(22) IDMT Relay Curve (1.8.23).xlsx

	C	D	E	F	G	H	K	BD	BL	BM	BN	BO	BP	BQ	BR	BS	BT	BU	BV	BW	BX	BY	BZ	CA	CB	CC	CD	CE
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2	IDMT Relay Setting Calculation						IDMT Relay Curve
3	Jignesh.Parmar, www.electricalnotes.wordpress.com,jiguparmar@yahoo.com
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5		Relay-1	Relay-2	Relay-3	Relay-4	Relay-5
6	Feeder Type :
7	Protection Type :
8	System Voltage(KV) :	0,4	33	33	33	33
9	System Load(KVA) :	20	50000	50000	50000	50000						2
10	Relay Code :										Relay-1	0.100			Relay-2	0.500			Relay-3	0.800			Relay-4	0.900			Relay-5	0.100
11	Relay No :								0.5	250	50	0.172	0.5	250	50	0.860	0.5	250	50	1.376	0.5	250	50	1.548	0.5	50	10	0.297
12	CT.Pri (A) :	500	500	500	500	100		Normal Inverse (NI)	1	500	100	0.145	1	500	100	0.726	1	500	100	1.161	1	500	100	1.306	1	100	20	0.227
13	CT.Sec (A) :	5	5	5	5	5		Very Inverse (VI)	1.5	750	150	0.133	1.5	750	150	0.664	1.5	750	150	1.063	1.5	750	150	1.195	1.5	150	30	0.199
14	Primary Fault Current (Amp) :	4500	4500	4500	4500	4500		Exteremely Inverse (EI)	2.5	1250	250	0.120	2.5	1250	250	0.600	2.5	1250	250	0.959	2.5	1250	250	1.079	2.5	250	50	0.172
15	Grading of Relay (Sec) :	0.3	0.3	0.3	0.3	0.3		Long Inverse	3	1500	300	0.116	3	1500	300	0.579	3	1500	300	0.927	3	1500	300	1.043	3	300	60	0.164
16	System Current (Amp) :	#VALUE!	875	875	875	875			3.5	1750	350	0.113	3.5	1750	350	0.563	3.5	1750	350	0.901	3.5	1750	350	1.014	3.5	350	70	0.158
17	Required Pick Up Setting of Relay: ( X In)	#VALUE!	1.75	1.75	1.75	8.75			4	2000	400	0.110	4	2000	400	0.550	4	2000	400	0.880	4	2000	400	0.990	4	400	80	0.153
18	Actual Pick Up Setting of Relay: ( X In)	1.75	1.75	1.75	1.75	1.75			4.5	2250	450	0.108	4.5	2250	450	0.539	4.5	2250	450	0.862	4.5	2250	450	0.970	4.5	450	90	0.149
19	Time Setting (TMS) Sec :	0.1	0.5	0.8	0.9	0.1			5.5	2750	550	0.104	5.5	2750	550	0.520	5.5	2750	550	0.833	5.5	2750	550	0.937	5.5	550	110	0.142
20	Curve Selection :	Normal Inverse (NI)	Normal Inverse (NI)	Normal Inverse (NI)	Normal Inverse (NI)	Normal Inverse (NI)			6	3000	600	0.103	6	3000	600	0.513	6	3000	600	0.821	6	3000	600	0.923	6	600	120	0.139
21	CT Ratio (Amp) :	100	100	100	100	20			6.5	3250	650	0.101	6.5	3250	650	0.506	6.5	3250	650	0.810	6.5	3250	650	0.911	6.5	650	130	0.137
22	Relay Pick Up Current (Amp) :	8.75	8.75	8.75	8.75	8.75			7	3500	700	0.100	7	3500	700	0.500	7	3500	700	0.800	7	3500	700	0.900	7	700	140	0.135
23	PSM :	5.143	5.143	5.143	5.143	25.714			7.5	3750	750	0.099	7.5	3750	750	0.494	7.5	3750	750	0.791	7.5	3750	750	0.890	7.5	750	150	0.133
24	Relay OperatingTime (Sec) :	4.205	4.205	4.205	4.205	2.087			8	4000	800	0.098	8	4000	800	0.489	8	4000	800	0.783	8	4000	800	0.881	8	800	160	0.131
25	Actual Operating Time of Relay (Sec) :	0.420	2.102	3.364	3.784	0.209			8.5	4250	850	0.097	8.5	4250	850	0.485	8.5	4250	850	0.775	8.5	4250	850	0.872	8.5	850	170	0.129
26	Operating Time of Previous Up steam Relay (Sec):	0.720	2.402	3.664	4.084	0.509			9	4500	900	0.096	9	4500	900	0.480	9	4500	900	0.769	9	4500	900	0.865	9	900	180	0.128
27									9.5	4750	950	0.095	9.5	4750	950	0.476	9.5	4750	950	0.762	9.5	4750	950	0.857	9.5	950	190	0.127
28									10	5000	1000	0.094	10	5000	1000	0.472	10	5000	1000	0.756	10	5000	1000	0.850	10	1000	200	0.125
29									10.5	5250	1050	0.094	10.5	5250	1050	0.469	10.5	5250	1050	0.750	10.5	5250	1050	0.844	10.5	1050	210	0.124
30									11	5500	1100	0.093	11	5500	1100	0.466	11	5500	1100	0.745	11	5500	1100	0.838	11	1100	220	0.123
31									11.5	5750	1150	0.092	11.5	5750	1150	0.462	11.5	5750	1150	0.740	11.5	5750	1150	0.832	11.5	1150	230	0.122
32									12	6000	1200	0.092	12	6000	1200	0.459	12	6000	1200	0.735	12	6000	1200	0.827	12	1200	240	0.121
33									12.5	6250	1250	0.091	12.5	6250	1250	0.457	12.5	6250	1250	0.731	12.5	6250	1250	0.822	12.5	1250	250	0.120
34									13	6500	1300	0.091	13	6500	1300	0.454	13	6500	1300	0.726	13	6500	1300	0.817	13	1300	260	0.119
35									13.5	6750	1350	0.090	13.5	6750	1350	0.451	13.5	6750	1350	0.722	13.5	6750	1350	0.813	13.5	1350	270	0.118
36									14	7000	1400	0.090	14	7000	1400	0.449	14	7000	1400	0.718	14	7000	1400	0.808	14	1400	280	0.117
37									14.5	7250	1450	0.089	14.5	7250	1450	0.447	14.5	7250	1450	0.715	14.5	7250	1450	0.804	14.5	1450	290	0.117
38									15	7500	1500	0.089	15	7500	1500	0.444	15	7500	1500	0.711	15	7500	1500	0.800	15	1500	300	0.116
39									15.5	7750	1550	0.088	15.5	7750	1550	0.442	15.5	7750	1550	0.708	15.5	7750	1550	0.796	15.5	1550	310	0.115
40									16	8000	1600	0.088	16	8000	1600	0.440	16	8000	1600	0.704	16	8000	1600	0.792	16	1600	320	0.114
41									16.5	8250	1650	0.088	16.5	8250	1650	0.438	16.5	8250	1650	0.701	16.5	8250	1650	0.789	16.5	1650	330	0.114
42									17	8500	1700	0.087	17	8500	1700	0.436	17	8500	1700	0.698	17	8500	1700	0.786	17	1700	340	0.113
43									17.5	8750	1750	0.087	17.5	8750	1750	0.435	17.5	8750	1750	0.695	17.5	8750	1750	0.782	17.5	1750	350	0.113
44									18	9000	1800	0.087	18	9000	1800	0.433	18	9000	1800	0.693	18	9000	1800	0.779	18	1800	360	0.112
45									18.5	9250	1850	0.086	18.5	9250	1850	0.431	18.5	9250	1850	0.690	18.5	9250	1850	0.776	18.5	1850	370	0.112
46									19	9500	1900	0.086	19	9500	1900	0.429	19	9500	1900	0.687	19	9500	1900	0.773	19	1900	380	0.111
47									19.5	9750	1950	0.086	19.5	9750	1950	0.428	19.5	9750	1950	0.685	19.5	9750	1950	0.770	19.5	1950	390	0.110
48									20	10000	2000	0.085	20	10000	2000	0.426	20	10000	2000	0.682	20	10000	2000	0.767	20	2000	400	0.110
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50										Relay-1		Relay-2		Relay-3		Relay-4		Relay-5
51									250	0.172	250	0.860	250	1.376	250	1.548	50	0.297
52									500	0.145	500	0.726	500	1.161	500	1.306	100	0.227
53									750	0.133	750	0.664	750	1.063	750	1.195	150	0.199
54									1250	0.120	1250	0.600	1250	0.959	1250	1.079	250	0.172
55									1500	0.116	1500	0.579	1500	0.927	1500	1.043	300	0.164
56									1750	0.113	1750	0.563	1750	0.901	1750	1.014	350	0.158
57									2000	0.110	2000	0.550	2000	0.880	2000	0.990	400	0.153
58									2250	0.108	2250	0.539	2250	0.862	2250	0.970	450	0.149
59									2750	0.104	2750	0.520	2750	0.833	2750	0.937	550	0.142
60									3000	0.103	3000	0.513	3000	0.821	3000	0.923	600	0.139
61									3250	0.101	3250	0.506	3250	0.810	3250	0.911	650	0.137
62									3500	0.100	3500	0.500	3500	0.800	3500	0.900	700	0.135
63									3750	0.099	3750	0.494	3750	0.791	3750	0.890	750	0.133
64									4000	0.098	4000	0.489	4000	0.783	4000	0.881	800	0.131
65									4250	0.097	4250	0.485	4250	0.775	4250	0.872	850	0.129
66									4500	0.096	4500	0.480	4500	0.769	4500	0.865	900	0.128
67									4750	0.095	4750	0.476	4750	0.762	4750	0.857	950	0.127
68									5000	0.094	5000	0.472	5000	0.756	5000	0.850	1000	0.125
69									5250	0.094	5250	0.469	5250	0.750	5250	0.844	1050	0.124
70									5500	0.093	5500	0.466	5500	0.745	5500	0.838	1100	0.123
71									5750	0.092	5750	0.462	5750	0.740	5750	0.832	1150	0.122
72									6000	0.092	6000	0.459	6000	0.735	6000	0.827	1200	0.121
73									6250	0.091	6250	0.457	6250	0.731	6250	0.822	1250	0.120
74									6500	0.091	6500	0.454	6500	0.726	6500	0.817	1300	0.119
75									6750	0.090	6750	0.451	6750	0.722	6750	0.813	1350	0.118
76									7000	0.090	7000	0.449	7000	0.718	7000	0.808	1400	0.117
77									7250	0.089	7250	0.447	7250	0.715	7250	0.804	1450	0.117
78									7500	0.089	7500	0.444	7500	0.711	7500	0.800	1500	0.116
79									7750	0.088	7750	0.442	7750	0.708	7750	0.796	1550	0.115
80									8000	0.088	8000	0.440	8000	0.704	8000	0.792	1600	0.114
81									8250	0.088	8250	0.438	8250	0.701	8250	0.789	1650	0.114
82									8500	0.087	8500	0.436	8500	0.698	8500	0.786	1700	0.113
83									8750	0.087	8750	0.435	8750	0.695	8750	0.782	1750	0.113
84									9000	0.087	9000	0.433	9000	0.693	9000	0.779	1800	0.112
85									9250	0.086	9250	0.431	9250	0.690	9250	0.776	1850	0.112
86									9500	0.086	9500	0.429	9500	0.687	9500	0.773	1900	0.111
87									9750	0.086	9750	0.428	9750	0.685	9750	0.770	1950	0.110
88									10000	0.085	10000	0.426	10000	0.682	10000	0.767	2000	0.110
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