Square D Digest 179

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Non-Reversing

Type S Combination Starters

Class 8538, 8539 / Refer to Catalog 8538CT9701

www.se.com/us

Accessories—Interlocks and Control Transformers A one or twopole electrical interlock can be added to the disconnect switch or circuit breaker. So if a separate control circuit is used, the magnetic starter can be de-energized when the disconnect is switched to the Off position. See Table 16.148 for proper interlock selection. For electrical ratings of disconnect and circuit breaker interlocks, see Table 16.149. An electrical interlock may also be factory installed in either a disconnect switch or circuit breaker combination starter. Specify FormY74 for single-pole or FormY75 for two-pole interlocks. Table 16.148: Disconnect Switch and Breaker Interlocks Class Type SPDT (Y74) DPDT (Y75) Class 9999 Type Class 9999 Type 8538 [67] SB, SC, SD (Series B) R6 R7

16 NEMA AND DEFINITE PURPOSE CONTACTORS AND STARTERS

SD (Series C)

R43 R45

R44 R46

SB, SC (Series C) SE, SF (Series A) SE (Series B & C) SF (Series B & C)

8538, 8738

R41 R39 R35 R26

R42 R40 R36 R27

8539, 8739 SB, SC, SD, SE, SF, SG (Series K)

SBA, SCA, SBG, SCG (Series D and above)

8538 8538 8738 8738 8538 8738

TC11 TC10 TC10 TC11 TC10 TC10 TC10

TC21 TC20 TC20 TC21 TC20 TC20 TC20

SBAS8, SCAS8, SBGS8, SCGS8 (Series D and above) SBAS8, SCAS8, SBGS8, SCGS8 (Series E and above) SBA, SCA, SBG, SCG (Series E and above) SDA, SDA [67] , SDG, SDG [67] (Series D and above)

SDA, SDG (Series E and above)

8538, 8738 SEA, SEG (Series D and above)

Table 16.149: Disconnect Switch and Breaker Interlock Electrical Ratings Class 9999 Type R6, 8, 26, 35, 39, 41, 43, 45, TC10, & TC11

Class 9999 Type R7, 9, 27, 36, 40, 42, 44, 46 & TC 20, 21

AC—50 or 60 Hz

Maximum Current

Make

Break

Continuous Carrying Current (A)

Make

Break

Continuous Carrying Current (A)

Volts

(A)

120 240 480 600

40 20 10 8

15 10

15 15 15 15

120 240 480 600

30 15

3450 3450 3450 3450

3 1.5 0.75 0.6

345 345 345 345

10 10 10 10

6 5

7.5 6

NOTE: 9070TF transformers are now standard in Series K combination starters. Internal Auxiliary Switch— Circuit breakers can be supplied with a factory installed auxiliary switch for remote indication of an open and/or tripped or a closed breaker. One (specify FormY741 ) or two (specify FormY751 ) auxiliary switches can be supplied. The switches are supplied with normally open and normally closed circuits with a common connection. Contacts must be used on the same polarity and are rated 15 A at 240 Vac. The auxiliary switches are located internally and are furnished with 19-20 inch long leads. Alarm Switch— The alarm switch only operates when the breaker is tripped. It is used to actuate bell alarms and warning lights. The alarm switch is factory installed only (specify FormY742 ) and consists of a single pole single throw switch which is normally open except when the breaker is tripped. The contacts are rated 4 A at 240 Vac. This switch is located in the breaker and is supplied with 19-20 inch long leads. Transformer Selection— Space and drilling are provided in all disconnect switch and circuit breaker combination starters in NEMA® 1 and 4X stainless and polyester for the field addition (or factory installation) of a Class 9070 control circuit transformer and Class 9999 Type SFR4 fuse holder. This kit can be either panel mounted or side mounted on the Type S starter. For standard control transformer selection in combination starters, see . For secondary fuse holder, order 9080PF1. Fuse Block Mounting Brackets— The standard capacity transformer, Class 9070 Type T100, for the Size 0 and 1 starters mounts to the right of the magnetic starter. Standards— Most combination starters and forms are UL Listed in file E152395, Category NKJH, and CSA File CR 584.

Table 16.150: Control Transformer Selection

Additional Capacity

Standard Capacity

50VA (Form FF4T10)

100VA (Form FF4T11)

200VA (Form FF4T12)

(Form FF4T)

Starter Type

NEMA Size

Class9070 Type [68]

TF300 [69][70] TF300 TF500

0, 1 SB&

TF150 TF150 TF200 TF300

TF200 TF200 TF300 TF500

SC TF100 SD TF100 SE TF150 SF TF300

2 3 4

T500

TF100 and 8501XO20

TF150 and 8501XO20 EO3FS2 and T100

TF300and 8501XO20 EO3S2and TF200

N/A

SH EO3S2 is standard

[67] Class 8538 type numbers ending in suffix S8 . [68] Complete the contactor or starter Class and Type with the voltage code. See the transformer section of the current Digest for information. [69] Requires oversized enclosure. (Size 2 reversing enclosure.) [70] Available in standard enclosure with Mag-Gard™ circuit-breaker and non-fusible disconnect switch. Requires oversized enclosure with thermal-magnetic circuit-breakers and fusible disconnect switches. (Size 2 reversing enclosure.)

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