![Siemens Reyrolle 7SR5 Скачать руководство пользователя страница 322](http://html.mh-extra.com/html/siemens/reyrolle-7sr5/reyrolle-7sr5_manual_380692322.webp)
87T > 87T Common >
(Note that the above settings produce ICTOUT = 1.00)
87T Zone Inputs
<all>
87T-HB Select
Operate
87T > 87T-BD >
Gn HB2 Element
Enabled
Gn HB2 Bias
Cross
Gn HB2 Setting
0.15 ⋅ I
Gn HB5 Element
Disabled
Gn Element
Enabled
Gn Setting
0.3 ⋅ I
rated
(0.3 ⋅ ICT
OUT
Gn S1
0.3x (OLTC = +10 % to -20 %)
Gn S1L
4 ⋅ I
rated
(1/0.14 ⋅ 0.5 = 3.6 ⋅ ICT
OUT
Gn S2 Type
Line (Default value)
Gn S2
1.5x (Default value)
Gn Delay
0 s
Gn External Fault
2.4 ⋅ I
rated
Gn Clearance Time
0.3 s
87T > 87HS >
Gn Element
Enabled
Gn Setting
8 ⋅ I
rated
(> I
3PH THRU FAULT
i.e. 1/0.14 = 7.14 ⋅ ICT
OUT
Gn Delay
0 s
Configuration > Binary Outputs > Output Matrix >
87BD
BOn, Ln
87HS
BOn, Ln
Configuration > Binary Outputs > Trip Config >
W1 CB Trip Contacts
BOn
W2 CB Trip Contacts
BOn
The Effects of An In Zone Earthing Transformer
The in zone earthing transformer is a source of zero-sequence fault current. An earth fault on the delta side of
the transformer external to the differential protection zone will cause zero sequence currents to flow in the
CTs on the delta side of the transformer without corresponding current to flow in the line CTs on the star side
of the transformer. If these zero sequence currents are allowed to flow through the differential elements they
may cause undesired tripping.
Protection and Automation Functions
5.22 87T Transformer Differential Protection
322
Reyrolle 7SR5, Transformer Protection Device, Device Manual
C53000-G7040-C015-1, Edition 11.2019
Содержание Reyrolle 7SR5
Страница 8: ...8 Reyrolle 7SR5 Transformer Protection Device Device Manual C53000 G7040 C015 1 Edition 11 2019 ...
Страница 24: ...24 Reyrolle 7SR5 Transformer Protection Device Device Manual C53000 G7040 C015 1 Edition 11 2019 ...
Страница 132: ...132 Reyrolle 7SR5 Transformer Protection Device Device Manual C53000 G7040 C015 1 Edition 11 2019 ...
Страница 142: ...142 Reyrolle 7SR5 Transformer Protection Device Device Manual C53000 G7040 C015 1 Edition 11 2019 ...
Страница 338: ...338 Reyrolle 7SR5 Transformer Protection Device Device Manual C53000 G7040 C015 1 Edition 11 2019 ...