1-14 Introduction and Specifications Date Code 20001006
SEL-351 Instruction Manual
Output Contacts
Standard:
Per IEC 255-0-20 : 1974, using the simplified method of assessment
6 A continuous carry
30 A make per IEEE C37.90 : 1989
100 A for one second
270 Vac/360 Vdc MOV for differential surge protection.
Pickup/dropout time: < 5 ms
Breaking Capacity (L/R = 40 ms):
48 V 0.5 A 10,000 operations
125 V 0.3 A 10,000 operations
250 V 0.2 A 10,000 operations
Cyclic Capacity (L/R = 40 ms):
48 V 0.5 A 2.5 cycles per second
125 V 0.3 A 2.5 cycles per second
250 V 0.2 A 2.5 cycles per second
High-current interruption option:
6 A continuous carry
30 A make per IEEE C37.90 : 1989
330 Vdc MOV for differential surge protection
Pickup time: < 5 ms
Dropout time: < 8 ms (typical)
Breaking Capacity: 10 A 10,000 operations
48 and 125 V (L/R = 40 ms)
250 V (L/R = 20 ms)
Cyclic Capacity: 10 A 4 cycles in 1 second, followed
by 2 minutes idle for thermal dissipation
48 and 125 V (L/R = 40 ms)
250 V (L/R = 20 ms)
Note: Do not use high-current interrupting output contacts to switch ac
control signals. These outputs are polarity dependent.
Optoisolated
Input Ratings
250 Vdc: on for 200 - 300 Vdc; off below 150 Vdc
125 Vdc: on for 105 - 150 Vdc; off below 75 Vdc
110 Vdc: on for 88 - 132 Vdc; off below 66 Vdc
48 Vdc: on for 38.4 - 60 Vdc; off below 28.8 Vdc
24 Vdc: on for 15.0 - 30 Vdc
With nominal control voltage applied, each optoisolated input draws
approximately 4 mA of current.
Time-Code
Input
Relay accepts demodulated IRIG-B time-code input at Port 2. Relay time is
synchronized to within ±5 ms of time-source input.
Courtesy of NationalSwitchgear.com
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