Brochure

© 1998 Square D All Rights Reserved
22
5/98
Thermal Unit Selection
Controller
Thermal Unit Selection Table Number
Hand Reset Melting Alloy Bimetallic
Starter Type Class Type
tSeries Size
Standard
Trip
Quick Trip
(10)
Slow Trip
(30)
Non-
Compensated
Compensated
AC
Magnetic
Starters
(Large
Enclosure)
8198 G, S .... .... 5 .... X .... 6
8536
(Starter Used in
Multi-Motor Panel)
8538 8904c
8539 8906
8606 8907
8630k 8920
8640q 8922
9089 8924
8647 8925
8650 8930
8736 8941
8738
8739
A (8536 only) B, C 00 14a .... .... .... ....
SA A, B 00 53 .... X 55 25
SB A 0 15 78 X 64 33
SC A 1 15 78 X 64 33
SD A 2 58 79 X 57 70
SE
A 3 16 80h 133hX51 37u
B 3 .... .... .... 141 ....
SF
A 4 61 81h .... 35 29u
B 4 .... .... .... 143 ....
SG A 5 24e .... .... 52 46
SH A 6 20 .... X 48 47
8810
8811
8812
CB, DB, SB, UB A 0 15 78 X 64 33
CC, DC, SC, UC A 1 15 78 X 64 33
CD, DD, SD, UD A 2 58 79 X 57 70
CE, DE, SE, UE A 3 16 80h 133hX51 37u
CF, DF, SF, UF A 4 61 81h .... 35 29u
SE B 3 .... .... .... 141 ....
SF B 4 .... .... .... 143 ....
CG, DG, SG, UG A 5 24e .... .... 52 46
CH, DH, SH, UH A 6 20 .... X 48 47
8940
WELL-GUARD
®
Control
WC, XC A 1 .... 78 .... .... 33
WD, XD, MD, RD, VD A 2 .... 79 .... .... 70
WE, XE, ME, RE, VE A 3 .... 80h .... .... 37‡
PF, WF, XF, MF, RF, VF A 4 .... 81h .... .... 29‡
XSG, NSG, MG, RG, VGa A 5 .... .... .... .... 46
XSH, VH A 6 .... .... .... .... 47
8911 DPSO A
20-30A 136 .... .... .... ....
40A 147 .... .... .... ....
50A 148 .... .... .... ....
AC
Magnetic
Part-
Winding
8998
8999
(Model 5 MCC)
SC# A
1 Fusible 127 .... .... .... 121
1 Circuit Breaker 130 .... .... .... 124
SD# A
2 Fusible 128 .... .... .... 122
2 Circuit Breaker 131 .... .... .... 125
SE# A
3 Fusible 129 .... .... .... 123
3 Circuit Breaker 132 .... .... .... 126
Separately
Mounted
Overload
Relays
9065
AF B 4(133A) .... .... .... 30 ....
AG A 5(266A) .... .... .... 36 ....
AR A 1(25A) .... .... .... 32 ....
AT A 2(45A) .... .... .... 60 ....
AU .... 3(86A) .... .... .... 50 ....
DA A 1(25a) .... .... .... 140u ....
GA A 2(60A) .... .... .... 139u ....
HA A 3(100A) .... .... .... 138u ....
JA A 4(180A) .... .... .... 137u ....
C A 1(25A) 44 82 X .... ....
F B 4(133A) 19 85h .... .... ....
G A 5(266A) 22 .... .... .... ....
MEO A (32A) 86 .... .... .... ....
SA
1(26A) 59 83 X 23 42
2(45A) 69 84 X 27 71
3(86A) 34 .... .... .... ....
4(133A) 28 .... .... .... ....
T A 2(45A) 31 .... X .... ....
U .... 3(86A) 40 .... .... .... ....
t Series letters listed refer to the marking on the nameplate of the basic open type starter. When the starter is supplied in a controller containing other devices, the controller may have a different series
letter marked on the enclosure nameplate.
f Small enclosure tables apply for Class 8904 non-combination and non-reversing starters. For combination and reversing Class 8904 starters refer to the large enclosure selections, index above.
k For Class 8630 starters divide the delta connected motor full load current by 1.73, and use this quotient to select thermal units.
q For Class 8640 starters use the full load current of each motor winding as a basis for thermal unit selection - normally one-half total motor current.
c Large enclosure tables apply for Class 8904 combination and reversing starters. For non-combination and non-reversing Class 8904 starters refer to small enclosure selections.
j Use for Autotransformer Starters (Fusible and Circuit Breaker).
u Order Type E thermal units by number from Square D Company.
a Type A thermal units for full load currents lower than those listed in this table are available. For complete information, consult local Square D field office.
h Form Y81 must be specified to use quick trip (Class 10) or slow trip (Class 30) thermal units on Size 3 starters and quick trip (Class 10) thermal units on Size 4 starters.
X This device will accept Type SB slow trip (Class 30) thermal units. For selection, see Page 18.
# Refers to type number of starter in MCC, not actual type number of MCC.
e For Y500 Device select Table 151, which uses “B” Thermal Units.