Specific CTs
Overview
The 7SR46 Argus relay is compatible with 6 specific CT 5P80 types giving a high range of operation.
Depending on the CT selected, the relay supports the following I
s
range (rated primary current):
Table 5-1 Specific CT Range
CT Type CT Ratio I
s
Range Relay Measurement Relay Continuous
Range
(2.5 ⋅ I
smax
)
CT01 7.2/0.075 8 A to 28 A 1.6 A to 560 A 70 A
CT02 14.4/0.075 16 A to 56 A 3.2 A to 1120 A 140 A
CT03 28.8/0.075 32 A to 112 A 6.4 A to 2240 A 280 A
CT04 57.6/0.075 64 A to 224 A 12.8 A to 4480 A 560 A
CT05 115.2/0.075 128 A to 448 A 25.6 A to 8960 A 1120 A
CT06 230.4/0.075 256 A to 896 A 51.6 A to 17920 A 2240 A
NOTE
7SR46 Argus relay is suitable with Specific CT (class 5P80) of the brand Eleq. All performance related claims
are as per the testing conducted with Eleq specific CT (class 5P80).
Technical Specifications
Parameter
Description
Insulation class E
Frequency 50 Hz to 60 Hz
Primary conductor - maximum cable diameter 45 mm (for CT01)
50 mm (for CT02, CT03, CT04, CT05, and CT06)
Conductor size (solid)
Conductor size (stranded)
6 mm
2
4 mm
2
Test winding rated current 0.288 A
CT class 5P80
Accuracy
The accuracy of the CT type is ≤± 5%
The CTs are able to measure with accuracy from 0.9 ⋅ I
smin
(3-phase currents).
CT Type
I
s
Range 0.9 ⋅ I
smin
CT01 8 A to 28 A 7.2 A
CT02 16 A to 56 A 14.4 A
CT03 32 A to 112 A 28.8 A
CT04 64 A to 224 A 57.6 A
CT05 128 A to 448 A 115.2 A
CT06 256 A to 896 A 230.4 A
5.2
5.2.1
Applications
5.2 Specific CTs
Reyrolle, 7SR46 Device, Manual 71
C53000-G7040-C103-1, Edition 10.2022
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