Section 1—General Information - 0612CT0101 PowerPacT M P R ComPacT Catalog

Introduction

PowerPacT™ M-, P-, and R-frame and ComPacT™ NS630b–NS3200 electronic trip molded case circuit breakers are designed to protect electrical systems from damage caused by overloads, short circuits, and ground faults. All circuit breakers are designed to open and close a circuit by nonautomatic means and to open the circuit automatically on a predetermined overcurrent. Electronic trip molded case circuit breakers use an electronic trip system to signal the circuit breaker to open automatically.

The PowerPacT M-frame (800 A frame size), P-frame (1200 A frame size) and R-frame (3000 A frame size) circuit breakers are dual rated to UL489 and IEC 60947-2. The ComPacT NS630b–NS1600 (1600 A frame size) and NS1600b–NS3200 (3200 A frame) circuit breakers are rated to IEC 60947-2 only.

M-frame molded case circuit breakers are equipped with a basic electronic trip system, which is available in an adjustable amperage trip unit capable of 300–800 A settings, or a fixed amperage device capable rated at 400 or 600 A. P-frame, R-frame and NS630b–NS3200 molded case circuit breakers are available with either a basic ET 1.0I electronic trip system or with a more advanced MicroLogic™ trip system. Electronic trip motor circuit protectors (trip system ET 1.0M), which trip on short circuit only, and automatic molded case switches, which trip at a predetermined self-protection level only, are also available for special applications. All of these circuit breakers are available labeled as Square D™ or Schneider Electric™.

For information on other Square D brand PowerPacT molded case circuit breakers, see the Class 611 catalog: PowerPacT H-, J-, and L-Frame Circuit Breakers.

Features and Benefits

M-frame, P-frame, R-frame and NS630b–NS3200 electronic trip circuit breakers:

Provide overload and short-circuit protection
Are true RMS sensing devices
Provide means to manually disconnect power to the circuit
Provide enhanced coordination by their adjustability
Provide high interrupting ratings and withstand ratings

Circuit breakers with MicroLogic trip units can also:

Provide integral equipment ground-fault protection or alarm
Provide communications
Provide power monitoring
Provide protective relaying functions
Provide zone-selective interlocking (ZSI), which can reduce damage in the event of a fault

Specifications

Electronic trip molded case circuit breakers have a molded case made of a glass-reinforced insulating material (thermal set composite resin) that provides high dielectric strength. These circuit breakers:

Are available in either dual-rated Underwriters Laboratory^® (UL^®) / International Electrotechnical Commission^® (IEC^®) or IEC-only constructions
Are also Canadian Standard Association^® (CSA^®) and Association of the Electrical Sector^® (ANCE^®) certified (dual-rated UL/IEC circuit breakers only)
Are manufactured in unit-mount, I-Line™ and drawout (P-frame and NS630b–NS1600) constructions
Are available with either type ET or MicroLogic electronic tripping systems
Provide optional power monitoring, communications, protective relaying, integral ground-fault protection for equipment and zone-selective interlocking functions
Share common tripping of all poles
Can be mounted and operated in any position*
Are equipped with an externally-accessible test port for use with hand-held and full-function test sets
Are available in motor circuit protector and automatic molded case switch constructions
Can be reverse connected, without restrictive LINE and LOAD markings
Meet the requirements of National Electrical Code^® (NEC^®) Sections 240.6 by providing a means to seal the rating plug and trip unit adjustments

Codes and Standards

M-, P- and R-frame, and NS630b–NS3200 electronic trip circuit breakers and switches are manufactured and tested in accordance with the following standards:

Standards

M-Frame, P-Frame and R-Frame Circuit Breakers	P- and R-Frame Switches	NS630b–NS3200 Circuit Breakers	NS630b–NS3200 Switches
UL 489* IEC Standard 60947-2 CSA C22.2 No 5 Federal Specification W-C-375B/GEN NEMA AB1 NMX J-266 UTE, VDE, BS, CEI, UNE, CCC	UL 489* IEC Standard 60947-3 CSA C22.2 No 5 Federal Specification W-C-375B/GEN NEMA AB1 NMX J-266 UTE, VDE, BS, CEI, UNE	IEC Standard 60947-2 Federal Specification W-C-375B/GEN NEMA AB1 UTE, VDE, BS, CEI, UNE	IEC Standard 60947-3 Federal Specification W-C-375B/GEN NEMA AB1 UTE, VDE, BS, CEI, UNE

Circuit breakers should be applied according to guidelines detailed in the NEC and other local wiring codes.

Circuit Breaker Ratings

Interrupting Rating

The interrupting rating is the highest current at rated voltage the circuit breaker is designed to interrupt under standard test conditions. Circuit breakers must be selected with interrupting ratings equal to or greater than the available short-circuit current at the point where the circuit breaker is applied to the system (unless it is a branch device in a series rated combination). Interrupting ratings are shown on the front of the circuit breaker. For grounded B phase interrupting ratings, see Data Bulletin 2700DB0202.

UL/IEC Circuit Breaker Interrupting Ratings

Circuit Breaker*	UL/CSA Rating (60 Hz)				IEC 60947-2 Rating (50/60 Hz)
	3 Phase			Grounded B Phase (1Ø-3Ø)	240 Vac		380/415 Vac
	240 Vac	480 Vac	600 Vac	240 Vac 2P	Icu	Ics	Icu	Ics
MG	65 kA	35 kA	18 kA	65 kA	50 kA	25 kA	35 kA	20 kA
MJ	100 kA	65 kA	25 kA	65 kA	65 kA	35 kA	50 kA	25 kA
PG	65 kA	35 kA	18 kA	65 kA	50 kA	25 kA	35 kA	20 kA
PJ	100 kA	65 kA	25 kA	65 kA	65 kA	35 kA	50 kA	25 kA
PK	65 kA	50 kA	50 kA	65 kA	50 kA	25 kA	50 kA	25 kA
PL	125 kA	100 kA	25 kA	65 kA	125 kA	65 kA	85 kA	45 kA
RG	65 kA	35 kA	18 kA	35 kA	50 kA	25 kA	35 kA	20 kA
RJ	100 kA	65 kA	25 kA	100 kA	65 kA	35 kA	50 kA	25 kA
RK	65 kA	65 kA	65 kA	65 kA	85 kA	65 kA	70 kA	55 kA
RL	125 kA	100 kA	50 kA	125 kA	125 kA	65 kA	85 kA	45 kA

IEC Only Circuit Breaker Interrupting Ratings (50/60 Hz)

Circuit Breaker	Interrupting Rating	220/240 Vac		380/415 Vac		440 Vac		500/525 Vac		660/690 Vac
Circuit Breaker	Interrupting Rating	Icu	Ics	Icu	Ics	Icu	Ics	Icu	Ics	Icu	Ics
Electrically Operated
NS630b–NS1600	N	50 kA	37 kA	50 kA	37 kA	50 kA	37 kA	40 kA	30 kA	30 kA	22 kA
NS630b–NS1600	H	70 kA	35 kA	70 kA	35 kA	65 kA	32 kA	50 kA	25 kA	42 kA	21 kA
NS630b–NS1000	L	150 kA	150 kA	150 kA	150 kA	130 kA	130 kA	100 kA	100 kA	—	—
Manually Operated
NS630b–NS1600	N	85 kA	50 kA	50 kA	50 kA	50 kA	50 kA	40 kA	40 kA	30 kA	30 kA
NS630b–NS1600	H	85 kA	52 kA	70 kA	52 kA	65 kA	48 kA	50 kA	37 kA	42 kA	31 kA
NS630b–NS1000	L	150 kA	150 kA	150 kA	150 kA	130 kA	130 kA	100 kA	100 kA	—	—
NS630b–NS800	R	200 kA	200 kA	200 kA	200 kA	200 kA	200 kA	100 kA	100 kA	75 kA	75 kA
NS1600b–NS3200	N	85 kA	65 kA	70 kA	52 kA	65 kA	65 kA	65 kA	65 kA	65 kA	65 kA
NS1600b–NS3200	H	125 kA	94 kA	85 kA	64 kA	85 kA	64 kA	—	—	—	—

Application Ratings

The voltage rating is the highest voltage for the electrical system on which the circuit breaker can be applied. The frequency rating indicates the system frequency for which the circuit breaker is intended. The withstand rating is used to improve system coordination by maximizing the current level at which the circuit breaker trips with no intentional delay. The withstand rating is the level of RMS symmetrical current that a circuit breaker can carry in a closed position for a stated period of time.

Voltage, Frequency and Withstand Ratings

Circuit Breaker	Voltage Rating	Frequency Rating	Withstand Rating at 480 Vac*
MG, MJ	600 Vac	60 Hz (UL), 50/60 Hz (IEC)	10 kA (0.5 sec)
PG, PK	600 Vac	60 Hz (UL), 50/60 Hz (IEC)	25 kA (0.5 sec)
PJ	600 Vac	60 Hz (UL), 50/60 Hz (IEC)	10 kA (0.5 sec)
PL	480 Vac	60 Hz (UL), 50/60 Hz (IEC)	10 kA (0.5 sec)
R-frame (RG, RJ, RK, RL)	600 Vac	60 Hz (UL), 50/60 Hz (IEC)	32 kA (3 sec)
NS630b–NS1600 N Interrupting Rating	690 Vac	50/60 Hz (IEC)	19.2 kA (1 sec)
NS630b–NS1600 H Interrupting Rating	690 Vac	50/60 Hz (IEC)	19.2 kA (1 sec)
NS630b–NS1000 L Interrupting Rating	690 Vac	50/60 Hz (IEC)	N/A
NS630b–NS1000 R Interrupting Rating	690 Vac	50/60 Hz (IEC)	N/A
NS1600b–NS3200 N Interrupting Rating	690 Vac	50/60 Hz (IEC)	32 kA (3 sec)
NS1600b–NS3200 H Interrupting Rating	440 Vac	50/60 Hz (IEC)	32 kA (3 sec)

Ampere Rating (Continuous Current Rating)

The ampere rating (or continuous current rating) (I_r) is the maximum current that a circuit breaker can carry. The sensor size (I_n) is the maximum ampere rating for a specific circuit breaker and is based on the size of the sensor plug inside the circuit breaker. This value is printed below the trip unit on the sensor plug. See Sensor Plugs for more information.

NOTE: The maximum ampere rating a circuit breaker family can carry is called the frame size. Sensor size is less than or equal to frame size.

The ampere rating of a type ET electronic trip circuit breaker is equal to the current sensor size (I_n).

The ampere rating of a MicroLogic electronic trip circuit breaker is determined by the mathematical equation:

Ampere Rating = Sensor Size x Rating Plug Setting (I_r = I_n x Rating Plug Setting)

The rating plug varies the circuit breaker ampere rating as a function of its sensor size. Rating plugs have nine dial settings; the multiplier values corresponding with each setting are printed on the rating plug.
The maximum setting range is 0.4–1.0 x I_n.

Enclosure Sizes

All type ET electronic trip UL/IEC M-frame, P-frame and R-frame circuit breakers are available as standard rated circuit breakers. MicroLogic electronic trip UL/IEC circuit breakers are also available in 100% rated constructions. Because the additional heat generated when applying circuit breakers at 100% of continuous current rating, the use of specially designed enclosures and 194°F (90°C) rated wire sized per the 167°F (75°C) NEC chart is required.

Circuit breakers with 100% rating can also be used in applications requiring only 80% continuous loading.

Minimum Enclosure Sizes for Fixed-Mounted Circuit Breakers

Circuit Breaker Rating	Enclosure Dimensions (h x w x d)		Ventilation Area
Circuit Breaker Rating	3P Circuit Breaker	4P Circuit Breaker	Top	Bottom
M-Frame, ≤ 800 A, Standard Rated	51.9 x 20.25 x 7.75 in. (1318.3 x 514.4 x 196.9 mm)	51.9 x 23.01 x 7.75 in. (1318.3 x 584.4 x 196.9 mm)	—	—
P-Frame, ≤ 800 A, 100% Rated P-Frame, ≤ 1200 A, Standard Rated	51.9 x 20.25 x 7.75 in. (1318.3 x 514.4 x 196.9 mm)	51.9 x 23.01 x 7.75 in. (1318.3 x 584.4 x 196.9 mm)	—	—
P-Frame, ≤ 1200 A, 100% Rated	62.25 x 23 x 14.75 in. (1581.2 x 584.2 x 374.7 mm)	62.25 x 25.76 x 14.75 in. (1581.2 x 654.2 x 374.7 mm)	16.5 in. (10.645 mm)	16.5 in. (10.645 mm)
R-Frame, Standard Rated*	30 x 21 x 7 in. (762 x 533 x 178 mm)	30 x 25.5 x 7 in. (762 x 648 x 178 mm)	—	—
R-Frame, 100% Rated*	30 x 21 x 7 in. (762 x 533 x 178 mm)	30 x 25.5 x 7 in. (762 x 648 x 178 mm)	40.25 in. (26.000 mm)	40.25 in. (26.000 mm)

Operating Conditions

Temperature

To meet the requirements of the UL489 Standard, molded case circuit breakers are designed, built and calibrated for use on 50/60 Hz ac systems in a 104°F (40°C) ambient environment. Electronic trip circuit breakers, however, are designed to react only to the magnitude of the current flowing through the circuit breaker and are inherently ambient insensitive. Both UL/IEC and IEC-only circuit breakers may be operated at temperatures between -13°F and +158°F (-25°C and +70°C). For temperatures other than 104°F (40°C), the circuit breakers must be re-rated as shown.

Temperature Re-rating Values

Maximum Ambient Temperature
°F °C	158 70	140 60	122 50	104 40	86 30	77 25	68 20	50 10	32 0	14 -10	-4 -20	13 -25	-22 -25
Current	0.75	0.83	0.92	1.00	1.07	1.11	1.14	1.21	1.27	1.33	1.39	1.42	1.44

Altitude

Circuit breakers are suitable for use at altitudes up to 13,100 ft. (4000 m). For altitudes higher than 6560 ft. (2000 m), circuit breakers must be derated as shown.

Altitude Derating Values Per ANSI C37.20.1 Table 10

Altitude	≤ 6,600 ft. (≤ 2,000 m)	8,500 ft. (2,600 m)	13,000 ft. (3,900 m)
Voltage	1.00	0.95	0.80
Current	1.00	0.99	0.96

Extreme Atmospheric Conditions

PowerPacT circuit breakers have successfully passed the tests defined below for extreme atmospheric conditions.

Dry cold and dry heat:

IEC 68-2-1—Dry cold at -67°F (-55°C)
IEC 68-2-2—Dry heat at 185°F (+85°C)

Damp heat (tropicalization)

IEC 68-2-30—Damp heat (temperature 131°F (55°C) and relative humidity of 95%, condensing)
IEC 68-2-52 level 2—Salt mist

The materials used in the PowerPacT circuit breakers will not support the growth of fungus and mold.

Vibration

PowerPacT circuit breakers meet IEC 60068-2-6 Standards for vibration.

2 to 13.2 Hz and amplitude 0.039 in. (1 mm)
13.2 to 100 Hz constant acceleration

Storage Temperature

Circuit breakers with trip units without LCD displays may be stored in the original packaging at temperatures between -58°F (-50°C) and +185°F (+85°C).

For circuit breakers with trip units with LCD displays, this range is -40°F (-40°C) to +185°F (+85°C).

Trip System


ET Electronic Trip Unit	MicroLogic Electronic Trip Unit

The trip system causes the circuit breaker to open automatically under overload, short-circuit or equipment ground-fault conditions. Electronic trip circuit breakers give the customer more versatility to achieve coordination with features such as adjustable instantaneous pickup and high withstand ratings.

The type ET and the MicroLogic trip systems consist of current sensors, a microprocessor-based trip unit, and a tripping coil. The tripping coil is a flux transfer solenoid that requires no external power source. All type ET and MicroLogic protective functions are completely fault powered.

MicroLogic Trip System

Features found in MicroLogic electronic trip circuit breakers, such as universally interchangeable rating plugs, adjustable long-time pickups and 100% ratings also provide capacity for future growth.

The integral equipment ground-fault sensing capabilities available with MicroLogic trip systems mean that there are fewer parts and pieces to purchase, mount and wire. These capabilities include integral ground-fault protection for equipment, which causes the circuit breaker to trip when a ground fault is detected, as well as integral ground-fault alarm, which does not trip the circuit breaker but sends an alarm when a ground fault is detected.

Certain MicroLogic trip systems also offer the customer true power management system solutions through communication. These trip units can communicate with other circuit breakers in the system and also with a power monitoring system. Communication is by Modbus^™ and does not require proprietary software.

Communication between trip units allows zone-selective interlocking (ZSI) between circuit breakers at different levels in the system. ZSI reduces fault stress by allowing the upstream circuit breaker closest to the fault to ignore its preset delay time and trip without any intentional delay on a short circuit or ground fault. For more information on ZSI, see data bulletin Reducing Fault Stress with Zone-Selective Interlocking.

Communication with a power monitoring system through a communications network allows a ground fault to be reported without interrupting power to the system. It also allows the power monitoring system to remotely report power usage, current flow, and trip history.

Instantaneous OFF Feature

MicroLogic 5.0 and 6.0 Standard, A, P, and H electronic trip units provide the unique ability to turn the instantaneous tripping function OFF. Turning off the instantaneous trip function increases the current level at which the circuit breaker will trip with no intentional delay to the level of the short-time withstand rating. This current level is typically much higher than any of the pickup levels provided by the adjustable instantaneous feature. Therefore, using the instantaneous OFF feature improves coordination by allowing the user to take advantage of the circuit breaker withstand rating.

Motor Circuit Protectors

An instantaneous trip version of the electronic trip circuit breaker is also available for motor circuit protection. These motor circuit protectors comply with NEC requirements for providing short-circuit protection when installed as part of a Listed combination controller having motor overload protection.

Electronic trip motor circuit protectors are similar in construction to type ET electronic trip circuit breakers. They are designed as disconnect devices for use in combination with motor starters. These motor circuit protectors provide short-circuit protection only and have an adjustable amperage pickup so they can be set to open instantaneously at current values slightly above the motor starting inrush current. This setting coordinates the pickup time-current response of the motor circuit protector with the overload relay of the motor starter to give the best possible protection.

Current interrupting ratings for these UL Recognized components are established in combination with motor starters and properly-sized overload relays and contactors.

Automatic Molded Case Switches

The M-, P- and R-frame circuit breakers are also available in automatic molded case switch construction. Automatic switches are similar in construction to electronic trip circuit breakers, except that the switches open instantaneously at a factory-set non-adjustable trip point calibrated to protect only the molded case switch itself. Because of their molded case construction, they are more compact than conventional disconnect switches and accept electrical accessories for added flexibility.

Molded case switches are intended for use as disconnect devices only. UL489 requires molded case switches to be protected by a circuit breaker or fuse of equivalent rating. Molded case switches are labeled with their appropriate withstand ratings. The withstand rating of a switch is defined as the maximum current at rated voltage that the molded case switch will withstand without damage when protected by a circuit breaker with an equal continuous current rating.

P- and R-Frame Withstand Ratings

Voltage	Withstand Rating*
	M-Frame Circuit Breakers			P-Frame Circuit Breakers			R-Frame Circuit Breakers
	J	K	L	J	K	L	J	K	L
240 Vac	100 V	—	—	100 kA	65 kA	125 kA	—	65 kA	125 kA
480 Vac	65 V	—	—	65 kA	50 kA	100 kA	—	50 kA	100 kA
600 Vac	23 V	—	—	25 kA	50 kA	25 kA	—	50 kA	50 kA

Internal Operating Mechanism

Manually-Operated Circuit Breakers

M-frame, P-frame, R-frame and NS630b–NS3200 manually-operated circuit breakers have a single operating handle that acts directly through the operating mechanism against the contact blades. Multi-pole circuit breakers have a common trip bar for positive action of all poles on manual and automatic operation. These circuit breakers have a trip-free mechanism that allows them to trip even though the operating handle may be restricted (by a handle operating mechanism or padlock attachment) in the I/ON position. If not restricted, the operating handle moves to a position between I/ON and O/OFF when the circuit breaker is tripped.

The face of the manually-operated circuit breaker is marked with standard ON/OFF and international I/O markings to indicate handle position. In addition, the O/OFF portion of the circuit breaker handle is color coded green.

Electrically-Operated Circuit Breakers

P-frame and NS630b–NS1600 circuit breakers are also available with a two-step stored-energy mechanism which can be charged manually or using a motor. The closing time is less than five cycles. Closing and opening operations can be initiated by remote control or by push buttons on the front cover. An O-C-O (open-close-open) cycle is possible without recharging. Electrically-operated circuit breakers include a motor, shunt trip, and shunt close of the same voltage plus an overcurrent trip switch (SDE).

The face of electrically-operated circuit breakers is also marked ON/OFF and I/O, and equipped with a position indicator to show contact position.

Push-to-Trip Button

The push-to-trip button located on the face of each manually-operated circuit breaker is a standard feature on these circuit breakers. This allows the user to manually trip the circuit breaker without risking exposure to live parts. During normal on-off operation, the handle opens and closes the circuit breaker contact but does not exercise the tripping mechanism.

Use the push-to-trip button to:

Exercise the circuit breaker mechanism
Check the auxiliary and alarm switch circuits

Circuit Breaker Mounting and Connections

Circuit Breaker	Unit-Mount Construction		I-Line Construction	Drawout Construction
Circuit Breaker	Cable Connection	Bus Connection	I-Line Construction	Drawout Construction
M-Frame	X	X	X	—
P-Frame	X	X	X	X
R-Frame	X*	X	XThrough 1200 A, 100% rated only.*	—
NS630b–NS1250	X	X	—	X
NS1600–NS3200	—	X	—	—

Unit-Mount Circuit Breakers

Unit-mount M-frame, P-frame, R-frame and NS630b–NS3200 circuit breakers are individually-mounted using supplied mounting screws. The four mounting screws are inserted through mounting holes molded into the circuit breaker case and threaded into the circuit breaker mounting enclosure. To properly support the circuit breaker, all four mounting screws must be used.

Unit-mount M-frame, P-frame and NS630b–NS1250 circuit breakers can be ordered with mechanical line and load side lugs. The standard lugs can be removed for the installation of compression-type lugs or bus connections. All lugs are UL Listed for their proper application and marked for use with aluminum and copper (Al/Cu) or copper only (Cu) conductors. Lugs suitable for copper and aluminum conductors are made of tin-plated aluminum. Lugs suitable for use with copper conductors only are made of copper.

See individual frame sections for frame-specific connection information.


M-Frame Unit-Mount	P-Frame Unit-Mount	Electrically Operated P-Frame Unit-Mount	R-Frame Unit-Mount

I-Line Circuit Breakers

M-frame circuit breakers through 800 A and P-frame and R-frame circuit breakers through 1200 A are available in I-Line construction for easy installation and removal in I-Line panelboards and switchboards. I-Line circuit breakers use “blow-on” type line side connectors. In case of a short circuit, increased magnetic flux causes the plug-on connectors of the circuit breaker to tighten their grasp on the panelboard or switchboard bus bars. The I-Line connectors and circuit breaker mounting bracket are integral parts of I-Line circuit breakers and cannot be removed or replaced. I-Line circuit breakers come with mechanical load side lugs.


M-Frame I-Line	P-Frame I-Line	R-Frame I-Line

Drawout Circuit Breakers

P-Frame Drawout
Circuit Breaker

P-frame manually-operated circuit breakers and switches are also available in drawout construction. The drawout assembly mechanism allows the circuit breaker to be racked in four positions (connected, test, disconnect or withdrawn).

P-frame cradles are ordered separately and are available with factory and field-installed accessories. See Section 10 —P-Frame Cradles and Cradle Accessories for details.

Catalog Numbering System

The M-frame, P-frame, R-frame and NS630b–NS3200 circuit breakers and cradles follow a “smart” catalog numbering system. The following tables are intended as a tool to decipher existing catalog numbers. They are not intended for use in building catalog numbers, as some combinations may not be available. To build a catalog number, please see the Digest, the Product Selector or contact the local field office.

M-Frame, P-Frame and R-Frame Circuit Breaker Catalog Numbers

NOTE: Not all options are available on all frames.

Catalog Number for M-, P- and R-Frame (UL/IEC Dual-Rated) Circuit Breakers

Field Position	Field Description	Options	Description
1	Brand Name	(blank)	Square D
1	Brand Name	N	Schneider Electric (Formerly Merlin Gerin brand)
2	Circuit Breaker Frame	M	800 A Max.
		P	1200 A Max.
		R	3000 A Max.
3	Interrupting Rating	G	35 kA @ 480 Vac
		J	65 kA @ 480 Vac
		K	P-Frame: 50 kA @ 600 Vac R-Frame: 65 kA @ 600 Vac
		L	100 kA @ 480 Vac
4	Connection	F	No Lugs
		L	Lugs on Both Ends
		M	Lugs on I/ON End
		P	Lugs on O/OFF End
		A	I-Line
		D	Drawout (Not Available on M and R Frames)
5	Poles	2	2P
		3	3P
		4	4P
6	Voltage Rating	4	480 V
6	Voltage Rating	6	600 V
7–9	Ampere Rating	###	Circuit Breaker Rating (120 = 1200 A)
7–9	Ampere Rating	000	Automatic Switch Value
10	Standard or 100% Rated	(none)	Standard Rated
10	Standard or 100% Rated	C	100% rated

11–14	Circuit Breaker Trip System	(none)	ET1.0 (M-Frame)
		(none)	ET1.0I (P-Frame, R-Frame)
		U31	MicroLogic 3.0 Trip Unit
		U33	MicroLogic 5.0 Trip Unit
		U41	MicroLogic 3.0A Trip Unit
		U43	MicroLogic 5.0A Trip Unit
		U44	MicroLogic 6.0A Trip Unit
		U63	MicroLogic 5.0P Trip Unit
		U64	MicroLogic 6.0P Trip Unit
		U73	MicroLogic 5.0H Trip Unit
		U74	MicroLogic 6.0H Trip Unit
	Automatic Switch Trip System*	S60	600 ANot available on R-frame devices.*
		S80	800 ANot available on R-frame devices.*
		S10	1000 ANot available on R-frame devices.*
		S12	1200 A
		S16	1600 A
		S20	2000 A
		S25	2500 A
		S30	3000 A
	Motor Circuit Protector Trip System	M68	1200–10000 ANot available on R-frame devices.*
		M69	1500–10000 ANot available on R-frame devices.*
		M70	1800–10000 ANot available on R-frame devices.*
15	Rating Plug	A–H	See Table 80.
16-17	Modbus Communication	E1	Modbus BCM
18	I-Line Phasing	See Digest, Product Selector.
For Factory-Installed Accessories, see Product Selector.

NS630b–NS3200 Circuit Breaker Catalog Numbers

Catalog Number for NS630b–NS3200 (IEC-Rated) Circuit Breakers

Field Position	Field Description	Options	Description
1	Brand Name	(Blank)	Square D
1	Brand Name	N	Schneider Electric
2	Circuit Breaker Frame	R	3200 A Max.
2	Circuit Breaker Frame	P	1600 A Max.
3	Interrupting Rating	N	Standard Interrupting Rating
		H	High Interrupting Rating
		L	Current Limiting
		R*	200 kA Interrupting
4	Connection	F	No lugs
		L	Lugs on Both Ends
		M	Lugs on I/ON End
		P	Lugs on O/OFF End
		D	Drawout
		S	Rear Connected
5	Certification	E	IEC
6	Poles	3	3P
6	Poles	4	4P
7	Voltage Rating	4	440 Vac
7	Voltage Rating	6	690 Vac
8–10	Ampere Rating	###	Circuit Breaker Rating (120 = 1200 A)
8–10	Ampere Rating	000	Switch Value
11–14	Circuit Breaker Trip System	U32	MicroLogic 2.0 Trip Unit
		U33	MicroLogic 5.0 Trip Unit
		U42	MicroLogic 2.0A Trip Unit
		U43	MicroLogic 5.0A Trip Unit
		U44	MicroLogic 6.0A Trip Unit
		U63	MicroLogic 5.0P Trip Unit
		U64	MicroLogic 6.0P Trip Unit
		U73	MicroLogic 5.0H Trip Unit
		U74	MicroLogic 6.0H Trip Unit
	Non-Automatic Switch Trip System	Z63	630 A
		Z80	800 A
		Z10	1000 A
		Z12	1250 A
		Z16	1600 A
15	Rating Plug	R–T	See Table 79.
16–17	Modbus Communications	E1	Modbus BCM
For Accessories, see Product Selector.

Cradle Catalog Numbers

P-frame and NS630b–NS1600 manually-operated circuit breakers and switches are available in drawout construction (factory installed only). The circuit breakers may be ordered using the circuit breaker catalog numbering systems described above. The cradles must be ordered separately.

Cradle Catalog Number

Field Position	Field Description	Options	Description
1	Cradle	C	Cradle
2	Frame Size	S	P-Frame 3P
2	Frame Size	D	P-Frame 4P
3	Brand/Certification	L	Square D Brand UL/IEC Dual-Rated
3	Brand/Certification	G	Schneider Electric IEC Rated Only
4	Circuit Breaker Interruption Rating	E	P-Frame “G”,“J”, “K”, or “L” Interrupting Rating
5	Cradle Connections Top Terminals	V	Rear-Connected T Vertical (RCTV)
		H	Rear-Connected T horizontal (RCTH)
		E	Front-Connected Flat (FCF)
6	Cradle Connections Bottom Terminals	V	Rear-Connected T Vertical (RCTV)
		H	Rear-Connected T Horizontal (RCTH)
		E	Front-Connected Flat (FCF)
7	Shutters and Associated Options	9	None (Standard for P-Frame Circuit Breakers)
7	Shutters and Associated Options	3	Shutters with Padlocking Provision
8	Circuit Breaker Mismatch and Cradle Interlock	A	See Product Selector.
9	Metering CT	X	Not Applicable on P-Frame Cradle
10	Cradle Secondary Disconnects Wiring	X	See Product Selector.
11–18	Miscellaneous Cradle Options	X	See Product Selector.

Testing Requirements

UL, NEMA, CSA, and NMX requirements

The UL, NEMA, CSA and NMX labels on a circuit breaker indicate that the circuit breaker meets the requirements of UL Standard 489, NEMA Standard AB-1, CSA Standard C22.2 No. 5 and NMX standard J266. The labels also mean that the production procedure is monitored by UL, CSA and ANCE inspectors to ensure continued compliance to these standards. These requirements include the following tests:

200% Overload Calibration—each pole of the circuit breaker must trip within a specified time limit when carrying 200% of its continuous current rating.
135% Overload Calibration—with all poles connected in series, the circuit breaker must trip within a specified time limit while carrying 135% of its continuous current rating.
Overload—the circuit breaker must make and break 600% of its continuous current rating at rated voltage. Circuit breaker frame sizes 125–1600 A must perform 50 operations at 600%. Circuit breaker frame sizes 2000–2500 A must perform 25 operations at 600%.
Temperature Rise—while carrying 100% of rated current and mounted in open air, temperature rise on a wiring terminal must be within specified limits. For 100% rating, the circuit breaker is mounted in an enclosure.
Endurance—UL489 requires that the circuit breaker must complete, at minimum, the following number of operations:

Endurance Operations

Frame Size	Operations
Frame Size	With Current*	Without Current
1200–2500	500	2000

Calibration—both the 200% and 135% overload calibration tests are repeated after endurance testing.
Short Circuit—the circuit breaker shall be subjected to test currents based on voltage rating and frame size, with the type and number of operations based on the number of poles, frame rating and voltage rating. Example: a 3P, 600 Vac, 2500 A frame circuit breaker is subjected to one 20 kA single-phase closing of the circuit on the circuit breaker per pole and one 30 kA three-phase closing of the circuit on the circuit breaker for a total of seven short circuit tests.
Trip Out—the 200% thermal calibration test is repeated following the short-circuit tests.
Dielectric—the circuit breaker must withstand, for one minute, twice its rated voltage plus 1000 V:
- Between line and load terminals with the circuit breaker in the open, tripped and OFF positions.
- Between terminals of opposite polarity with the circuit breaker closed.
- Between live parts and the overall enclosure with the circuit breaker both open and closed.

No conditioning of the circuit breaker can take place during or between tests. There can be no failure of functional parts at the conclusion of the sequences.

After qualifying a set of circuit breakers to the standard tests, a manufacturer can have additional circuit breaker samples tested on higher than standard available fault currents. The following performance requirements apply:

200% Overload Calibration—each pole of the circuit breaker must trip within a specified time limit when carrying 200% of its continuous current rating.
Short-Circuit Test—with the load side terminals connected by 10-inch lengths of specified cable (or a shorting bar), the circuit breaker is exposed to a short-circuit current for a set time interval. After safe interruption, the circuit breaker is reset and closed again on the short circuit.
250% Overload Calibration—each pole of the circuit breaker must trip within a specified time limit when carrying 250% of its continuous current rating.

Dielectric Withstand—the circuit breaker is subjected to twice the voltage rating at which the interrupting test was conducted, but not less than 900 V.
- Between line and load terminals with the circuit breaker in the tripped and in the OFF positions.
- Between terminals of opposite polarity with the circuit breaker closed.
- Between live parts and the overall enclosure with the circuit breaker both open and closed.

When the sample circuit breakers pass these tests, circuit breakers of the same construction can be marked or labeled with the current interrupting rating for the higher fault currents.

IEC Requirements

The IEC markings on a circuit breaker indicates that the circuit breaker meets the requirements of IEC Standard 60947-2 for circuit breakers and 60947-3 for automatic switches. These requirements include the following tests:

IEC Test Sequence

Sequence	Category of Devices	Tests
General Performance Characteristics (Sequence 1)	All Circuit Breakers	Tripping Limits and Characteristics Dielectric Properties Mechanical and Electrical Endurance Overload Dielectric Voltage Withstand Temperature Rise 145% Calibration (3 poles in series or 3-phase test)
Rated Service Short-circuit Breaking Capacity (Ics) (Sequence 2)	All Circuit Breakers	Rated service short circuit breaking capacity (O-t-CO-t-CO) Electrical Endurance (5% of with Current Operations of Sequence 1) Dielectric Voltage Withstand Temperature Rise 145% Calibration (3 poles in series or 3-phase test)
Rated Ultimate Short-circuit Breaking Capacity (Icu) (Sequence 3)	Circuit Breakers of Utilization Category A Circuit Breakers of Utilization Category B	200% Calibration (Each Pole Separately) Rated Ultimate Short Circuit Breaking Capacity (O-t-CO) Dielectric Voltage Withstand 250% Calibration (Each Pole Separately)
Rated Short-time Withstand Current (Icw) (Sequence 4)	Circuit Breakers of Utilization Category B	200% Calibration (Each Pole Separately) Rated Short-Time Withstand Current Temperature Rise Short-Circuit Breaking Capacity at Maximum Short-Time Withstand Current (O-t-CO) Dielectric Voltage Withstand 200% Calibration (Each Pole Separately)
Combined Sequence	Circuit Breakers of Utilization Category B: When Icw = Ics Replaces Sequences 2 and 4 When Icw = Ics = Icu Replaces Sequences 2, 3 and 4	200% Calibration (Each Pole Separately) Rated Short-Time Withstand Current Icw Rated Service Short-Circuit Breaking Capacity at Ics (O-CO-CO) at Maximum Relay Temp. 145% Calibration (3 Poles in Series or 3-Phase Test) Dielectric Voltage Withstand Temperature Rise 200% Calibration (Each Pole Separately)
Individual Pole Short-Circuit Test Sequence (Annex H)	Circuit Breakers for Use in IT Systems	Individual Pole Short-Circuit Breaking Capacity Dielectric Voltage Withstand 250% Calibration (Each Pole Separately)