Square D Digest 179

Non-Reversing

Type S Combination Starters

Class 8538, 8539 / Refer to Catalog 8538CT9701

www.se.com/us

Application Data

Table 16.143: Electronic Motor Circuit Protector (MCP) Selection by HP Ratings of Induction-type Squirrel-Cage Motors 3Ø, 60 Hz Voltages Full-Load (A) Suffix 200 Vac 230 Vac 460 Vac 575Vac .5–5 .5–7.5 .75–15 1–20 1.5–25 M71 5–10 5–15 10–30 15–40 14–42 M72 10–25 15–30 25–60 30–75 30–80 M73 20–40 25–50 50–100 60–125 58–130 M74 40–60 50–75 100–150 125–200 114–217 M75 NOTE: The MCP adjustable trip range is determined by the suffix of the circuit breaker catalog number. This table indicates the trip range which corresponds to a given suffix number. The MCP motor circuit protector should be adjusted to a level just above locked-rotor current of the motor. This setting will provide optimum overcurrent protection for the motor. For more information on MCP instantaneous-trip circuit breakers, refer to the MCP circuit breaker section of this catalog. Table 16.145: Class 8538—UL Listed Short Circuit Ratings NEMASize NEMAFuse Class Enclosure

Table 16.142: Class 8539—UL Listed Short Circuit Ratings Motor Circuit Protector Type NEMASize Enclosure

AIC at 480 Vac (RMS) AIC at 600 Vac (RMS)

Standard [63] Standard [63] Standard [63]

0, 1

100,000 100,000 65,000

35,000 50,000 18,000

2 thru5

6

Table 16.144: Class 8539, UL Listed Short Circuit Ratings Thermal Magnetic Circuit Breaker Type NEMASize Enclosure

16 NEMA AND DEFINITE PURPOSE CONTACTORS AND STARTERS

Available Amperes RMS Symmetrical

AIC at 480 Vac (RMS) AIC at 600 Vac (RMS)

Standard [64] Standard [64]

5,000

0–3 0–3 0–2 0–2 4–5 4–5

ClassHorK

Standard [63] Standard [63] Standard [63]

0, 1

100,000 100,000 65,000

35,000 50,000 18,000

100,000

ClassR/J

2 thru5

5,000

ClassHorK

Oversize Standard

6

100,000 10,000 100,000 18,000 100,000

ClassR/J

Standard [64] Standard [64] Standard [64] Standard [64]

ClassHorK

ClassR/J

6 6

ClassHorK

ClassR/J

NOTE: The combination starter selection tables on page 16-52 to page 16-54 are suitable for motors with locked-rotor current letters according to NEC Table 430-7(b) as listed in Table 16.146. For other motors, a special thermal-magnetic circuit breaker with adjustable magnetic trip settings for the specific motor is required. When ordering for these special applications, specify the motor horsepower, voltage, frequency, full-load current, and code letter (or locked rotor current) to help ensure proper protection.

Table 16.146: 2: Motor Code Letter Table Horsepower

Motor Code Letters

1/2or less 3/4–1-1/2

A-L A-K A-J A-H A-G A-F

2–3 5–25

30–125

150ormore

Table 16.147: Terminals

Control Terminals On Magnetic Starter

Power Terminals On Magnetic Starter

Line Terminals on Disconnect

NEMA Size

Type

WireRange

Wires Per Terminal

Wires Per Terminal

Typeof Lug

Typeof Lug Pressure Wire BoxLug

Typeof Lug

WireRange

WireRange

Switch

Circuit Breaker

(1) 14-3/0 Al or Cu

0 & 1 SB & SC Box Lug 14–1/0 Cu/Al

14–8Cu

1 or 2 Pressure Wire

16–12Cu

2

Pressure Wire Pressure Wire Pressure Wire

(1) 14-3/0 Al or Cu

16–12Cu

2

14–4Cu

1

2

SD Box Lug 14–1/0 Cu/Al

(1) 14-3/0 Al or Cu

BoxLug

16–12Cu

2

3

SE Box Lug 14–1/0 Cu/Al

14–0Cu

1

(1) 4-4/0 Al or Cu ( JLL Breaker 150 A - 175 A ) (1) 3/0 - 350 MCM Al or Cu ( JLL Breaker 200 A - 250 A ) (1) 2 - 500 MCM Al or (1) 2 - 350 MCM Cu (DJL36400 Breaker) (2) 2/0 - 500 MCM Al or (2) 2/0 - 350 MCM Cu (DLL36600 Breaker) (1) 3/0 - 350 MCM Al or (1) 3/0 - 350 MCM Cu (JLL36250 Breaker) (2) 2/0 - 500 MCM Al or (2) 2/0 - 350 MCM Cu (DJL36600 Breaker, DLL Breaker) (1) 2 - 600 MCM Al or (1) 2 - 350 MCM Cu (DJL36400 Breaker) (3) 3/0 - 500 MCM Al or (3) 3/0 - 350 MCM Cu (MJL36800 Breaker ) (3) 3/0 - 500 MCM Al or (3) 3/0 - 350 MCM Cu (PLL34080M68 Breaker)

BoxLug

4

SF Box Lug 6–300 MCM Cu/Al

8–250 MCM Cu

1

16–12Cu

2

Pressure Wire

BoxLug

5

SG Box Lug One 4–500 MCMCu

4–500 MCM Cu

1

16–12Cu

2

16–12Cu [66]

250–500 MCM Cu [65]

Parallel Groove

2

1 or 2 Pressure Wire

6

SH BoxLug

—

[63] Standard enclosure includes: NEMA 1 and 4X stainless, and 12/3R. [64] Standard enclosure includes non-oversize NEMA 1 and 4X stainless, and 12. [65] Order Class 9999 Type SCU6 parts kit to convert power terminals to accept sizes 2/0–300 MCM wire. [66] Terminal block range limited to 16–14.

16-57

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