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Thermal Units

Thermal Unit Selection Thermal Unit Selection Tables

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Thermal Unit Selection NOTE: For thermal unit selection tables for other devices including obsolete devices, consult the Customer Care Center at 1-888-778-2733.

Table 16.367: Thermal Unit Selection

Thermal Unit Selection Table Number Hand Reset Melting Alloy

Controller

Standard Trip (20)

QuickTrip (10)

SlowTrip (30)

Starter Type

Type

Series [1]

Class 2510 2512 8908

Size

Manual Starters FHP

43 [2]

F

A

FHP

—

—

Manual Starters (Small Enclosure)

[3] [3] [3] [3] [3] [3] [3] — — — [3] [3] [3] [3] [3] — — — — — — — — — — — — — — — — — — — — — — —

M–0 M–1 M–1P M–0 M–1 M–1P

1 1 1 2 2 2

72 72 72 73 73 73 — — — — — 74 74 — 75 — — 83 — 74 74 75 75 — — — — — — — — — — — — — — —

M, T

2510

A

Manual Starters (Large Enclosure) DC Magnetic Starters

2510 2511 2512 8925 7135 7136 7735 7736

M, T

A

C,D

65

— 1, 2 — 3 — 4 — 5

E F G

9

10 12

EC&MCrane Control Product

A (8536 only)

8536 8904 [4] (Starter InOwn Enclosure)

17 [2]

B, C 00

A, B

SA SB

00

13 13 13 41 56 18 54 49 59 21 66 15 67

A A A A A A A

0 1

8933 8998 8999 (Model 3 Control Center) I-LINE ® andQMB Motor Starter Centers

16 NEMA AND DEFINITE PURPOSE CONTACTORS AND STARTERS

SC

1P

SD SE SF SG SH SC

2 3 4 5 5 6

76 [5]

134 [3][5]

B [6] A, B

1Fusible

A

AC Magnetic Starters (Small Enclosure)

1 Circuit Breaker

2Fusible

SD

A

8998 8999 (Model 4 Control Center)

58 [7]

2 Circuit Breaker 3 Small Enclosure 3 Large Enclosure

76 [5] 76 [5]

134 [3][5] 133 [3][5]

16

SE SF SG SH

A A A A A A A A A B A C A

68 [7]

4 5 6 1 2 3 4 5

61 24 20

109 104 110 111 112 113 103 114 135 145 146

SC [8] SD [8] SE [8] SF [8] SG [8] SH [8]

1COMPAC6

8998 (Model 5 and Model 6 MCCs)

5CT

6

20–30A

8911

DPSG

40A 50A

(table continued on the next page) NOTE: For thermal unit selection tables for other devices, including obsolete devices, consult the Customer Care Center at 1-888-778-2733.

[1] Series letters listed refer to the marking on the nameplate of the basic openstyle starter. When the starter comes in a controller containing other devices, the controller may have a different series letter marked on the enclosure nameplate. [2] Type A thermal units for full-load currents lower than those listed in this table are available. For complete information, consult Customer Care Center at 1-888-778-2733. [3] This device will accept Type SB slow trip (Class 30) thermal units. For selection, see page 16-134. [4] Small enclosure tables apply for Class8904 non-combination and non-reversing starters. For combination and reversing Class8904 starters, refer to the large enclosure selections, index above. [5] FormY81 must be specified to use quick trip (Class 10) or slow trip (Class 30) thermal units on Size 3 starters. [6] Divide the motor FLC by 60, and use this quotient to select the appropriate thermal units. [7] Use for autotransformer starters (fusible and circuit breaker). [8] Refers to the Type number of the starter in the MCC, not the Type number of the MCC.

16-135

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