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I.L. 40-201.9
Zone 2 Phase (Z2P) unit should operate for all of the above tests. The trip times should be greater than 100
milliseconds.
For Zone 3 trips outside Zone 2 reach, the following quantities should be applied:
The REL 352 should trip and the tripping time should be 1.0 ±5% seconds. Zone 3 phase (Z3P) unit should op-
erate for all of the above tests.
For forward external faults apply the following quantities:
The REL 352 should not trip.
The following quantities simulate reverse phase-to-phase faults:
I-8
V
AB
Va = 35 ∠0
Ia = 5 ∠-45
Vb = 35 ∠-120
Ib = 5∠+135
Vc = 69 ∠+120
Ic = 0
BC
Va = 69 ∠0
Ia = 0
Vb = 35 ∠-120
Ib = 5∠-165
Vc = 35 ∠+120
Ic = 5∠+15
CA
Va = 35 ∠0
Ia = 5 ∠-105
Vb = 69 ∠-120
Ib = 0
Vc = 35 ∠+120
Ic = 5∠+75
V
AB
Va = 35 ∠0
Vb = 35 ∠-120
Vc = 69 ∠+120
BC
Va = 69 ∠0
Vb = 35 ∠-120
Vc = 35 ∠+120
CA
Va = 35 ∠0
Vb = 69 ∠-120
Vc = 35 ∠+120
V
AB
Va = 35 ∠0
Vb = 35 ∠-120
Vc = 69 ∠+120
BC
Va = 69 ∠0
Vb = 35 ∠-120
Vc = 35 ∠+120
Power Automation and Protection Division
I
Z app
6.12∠75
6.12∠75
6.16∠75
I
Ia = 4 ∠-45
Ib = 4∠+135
Ic = 0
Ia = 0
Ib = 4∠-165
Ic = 4∠+15
Ia = 4∠-105
Ib = 0
Ic = 4∠+75
I
Ia = 4 ∠+135
Ib = 4∠-45
Ic = 0
Ia = 0
Ib = 4∠+15
Ic = 4∠-165
REL 352 Version 1.00
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