Schweitzer Engineering Laboratories SEL-351 - Page 31

Date Code 20001006 Introduction and Specifications 1-15
SEL-351 Instruction Manual
Serial
Communications
One rear-panel and one front-panel EIA-232 serial communications port
(Model 0351xT).
Two rear-panel and one front-panel EIA-232 serial communications ports
(Models 0351x0, 0351x1, and 0351xY).
One rear-panel EIA-485 serial port with 2100 Vdc of isolation (all models).
Per Port Baud Rate Selections: 300, 1200, 2400, 4800, 9600, 19200,
38400
Power Supply
125/250 V supply 85 - 350 Vdc or 85 - 264 Vac; <15 W
24/48 V supply: 20 - 60 Vdc; <15 W
Dimensions
See Figure 2.1.
Weight
13 lbs. (5.92 kg) — 2U rack unit height relay
16 lbs (7.24 kg) — 3U rack unit height relay
Routine
Dielectric Test
Current inputs: 2500 Vac for 10 seconds.
Power supply, optoisolated inputs, and output contacts: 3000 Vdc for 10
seconds.
The following IEC 255-5 Dielectric Tests : 1977 are performed on all units
with the CE mark:
2500 Vac for 10 seconds on analog inputs.
3100 Vdc for 10 seconds on power supply, optoisolated inputs, and
output contacts.
Operating
Temp.
-40° to 185°F (-40° to +85°C) (type test).
(LCD contrast impaired for temperatures below -20°C.)
IEC 68-2-1: 1990 Basic environmental testing procedures, Part 2: Tests -
Test Ad: Cold (type test).
IEC 68-2-2: 1974 Basic environmental testing procedures, Part 2: Tests -
Test Bd: Dry Heat (type test).
Environment
IEC 68-2-30: 1980 Basic environmental testing procedures, Part 2:
Tests, Test Db and guidance: Damp heat, cyclic (12 + 12-hour cycle),
(six-day type test).
IEC 529: 1989-11 Degrees of Protection Provided by Enclosures - IP30,
IP54 from the front panel using the SEL-9103 Front Cover Dust and Splash
Protection (type test).
RFI and
Interference
Tests
IEEE C37.90.1 - 1989 IEEE SWC Tests for Protective Relays and Relay
Systems (3 kV oscillatory, 5 kV fast transient) (type test).
IEEE C37.90.2 IEEE Trial-Use Standard, Withstand Capability of Relay
Systems to Radiated Electromagnetic Interference from Transceivers, 10
V/m (type test).
Courtesy of NationalSwitchgear.com