Armstrong 4280 - 8 Fuse and Wire Recommendation

installation &
operating instructions
Design Envelope 4200h & 4280
End Suction Horizontal Pumping Units
44
8.0 fuse and wire recommendation
Armstrong recommends ul 248-12 Listed Class rk1 current-
limiting and Fast-acting fuses for upstream protection of instal-
lations within the nec/ul jurisdiction.
Example fuses suitable for upstream protection are detailed
below. The Bussmann ktr-r (200v) and the kts-r (40 0v )
fuses are class rk1 and csa certified to c22.2 No. 248.12
Bussmann ktx-r fuses oer 200 kA (vac rms)
interrupting rating.
All cabling must comply with national and local regulations on
cable cross-sections and ambient temperature.
permanent magnet motors recommended maximum fuse (ul compliance)
Input
voltage
(VAC)
Rated
power
Class rk1 fast- acting,
current- limiting fuse (ul
248-12, csa c22.2 no.
248.12) Bussmann
Fusible discon-
nect switch (ul
98, ul 489)
Bussmann
Class cc fast- acting,
current- limiting fuse
(ul 248-4, csa c22.2
no. 248.4) Bussmann
Fusible discon-
nect switch (ul
98, ul 489)
Bussmann
Class j fast-acting,
current-limiting fuse
(ul 248-8, csa c22.2
no. 248.8) Bussmann
hp kW
200-230
1 0.75 ktn-r-10 rdf300cc-3 ktk-10 rdf30j-3 jks-10
1.5 1.1 ktn-r-10 rdf300cc-3 ktk-10 rdf30j-3 jks-10
2 1.5 ktn-r-15 rdf300cc-3 ktk-15 rdf30j-3 jks-15
3 2.2 ktn-r-20 rdf300cc-3 ktk-20 rdf30j-3 jks-20
5 4.0 ktn-r-30 rdf300cc-3 ktk-30 rdf30j-3 jks-30
7.5 5.5 ktn-r-50 - - rdf60j-3 jks-50
10 7. 5 ktn-r-60 - - rdf60j-3 jks-60
380-480
1 0.75 kts-r-6 rdf300cc-3 ktk-6 rdf30j-3 jks-6
1.5 1.1 kts-r-6 rdf300cc-3 ktk-6 rdf30j-3 jks-6
2 1.5 kts-r-10 rdf300cc-3 ktk-10 rdf30j-3 jks-10
3 2.2 kts-r-10 rdf300cc-3 ktk-10 rdf30j-3 jks-10
4 3.0 kts-r-15 rdf300cc-3 ktk-15 rdf30j-3 jks-15
5 4.0 kts-r-20 rdf300cc-3 ktk-20 rdf30j-3 jks-20
7.5 5.5 kts-r-25 rdf300cc-3 ktk-25 rdf30j-3 jks-25
10 7.5 kts-r-30 rdf300cc-3 ktk-30 rdf30j-3 jks-30