Siemens / Overcurrent protection, Ground (ANSI 50N/51N) _ Setting & highlights _ SI5026

Overview

The “Overcurrent protection, Ground” function detects short circuits in electrical equipment. It can be used as backup or emergency overcurrent protection in addition to the main protection.

For more detailed information on “Overcurrent protection, Ground” function, refer to SIPROTEC 5 devices, V8.30 & higher manuals.

To see other supported functions, click here.

Structure/Embedding of the Function Overcurrent Protection, Ground – Advanced

Structure/Embedding of the Function Overcurrent Protection, Ground – Basic

Setting Parameters

General setting parameters

Addr.	Parameter	C	Setting Options	Default Setting
General
_:2311:9	General:Measured value		3I0 calculated IN measured	IN measured

Setting parameters for Stage with Definite-Time Characteristic Curve

Addr.	Parameter	C	Setting Options	Default Setting
General
_:751:1	Definite-T 1:Mode		off on test	off
_:751:2	Definite-T 1:Operate & flt.rec. blocked		no yes	no
_:751:26	Definite-T 1:Dynamic settings		no yes	no
_:751:27	Definite-T 1:Blk. w. inrush curr. detect.		no yes	no
_:751:102	Definite-T 1:Blk. w. 2nd harm. gnd. det.		no yes	no
_:751:8	Definite-T 1:Method of measurement		fundamental comp. RMS value	fundamental comp.
_:751:3	Definite-T 1:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:751:4	Definite-T 1:Dropout ratio		0.90 to 0.99	0.95
_:751:101	Definite-T 1:Dropout delay		0.00 s to 60.00 s	0.00 s
_:751:6	Definite-T 1:Operate delay		0.00 s to 60.00 s	0.30 s
Dyn.s: AR off/n.rdy
_:751:28	Definite-T 1:Effect. by AR off/n.ready		no yes	no
_:751:35	Definite-T 1:Stage blocked		no yes	no
Dyn.set: AR cycle 1
_:751:29	Definite-T 1:Effected by AR cycle 1		no yes	no
_:751:36	Definite-T 1:Stage blocked		no yes	no
_:751:14	Definite-T 1:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:751:20	Definite-T 1:Operate delay		0.00 s to 60.00 s	0.30 s
Dyn.set: AR cycle 2
_:751:30	Definite-T 1:Effected by AR cycle 2		no yes	no
_:751:37	Definite-T 1:Stage blocked		no yes	no
_:751:15	Definite-T 1:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:751:21	Definite-T 1:Operate delay		0.00 s to 60.00 s	0.30 s
Dyn.set: AR cycle 3
_:751:31	Definite-T 1:Effected by AR cycle 3		no yes	no
_:751:38	Definite-T 1:Stage blocked		no yes	no
_:751:16	Definite-T 1:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:751:22	Definite-T 1:Operate delay		0.00 s to 60.00 s	0.30 s
Dyn.s: AR cycle>3
_:751:32	Definite-T 1:Effected by AR cycle gr. 3		no yes	no
_:751:39	Definite-T 1:Stage blocked		no yes	no
_:751:17	Definite-T 1:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:751:23	Definite-T 1:Operate delay		0.00 s to 60.00 s	0.30 s
Dyn.s: Cold load PU
_:751:33	Definite-T 1:Effect. b. cold-load pickup		no yes	no
_:751:40	Definite-T 1:Stage blocked		no yes	no
_:751:18	Definite-T 1:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:751:24	Definite-T 1:Operate delay		0.00 s to 60.00 s	0.30 s
Dyn.set: bin.input
_:751:34	Definite-T 1:Effected by binary input		no yes	no
_:751:41	Definite-T 1:Stage blocked		no yes	no
_:751:19	Definite-T 1:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:751:25	Definite-T 1:Operate delay		0.00 s to 60.00 s	0.30 s

Setting parameters for Stage with Inverse-Time Characteristic Curve

Addr.	Parameter	C	Setting Options	Default Setting
General
_:781:1	Inverse-T 1:Mode		off on test	off
_:781:2	Inverse-T 1:Operate & flt.rec. blocked		no yes	no
_:781:26	Inverse-T 1:Dynamic settings		no yes	no
_:781:27	Inverse-T 1:Blk. w. inrush curr. detect.		no yes	no
_:781:111	Inverse-T 1:Blk. w. 2nd harm. gnd. det.		no yes	no
_:781:8	Inverse-T 1:Method of measurement		fundamental comp. RMS value	fundamental comp.
_:781:3	Inverse-T 1:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:781:108	Inverse-T 1:Type of char- acter. curve
_:781:113	Inverse-T 1:Min. time of the curve		0.00 s to 1.00 s	0.00 s
_:781:109	Inverse-T 1:Reset		instantaneous disk emulation	disk emulation
_:781:101	Inverse-T 1:Time dial		0.00 to 15.00	1.00
_:781:115	Inverse-T 1:Additional time delay		0.00 s to 60.00 s	0.00 s
Dyn.s: AR off/n.rdy
_:781:28	Inverse-T 1:Effect. by AR off/n.ready		no yes	no
_:781:35	Inverse-T 1:Stage blocked		no yes	no
Dyn.set: AR cycle 1
_:781:29	Inverse-T 1:Effected by AR cycle 1		no yes	no
_:781:36	Inverse-T 1:Stage blocked		no yes	no
_:781:14	Inverse-T 1:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:781:102	Inverse-T 1:Time dial		0.00 to 15.00	1.00
Dyn.set: AR cycle 2
_:781:30	Inverse-T 1:Effected by AR cycle 2		no yes	no
_:781:37	Inverse-T 1:Stage blocked		no yes	no
_:781:15	Inverse-T 1:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:781:103	Inverse-T 1:Time dial		0.00 to 15.00	1.00
Dyn.set: AR cycle 3
_:781:31	Inverse-T 1:Effected by AR cycle 3		no yes	no
_:781:38	Inverse-T 1:Stage blocked		no yes	no
_:781:16	Inverse-T 1:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:781:104	Inverse-T 1:Time dial		0.00 to 15.00	1.00
Dyn.s: AR cycle>3
_:781:32	Inverse-T 1:Effected by AR cycle gr. 3		no yes	no
_:781:39	Inverse-T 1:Stage blocked		no yes	no
_:781:17	Inverse-T 1:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:781:105	Inverse-T 1:Time dial		0.00 to 15.00	1.00
Dyn.s: Cold load PU
_:781:33	Inverse-T 1:Effect. b. cold-load pickup		no yes	no
_:781:40	Inverse-T 1:Stage blocked		no yes	no
_:781:18	Inverse-T 1:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:781:106	Inverse-T 1:Time dial		0.00 to 15.00	1.00
Dyn.set: bin.input
_:781:34	Inverse-T 1:Effected by binary input		no yes	no
_:781:41	Inverse-T 1:Stage blocked		no yes	no
_:781:19	Inverse-T 1:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:781:107	Inverse-T 1:Time dial		0.00 to 15.00	1.00

Setting parameters for Stage with User-Defined Characteristic Curve

Addr.	Parameter	C	Setting Options	Default Setting
General
_:1	User curve #:Mode		off on test	off
_:2	User curve #:Operate & flt.rec. blocked		no yes	no
_:26	User curve #:Dynamic settings		no yes	no
_:27	User curve #:Blk. w. inrush curr. detect.		no yes	no
_:111	User curve #:Blk. w. 2nd harm. gnd. det.		no yes	no
_:8	User curve #:Method of measurement		fundamental comp. RMS value	fundamental comp.
_:3	User curve #:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:113	User curve #:Threshold (absolute)	1 A @ 100 Irated	0.000 A to 35.000 A	0.000 A
		5 A @ 100 Irated	0.00 A to 175.00 A	0.00 A
		1 A @ 50 Irated	0.000 A to 35.000 A	0.000 A
		5 A @ 50 Irated	0.00 A to 175.00 A	0.00 A
		1 A @ 1.6 Irated	0.000 A to 1.600 A	0.000 A
		5 A @ 1.6 Irated	0.000 A to 8.000 A	0.000 A
_:110	User curve #:Reset		instantaneous disk emulation	disk emulation
_:101	User curve #:Time dial		0.05 to 15.00	1.00
_:115	User curve #:Additional time delay		0.00 s to 60.00 s	0.00 s
Dyn.s: AR off/n.rdy
_:28	User curve #:Effect. by AR off/n.ready		no yes	no
_:35	User curve #:Stage blocked		no yes	no
Dyn.set: AR cycle 1
_:29	User curve #:Effected by AR cycle 1		no yes	no
_:36	User curve #:Stage blocked		no yes	no
_:14	User curve #:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:102	User curve #:Time dial		0.05 to 15.00	1.00
Dyn.set: AR cycle 2
_:30	User curve #:Effected by AR cycle 2		no yes	no
_:37	User curve #:Stage blocked		no yes	no
_:15	User curve #:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:103	User curve #:Time dial		0.05 to 15.00	1.00
Dyn.set: AR cycle 3
_:31	User curve #:Effected by AR cycle 3		no yes	no
_:38	User curve #:Stage blocked		no yes	no
_:16	User curve #:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:104	User curve #:Time dial		0.05 to 15.00	1.00
Dyn.s: AR cycle>3
_:32	User curve #:Effected by AR cycle gr. 3		no yes	no
_:39	User curve #:Stage blocked		no yes	no
_:17	User curve #:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:105	User curve #:Time dial		0.05 to 15.00	1.00
Dyn.s: Cold load PU
_:33	User curve #:Effect. b. cold-load pickup		no yes	no
_:40	User curve #:Stage blocked		no yes	no
_:18	User curve #:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:106	User curve #:Time dial		0.05 to 15.00	1.00
Dyn.set: bin.input
_:34	User curve #:Effected by binary input		no yes	no
_:41	User curve #:Stage blocked		no yes	no
_:19	User curve #:Threshold	1 A @ 100 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 100 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 50 Irated	0.010 A to 35.000 A	1.200 A
		5 A @ 50 Irated	0.05 A to 175.00 A	6.00 A
		1 A @ 1.6 Irated	0.001 A to 1.600 A	1.200 A
		5 A @ 1.6 Irated	0.002 A to 8.000 A	6.000 A
_:107	User curve #:Time dial		0.05 to 15.00	1.00