Date Code 20000421 Specifications 2-1
SEL-251, -2, -3 Instruction Manual
SECTION 2: SPECIFICATIONS
GENERAL SPECIFICATIONS
Voltage Inputs
120-volt nominal phase-to-phase, three-phase, four-wire connection
150-volt phase-to-neutral saturation limit
Current Inputs 5 A nominal 1 A nominal
(some LP chassis models only)
15 A continuous 3 A continuous
110 A saturation limit 20 A saturation limit
500 A one-second thermal rating 100 A one second thermal rating
Frequency and
Rotation
60 Hz, ABC (50 Hz is an ordering option on some models, ACB rotation is an
ordering option on some models)
Output Contacts Conventional Terminal Blocks
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
Plug-In Connectors (High-Current Interrupting)
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.
To Next Page
Loading...
