P12x/EN AP/A96
Application Guide
Page 70/80
MiCOM P120/P121/P122/P123
2 - Case of example No 3:
The R1 resistor maximum value (in Ohm) is defined by the following formula:
[
]
Ohm
R
I
U
U
8
,
0
1
R
Coil
min
min
a
−
−
×
<
Where:
Ua =
auxiliary voltage value (in this case a DC voltage; range is given on label
under
the top hinged cover. See table below).
Umin =
internal minimum voltage value needed for the opto logic input to operate.
Imin =
minimum current value needed for the opto logic input to operate.
R
coil
=
Trip coil resistance value.
Relay auxiliary voltage range (Ua)
24-60 VDC (ordering code P12xx00
A
xxxxx) 48-250
VDC/AC
(ordering code P12xx00
F
xxxxx)
R1 < (0,8 x Ua – 19,2)/0.035 – Rcoil
R1 < (0,8 x Ua – 19,2)/0.035 – Rcoil
The R1 resistor withstand value (in Watt) is defined below:
(
)
(
)
[ ]
W
R
1
R
U
2
,
1
2
P
2
Coil
a
1
R
+
×
×
>
NOTES:
– The presence of auxiliary relays, such as an anti-pumping system
for instance, in the trip circuit must be taken into account for the R1
resistance values specification.
– We consider that the maximum variations of the auxiliary voltage
value is ±20%.
Содержание MiCom P120
Страница 1: ...MiCOM P120 P121 P122 P123 Overcurrent Relays Version 11 Technical Guide P12X EN T A96...
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Страница 13: ...Introduction P12x EN IT A96 MiCOM P120 P121 P122 P123 INTRODUCTION...
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Страница 515: ...Communications P12x EN CT A96 MiCOM P120 P121 P122 P123 IEC 60870 5 103 MiCOM P120 P121 P122 P123 VERSION V11 A...
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Страница 537: ...Communications P12x EN CT A96 MiCOM P120 P121 P122 P123 DNP 3 0 DATABASE MiCOM P120 P121 P122 P123 VERSION V11 A...
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Страница 540: ...P12x EN CT A96 Communications DNP 3 0 Database Page 2 248 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 553: ...Commissioning and Maintenance P12x EN CM A96 MiCOM P120 P121 P122 P123 COMMISSIONING AND MAINTENANCE GUIDE...
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Страница 573: ...Connection Diagrams P12x EN CO A96 MiCOM P120 P121 P122 P123 CONNECTION DIAGRAMS...
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Страница 579: ...Commissioning Test Record Sheets P12x EN RS A96 MiCOM P120 P121 P122 P123 COMMISSIONING TEST RECORD SHEETS...
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