Motor Circuit Protection Selection

Class 614

Motor Circuit Protection Selection

PowerPacT H- and J-frame electronic Motor Circuit Protectors (MCP) are magnetic-only instantaneous-trip circuit breakers. They are designed to offer short circuit protection and are National Electrical Code (NEC) compliant when installed as part of a combination controller having motor overload protection. MCP circuit breakers accept the same accessories and terminals as the equivalent thermal-magnetic circuit breakers.

Determine the hp rating from the nameplate of the motor. Select a MCP with an ampere rating recommended for the hp and voltage involved. When using the automatic settings the MCP microprocessor automatically adjusts the trip settings for both current and time to align with the start-up characteristic for the motor type, whether it is a standard or energy-efficient motor. This includes a dampening means to accommodate a transient motor in-rush current without nuisance tripping of the circuit breaker.

H- and J-Frame Electronic Motor Circuit Protectors (MCP)

Frame	Sensor Rating	Full Load Amperes Range	Adjustable Instantaneous Trip Range	Suffix	J (See SCCR Cat. No. Table Below)	L (See SCCR Cat. No. Table Below)	R (See SCCR Cat. No. Table Below)
H-Frame	30 A	1.5–25 A	9–325 A	M71	HJL36030M71	HLL36030M71	HRL36030M71
	50 A	14–42 A	84–546 A	M72	HJL36050M72	HLL36050M72	HRL36050M72
	100 A	30–80 A	180–1040 A	M73	HJL36100M73	HJL36100M73	HRL36100M73
	150 A	58–130 A	348–1690 A	M74	HJL36150M74	HLL36150M74	HRL36150M74
J-Frame	250 A	114–217 A	684–2500 A	M75	JJL36250M75	JLL36250M75	JRL36250M75

Maximum Rating or Setting of Motor Protective Devices ^[1]

Type of Motor		Percentage of Full-load Current
Type of Motor		Setting	Not to Exceed^[2]
A, B, C, D	Standard	800%	1300%
B, E	Energy Efficient	1100%	1700%

MCP Selection by HP Ratings^[3] of Induction-type Squirrel-Cage and Wound-Rotor Motors^[4]

3Ø60 Hz Voltages^[5]				Full-Load Amperes	Suffix
200 Vac	230 Vac	460 Vac	575 Vac	Full-Load Amperes	Suffix
.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

Short Circuit Current Rating (SCCR)

Tested to meet NEC and UL508A requirements for short circuit current ratings as part of an approved combination controller.

Short Circuit Current Ratings (SCCR)

Contactor/Starter	Interrupting Rating
	J			L
	200–240 Vac	480 Vac	600 Vac	200–240 Vac	480 Vac	600 Vac
Tesys D-line and F-line	100 kA	65 kA	25 kA	125 kA	100 kA	50 kA
NEMA Type S	100 kA	65 kA	25 kA	125 kA	100 kA	50 kA

See www.us.schneider-electric.us for specific ratings and combination ID numbers.

Accessories see PowerPacT™ Circuit Breaker Accessories

Lugs see Mechanical Lugs

Dimensions see Molded Case Circuit Breaker Dimensions

Enclosures see Enclosures

To select combination starters and motor controllers using MCP’s Meeting NEC Article 430, refer to Section 16.

H-, J-Frame Motor Circuit Protectors

Application of PowerPacT™ H-Frame and J-Frame Electronic Motor Circuit Protectors (MCP)

Horsepower Rating of Induction-Type Squirrel-Cage and Wound-Rotor Motors 3Ø 60 Hz					NEC Full Load Amperes	PowerPacT H-Frame and J-Frame Electronic MCP
Starter Size	200 Vac	230 Vac	480 Vac	575 Vac	NEC Full Load Amperes	PowerPacT H-Frame and J-Frame Electronic MCP
00				1/2	0.9 A	HJL36030M71 and HLL36030M71 1/2–10 hp
			1/2		1.1 A
				3/4	1.3 A
			3/4	1	1.7 A
			1		2.1 A
		1/2			2.2 A
				1-1/2	2.4 A
	1/2				2.5 A
				2	2.7 A
			1-1/2		3 A
		3/4			3.2 A
			2		3.4 A
	3/4				3.7 A
				3	3.9 A
		1			4.2 A
	1				4.8 A
			3		4.8 A
		1-1/2			6 A
				5	6.1 A
		2			6.8 A
	1-1/2				6.9 A
0			5		7.6 A
	2				7.8 A
				7-1/2	9 A
		3			9.6 A
	3		7-1/2	10	11 A
1			10		14 A		HJL36050M72 and HLL36050M72 10–25 hp
		5			15.2 A
				15	17 A
	5				17.5 A
			15		21 A
		7-1/2		20	22 A
	7-1/2				25.3 A
2			20	25	27 A
		10			28 A
				30	32 A	HJL36100M73 and HLL36100M73 15–50 hp
	10				32.2 A
3			25		34 A
			30		40 A
				40	41 A
		15			42 A
	15				48.3 A
			40	50	52 A
		20			54 A
	20			60	62 A		HJL36150M74 and HLL36150M74 30–100 hp
			50		65 A
		25			68 A
			60	75	77 A
	25				78.2 A
4		30			80 A
	30				92 A
			75		96 A
				100	99 A
		40			104 A
	40				120 A	JJL36250M75 and JLL36250M75 50–150 hp
			100		124 A
5				125	125 A
		50			130 A
				150	144 A
	50				150 A
		60			154 A
			125		156 A
	60				177.1 A
			150		180 A
		75		200	192 A
	75				221 A
			200		240 A
		100			248 A
*Shaded area is not covered by J-frame electronic motor circuit protector.

Section 7: Miniature and Molded Case Circuit Breakers

Section 7: Miniature and Molded Case Circuit Breakers

Motor Circuit Protection Selection

Class 614