18
2-4 AP P LICATION AND SE LE CTION
Th e con t act or s sh ou ld be select ed a ccor din g t o t h e t ypes of t h eir loads. Th e loads a re classified in IE C60947 as shown
in t he followin g t a ble, a n d in clu de t h ose of t h e t r a nsfor mer, con den ser, et c. in ot h er ca t egor y. Ta ble 13 pr ovides
r efer en ces for t h e select ion of cont a ct ors.
Ta ble 13. Refer ence for selection
Ca t egor y
Typica l a pplica t ion s
Select ion
AC1
N on -in duct ive or sligh tly indu ct ive
loa d, r esist a n ce fu r n aces
Refer t o 2-4-3.
AC2
Slip-r in g m ot or s :
St a rt in g , plu ggin g
Th e sa me as par a gr aph 24-l
u n less plu ggin g is included.
AC3
Squ irr el-ca ge mot or s :
St a rt in g, swit ch in g off m otors
du r in g r u n n in g
Refer t o 2-4-1.
IE C
60947-4-1
AC4
Squ irr el-ca ge mot or s:
St a rt in g, plu ggin g, in ch in g
Refer t o 2-4-2.
DC loa d
Refer t o 2-4-4.
St a r-delt a st a rt er
Refer t o 2-4-5.
Con denser loa d
Refer t o 2-4-6.
Open in g/closin g of pr im a r y side of
t r a nsfor mer
Refer t o 2-4-7.
2-4-1 Applica t ion of AC3
(1) St a n dar d for select ion
Wh en con tr ollin g t h e m ot or by t h e con t act or , t h e loa d cu rren t sh own in F ig. 16 flows, so a cont a ct or cor r espon din g
t o t h is cu r ren t is select ed. Th e k ey poin t s of t h e select ion ar e given in Ta ble 14 accor din g t o th e m a in it em s.
F ig. 16 Mot or cu r r en t
Summary of Contents for H100C
Page 2: ......
Page 9: ...5 Fig 1 H35 Horizontal Plunger type Fig 2 H300C Link structure ...
Page 36: ...32 Fig 28 ...
Page 54: ......
