Optional Accessories; Current Transformer - Delta SVG300A43A-11 Quick Star

3-2 Optional Accessories

3-2-1 Current Transformer

Delta's Static VAR Generator requires 3 current transformers (or CT), which use the rated frequency
for standard transformers of 400Hz (precision better than 1%); CT's rated output value must be
5A.Users can select suitable CT from table 3-1 CT model selection to install.
Notes on CT model selection:
(1) Be aware of the installation direction when installing CT's. The phase sequence of CT detection
signals (K, L) cannot be swapped, the Static VAR Generator must use 3 CT's in three-phase
three-wire devices, installed separately in R-phase, S-phase, and T-phase. The arrows point
towards load. The 3 CT's must all be in the same direction, any fixed in the wrong direction will
lead to errors in the detection of current values.
(2) The ratio of rated primary / secondary current must be selected reasonably, the recommended
primary current is 1.2-times (actual rated current);
(3) The primary / secondary isolation voltage is 0.66V; select 5A as the secondary current;
Current ratio
Model
(A)*
CT-A0300 300A/5A
CT-A0600 600A/5A
Magnified figure of the terminals (*
Primary current
Output power
1
(A)
300
600
Secondary
Accuracy
(VA)
2.5VA 1%
5VA 1%
3-3
Specifications
3
)
Dimension
Dimension (mm)
code
Outer
frame 115*110*46
A
Inner 51*50*32
frame
Outer 115*110*46
A
frame 51*50*32