Delta SVG300A43A-11, Quick Star

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3-6
*
3.
CT
signal detection
terminal,
(K, L)
labeled in the figure, is removable so that customers can easily replace
the wiring.
(4) Crimp terminal connectors must be used for CT's terminal lines, and securely tightened K(S1), L(S2)
terminal wirings
Terminal: K1,L1, K2,L2, K3,L3,
Wire diameter 24~10AWG
Pin insulated terminal Blade insulated terminal
Applicable terminal
block
(used with figure 3-1
position A)
W: 2.7mm
L: 14mm
W: 2.8mm
L: 10mm
(5) There is a limit on the length of CT cable; cables that are too long will cause the CT to decrease in
accuracy.
(6) When installing multiple parallel units, the length of each CT cable must be identical.
CT cable selection
wire gauge(mm
2
/AWG)
Impedance
( Ω )
Cable length
(meters/feet)
Minimum load required by
CT (VA)
Recommendation
4/#12 5.1 50/164 >6.3 10VA
6/#10 3.4 50/164 >4.2 7.5VA
The formula for the CT's fixed maximum load is: cable length (M) = [(VA)-1.25} / [25*(ohm/M)]
(VA): 25*(ohm/M)* M+1.25; (ohm/M): impedance
Range of cable length
wire gauge(mm
2
/AWG)
Impedance
( Ω )
Cable length
(meters/feet)
Minimum load required by
CT (VA)
6/#10 3.4 <44m/ 147 5
6/#10 3.4 <73m/ 243 7.5
6/#10 3.4 <102m/ 340 10
6/#10 3.4 <161m/ 537 15
6/#10 3.4 <338m/ 1127 30
4/#12 5.1 <29m/ 97 5
4/#12 5.1 <49m/ 163 7.5
4/#12 5.1 <68m/ 227 10
4/#12 5.1 <107m/ 357 15
4/#12 5.1 <225m/ 750 30