Traditional Recloser Curve Designation: Old Electronic & New Microprocessor-based Form 4C Timing Group µ 1 101 102 111 135 105 117 133 140 116 132 104 142 162 165 106 141 131 114 136 119 138

2 101 102 111 135 105 117 133 140 116 132 104

3 101 102 111 135 105 117 133 140 116 132 104

Form 3A Time-Current Curves Ground Phase 4 101 102 111 135 105 117 133 140 116 132 104

MEA216 1 8* 2

R B C 3 D E N 13 KP

106

106

138 164 118 113 161 152 163 112 107

106 141 131 114 136 119 138

KG 4 11 9 5 6 14 W J M 8 T 7 F 15 L

103 115 121 122 151 139 137 134 120

17 P G H 18 16

200 201 202 µ All curves in groups are interchangeable for phase and ground.

Rev 01/13/99

MEA217 A

V Z Y

Cooper / ANSI Curve Association Chart

Slow Curve: ANSI 51(P/N) High Current Trip:: ANSI 50(P/N) -2 (Instantaneous) Vertical Shift Multiplier: Time Dial Setting (Moves whole curve vertically)

t - Time

High Set (may be set to lockout): ANSI 50(P/N)-3 (Instantaneous)

Constant Time Adder (Definite time): can be added to curves as well as Instantaneous.

Can be programmed with a Constant Time Adder (Definite time).

Fast Curve: ANSI 50(P/N)-1 Use of "Adder" feature rotates line incrementally.

Rev 01/13/99

I - Current

RECLOSER CURVES Time Overcurrent Curve Equation Trip Time = (( A / (M* – C) + B) x n *=P M = Multiples of pickup current n = Time Dial Recloser Curves – Constant for Time Overcurrent Characteristics

EQUATION COEFFICIENTS CURVES Cooper A Curve Cooper B Curve Cooper C Curve Cooper D Curve Cooper E Curve Cooper K Curve Cooper N Curve Cooper R Curve Cooper W Curve Cooper 2 Curve Cooper 3 Curve Cooper 8 Curve Cooper 8* Curve Cooper 8t Curve Cooper 9Curve Cooper 11 Curve

Rev 01/13/99

A 0.208242 4.22886 8.76047 5.23168 10.7656 11.9847 0.285625 0.001015 15.4628 11.4161 13.5457 1.68546 1.42302 1.42732 2.75978 21.6149

B -0.002370 0.008933 0.029977 0.000462 0.004284 -0.000324 -0.071079 -0.133810 0.056438 0.488986 0.992904 0.158114 -0.007846 -0.003704 5.10647 10.6768

C -1.13281 0.319885 0.380004 0.172050 0.249969 0.688477 0.464202 0.998848 0.345703 0.239257 0.379882 0.436523 0.442626 0.366699 0.614258 -0.671850

P 2.30657 1.78220 1.80788 2.17125 2.18261 2.01174 0.911551 0.002227 1.62090 1.84911 1.76391 1.78873 1.42529 1.70112 1.03530 2.69489