Siemens SG8158-00 manual Figure A.3 Short Inverse Curve SEA2

Appendix A: Trip Curves & Equations

A

100

	10		Dial
			Time
(Seconds)
Trip
Timeto	1
			9.9
			7.0
			5.0
			3.0
	0.1		1.5
			0.5
			0.1
	0.01
	1	10	50

Multiples of Pickup

Figure A.3 Short Inverse Curve (SEA2)

1000
	100		TimeDial
(Seconds)
			9.9
			7.0
Trip	10		5.0
to			3.0
Time			1.5
			0.5
	1
			0.1
	0.1
	1	10	50

Multiples of Pickup

Figure A.4 Long Inverse Curve (SEA3)

54

	100
	10		TimeDial
(Seconds)
			9.9
			7.0
Trip	1		5.0
to			3.0
Time			1.5
			0.5
	0.1
			0.1
0.01
	1	10	50

Multiples of Pickup

Figure A.5 Moderately Inverse Curve (SEA4)

	1000
	100
Trip(Seconds)	10		TimeDial
to
Time			9.9
	1		7.0
			5.0
			3.0
			1.5
	0.1		0.5
			0.1
	0.01
	1	10	50

Multiples of Pickup

Figure A.6 Very Inverse Curve (SEA5)

Siemens Energy & Automation, Inc.