TCI HGP - Manual (Page 24)

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CP KIT OPTION (0) HGP IOM Manual 24
Table 1a – Fuse Specifications for HGP 480 Volt Models
HG7 Rating
(HP)
kVar
Max Branch Circuit
Fuse
Max Line Fusing
(J or T) (J, T or L)
5 1.3 20 30
7.5 3 20 30
10 3 20 30
15 5 30 30
20 6 30 60
25 8 30 60
30 10 30 60
40 15 30 60
50 15 30 80
60 20 50 100
75 25 50 125
100 30 60 150
125 40 80 200
150 45 100 225
200 60 125 300
250 75 150 375
300 90 175 450
350 105 200 500
NOTE: Customers must provide line fusing to complete SCCR 100KA rating.
Selection of Contactors
As an option, you can include contactors to remove the trap circuit from the filter under no load or
light load conditions. Review the impedance of the line reactor, this isolates the trap circuit capacitors
from line transients, removing the need for special capacitor rated contactors in this application.
Contactors in the trap circuit can be selected based on the rated trap circuit current using the UL
general purpose rating of your intended contactors.
Options
TCI fuses the trap circuit to isolate the trap circuit in the case of component damage. Some failures
could leave an unbalanced load on the trap, which can damage additional parts. A fuse in the trap
circuit can be selected based on trap circuit rated current.
SCCR Issues
If you need an SCCR rating greater than the default values of components: For example 10 kA for
terminal blocks or 5 kA for contactors, pay attention to component selection and circuit fusing.
Contactors need to be protected by line or trap fusing based on their published SCCR ratings. For trap
circuits less than or equal to 40 HP, the incoming line circuit protection of Class J or Class T rated less
than or equal to 60 A will result in 10 kA being supplied to the panel, allowing any type of filter
capacitors to be used. Larger filter kits are provided with dry capacitors, which are exempt from SCCR
calculations.