analog
signal profile report provides a comma-separated
variable (CSV) list that can be loaded into any
spreadsheet or database for analysis and graphical
display.
SEL
OGIC enable/disable functions can start and stop
signal profiling based on Boolean or analog comparison
conditions.
High-Accuracy Timekeeping
With a combination of IRIG-B and a global positioning
satellite, the SEL-487V time-tags oscillography to within
10 µs accuracy. This high accuracy can be combined with
the high sampling rate of the relay to synchronize data
from across the system with an accuracy of better than
1/4 electrical degree. This allows examination of the
power system state at given times, including load angles,
system swings, and other system-wide events. Triggering
can be via external signal (contact or communications
port), set time, or system event. Optimal calibration of
this feature requires a knowledge of primary input
component (VT and CT) phase delay and error.
A single IRIG-B time-code input synchronizes the
SEL-487V time to within ±1 ms of the time-source input.
A convenient source for this time code is the SEL-2032
Communications Processor (via Serial Port 1 on the
SEL-487V).
SNTP Time Synchronization
Use simple network time protocol (SNTP) to cost-
effectively synchronize SEL-487V relays equipped with
Ethernet communication to as little as ±5 ms over
standard Ethernet networks. Use SNTP as a primary time
source, or as a backup to a higher accuracy IRIG-B time
input to the relay.
Figure 14 SNTP Diagram
Substation Battery Monitor for
DC Quality Assurance
The SEL-487V measures and reports the substation
battery voltage. Programmable threshold comparators
and associated logic provide alarm and control of
batteries and charger. The relay also provides battery
system ground detection. Monitor these thresholds with
an SEL communications processor and trigger messages,
telephone calls, or other actions.
The measured dc voltage is reported in the METER
display via serial port communications, on the LCD, and
in the event report. The event report data provides an