21
2-4-2 Applica t ion of AC4 (Applica t ion of Cases In cludin g In ch in g an d P lu ggin g)
In equ ipm en t a n d m a ch iner y which in clu de inch in g a n d plu ggin g (n egat ive-ph ase bra k in g), m ak e a n d break of la r ge
st ar t in g r ush cu rr en t of t h e mot or will occur fr equ en t ly. Ca t egor y AC4 is a pplied for su ch usa ge. Applica tion of AC4
is sh own in Ta bles 1 a n d 2 in pa ge 12 of t he ca t alogu e.
2-4-3 Applica t ion of AC1 (Applica t ion t o AC Resist a n ce Loa d)
Ca t egor y AC1 is a pplied when usin g a r esist a nce loa d wh ich does n ot necessit at e consider at ion of ru sh cur r ent a t
st ar t in g such a s t he inca ndescent ligh t , elect r ic h ea t er , etc.
Applica t ion of AC1 is shown in Ta ble 3 in pa ge 13 of t h e cat a logu e.
2-4-4 Applica t ion of DC Load
Th e br eak in g ca tegor y of DC loa d becom es fa r m or e sever e in com par ison wit h AC loa d. H owever , con t act or ca n be
a pplied as sh own in Ta ble 4 in pa ge 13 of t he ca t alogu e.
2-4-5 Applica t ion for St a r-Delt a St ar t er s
Delt a m ot or is st a r -con n ect ed du rin g st ar t in g, a n d r edu ces st a rt in g cu r ren t a nd t or que t o on e-t h ir d of fu ll-volt a ge
st ar t in g va lu es.
(1) Loads a pplied t o st a r-delt a st ar t er s a nd elect r ica l en dur a n ce of st ar t er
Ta ble 15. Load a nd elect rica l endu r a nce
Loa d
E xa m ple of load
E lect rica l endu r a nce
u n loa ded st a rt
m a ch in e t ools, la t h e, gen era l in dust r ia l ma ch ines, et c.
500,000
squ a re t or que
vor t ex pum ps, t u r bine pu m ps, fa ns, blowers,
deh ydr a t or s, cent r ifu ga l deh ydr at ors, et c.
50,000
(2) Kin ds of st a r -delt a st ar t er s
2 Con ta ct or s m eth od
P h a se-cu rr ent det ectin g m et hod
3 Cont a ct or s m et h od
St a r-delt a st a rt er
2 Con ta ct or s m eth od
Lin e-cu r r en t det ect in g m et h od
3 Cont a ct ors m et h od
(3) Com ponen t n um ber expla n at ion a n d sym bol expla n at ion
Ta ble 16.
N o.
N a me
Ma rk
N a me
2
Tim er
IM
Mot or
6
Con t a ct or for st a r
BS
P u sh bu t t on (s t a rt )
22
Cir cu it br eak er (F F B)
BSS
P u sh bu t t on (s t op)
42
Con t a ct or for delt a
a
N orm a lly open con ta ct
49
Th er m a l over loa d r ela y
b
N orm a lly closed cont a ct
52
Con t a ct or for in su la t ion
E F
F u se
Summary of Contents for H100C
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