Schweitzer Engineering Laboratories SEL-700G Series, Инструкция по эксплуатации

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4.185
Date Code 20170814 Instruction Manual SEL-700G Relay
Protection and Logic Functions
Other Settings
Time = 15 Minutes
The three five-minute intervals in the sliding time-window at “Time = 15
minutes” each integrate into the following 5-minute totals.
Rolling demand meter response at “Time = 15 minutes” = 3.0/3 = 1.0 per unit.
Pole Open Logic
The SEL-700G includes pole open logic for breaker 52X and/or 52Y,
depending on the model number. Relay Word bit outputs of the logic are
useful in event triggering, SER triggering, and other indication and control
applications.
Figure 4.124 and Figure 4.125 show the logic diagrams for breaker 52X and
52Y, respectively.
Figure 4.124 Pole Open Logic Diagram, Breaker 52X
Five-Minute Totals Corresponding Five-Minute Interval
1.0 per unit 0 to 5 minutes
1.0 per unit 5 to 10 minutes
1.0 per unit 10 to 15 minutes
3.0 per unit
Table 4.52 Pole Open Logic Settings
Setting Prompt Setting Range Setting Name := Factory Default
LOAD DETECTION OFF, 0.25–96.00 A
a
a
Ranges and default settings shown are for relay models with 5 A rated current input. Divide
by 5 for the 1 A rated input.
50LXP := 0.25
a
3POLE OPEN DELAY 0.00–1.00 s 3POXD := 0.00
LOAD DETECTION OFF, 0.25–96.00 A
a
50LYP := 0.25
a
3POLE OPEN DELAY 0.00–1.00 s 3POYD := 0.00
NOTE:
The generator is considered
running if Relay Word bit 3POX = 0.
3POXD
0
Relay
Word
Bits
Setting
52AX
3POX
| IAm |
| ICm |
| IBm |
50LX
50LXP
m = X if X_CUR_IN := TERM
m = Y if X_CUR_IN := NEUT
Relay
Word
Bits