3.17
Date Code 20020903
SEL-587Z Instruction Manual
Relay Elements
Overcurrent Protection
Reset Time
Equation 3.11
U.S. Very Inverse Curve: U3
Operating Time
Equation 3.12
Reset Time
Equation 3.13
U.S. Extremely Inverse Curve: U4
Operating Time
Equation 3.14
Reset Time
Equation 3.15
U.S. Short-Time Inverse Curve: U5
Operating Time
Equation 3.16
Reset Time
Equation 3.17
I.E.C. Class A Curve (Standard Inverse): C1
Operating Time
Equation 3.18
Reset Time
Equation 3.19
tr
TD
5.95
1
M
2
–
----------------
•
=
tp
TD
0.0963
3.88
M
2
1
–
----------------
+
•
=
tr
TD
3.88
1
M
2
–
----------------
•
=
tp
TD
0.0352
5.67
M
2
1
–
----------------
+
•
=
tr
TD
5.67
1
M
2
–
----------------
•
=
tp
TD
0.00262
0.00342
M
0.02
1
–
----------------------
+
•
=
tr
TD
0.323
1
M
2
–
----------------
•
=
tp
TD
0.14
M
0.02
1
–
----------------------
•
=
tr
TD
13.5
1
M
2
–
----------------
•
=
Содержание SEL-587Z
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