POWER SUPPLY VOLTAGES TEST
Purpose:
Verify that correct output voltages are presented to PORT 1, PORT 2, and the
auxiliary port. These voltages are required by external devices including a dc
powered modem or the SEL-DTA unit.
Method: 1.
Execute the STATUS command and inspect the voltage readings for the +5 and
±15 volt supplies.
2.
At one of the serial ports, use a voltmeter to read the +5 and ±12 volt outputs.
The 12 volt outputs are derived from the 15 volt supplies using three-terminal
regulators. The following pins are the read points:
Pin 1:
+5 Vdc
Pin 4:
+12 Vdc
Pin 6:
-12 Vdc
(female connector as viewed from panel)
Figure 7.13: Nine-Pin Connector Pin Number Convention
3.
Compare the +5 volt readings from the status report and voltmeter. The
voltage difference should be less than 50 MV, and both readings should be
within 0.15 volts of five volts.
The 12 volt supplies should be within 0.5 volts of their nominal values.
CALIBRATION
The SEL-221F Relay is factory calibrated. If you suspect that the relay is out of calibration,
please contact the factory.
7-42
Maintenance & Testing
SEL-221F, -1 Instruction Manual
Date Code 931227
Содержание SEL-221F
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Страница 110: ...Example Event Report 2 4 12 Event Reporting SEL 221F 1 Instruction Manual Date Code 930830 ...
Страница 158: ...SETTINGS SHEET FOR SEL 221F RELAY PAGE 2 OF 6 DATE Date Code 921110 ...
Страница 160: ...SETTINGS SHEET PAGE 4 OF 6 FOR SEL 221F RELAY DATE Date Code 930601 ...
Страница 161: ...SETTINGS SHEET PAGE 5 OF 6 FOR SEL 221F RELAY DATE Date Code 961208 ...
Страница 170: ...Figure 6 2 Horizontal Front and Rear Panel Drawings Date Code 920508 Installation 6 7 SEL 221F 1 Instruction Manual ...
Страница 174: ...Figure 6 8 Dc External Connection Diagram Typical Date Code 920508 Installation SEL 221F 1 Instruction Manual 6 11 ...
Страница 228: ...APPENDICES TABLE OF CONTENTS Parts Placement Diagram Date Code 920508 Table of Contents SEL 221F 1 Instruction Manual i ...
Страница 229: ...SEL 200 Series Relay Main Board Troubleshooting Test Points and Jumper Locations ...