The ranges

The ABB moulded case circuit-breakers are proposed into eight sizes: T1, T2, T3, T4, T5, T6, T7 and S8. The rated ultimate breaking capacity under short-circuit, Icu, at 380/415V AC is available starting from 16kA up to 200kA.
To fulfil the various application requirements, they are available in the following ranges:

• Circuit-breakers for AC and DC power distribution
• Circuit-breakers for motor protection
• Circuit-breakers for applications up to 1000 V AC and DC
• Switch-disconnectors.

For each size, circuit-breakers are available in the three and four-pole versions. They are also equipped with a complete range of protection releases: thermomagnetic, magnetic only adjustable and electronic releases of the latest generation.
T1, T2, T3, T4, T5 and T6 circuit-breakers fitted with TMD and TMA thermomagnetic releases can also be used in direct current plants, with a field of application from 1A to 800 A and a minimum operating voltage of 24V DC.


The ABB SACE family of moulded case circuit breakers - Tmax and Isomax - is divided into different, perfectly integrated, ranges (Tmax T1B 1p, T1, T2, T3, T4, T5, T6 and T7, S8), able to cover a range of service currents from 1 to 3200 A.
The power distribution circuit breakers are available in the fixed, plug-in or withdrawable, three-pole and four-pole versions.
The Tmax T1 circuit breaker is also available in the single pole
Tmax T1B 1p version, with breaking capacities of 25 kA at 220/230 V AC.

Interchangeability of the releases
The Tmax T4,T5 and T6 circuit-breakers can be fitted either with thermomagnetic, magnetic only or electronic releases, which are all interchangeable with each other. In fact, thanks to the simplicity of their installation, the type of release can be replaced rapidly even by the end user, according to their requirements and needs: in this case, correct assembly remains the responsibility of the user himself. All this means increasing the flexibility of use of the circuit-breakers, with considerable savings thanks to the better rationalization of stock management.

Conformity with Standards
The moulded-case circuit-breakers and their accessories conform to the IEC 60947-2 international Standards and comply with the EC “Low Voltage Directives (LVD) no. 73/ 23 EEC” and “Electromagnetic compatibility Directives (EMC) no. 89/336 EEC”.
ABB SACE’s Quality System conforms to the ISO 9001 International Standard and to the equivalent European EN ISO 9001 and Italian UNI EN ISO 9001 Standards. The certifying Body is the Italian Shipping Register (RINA - QUACER): ABB SACE has reached its third qualification confirmation. The ABB SACE Test Room is accredited by SINAL.
The apparatus conforms to the prescriptions of the on-board installations and approvals by the major Shipping Registers are in progress.

		T1 1p	T1	T2	T3	T4	T5	T6	T7	S8
Iu	[A]	160	160	160	250	250 320	400 630	630 800 1000	800 1000 1250 1600	2000 2500 3200
N° of poles	No.	1	3-4	3-4	3-4	3-4	3-4	3-4	3-4	3-4
Ue AC 50-60Hz	[V]	240	690	690	690	690	690	690	690	690
Ue DC	[V]	125	500	500	500	750	750	750	-	-
Uimp	[kV]	8	8	8	8	8	8	8	8	8
Ui	[V]	500	800	800	800	1000	1000	1000	1000	1000
Test voltage (50 Hz, 1 min.)	[kV]	3	3	3	3	3.5	3.5	3.5	3	3
Breaking capacities
Icu AC 50-60 Hz 380/415 V	[kA]	25 (1)(2)	16 36	36 85	36 50	36 200	36 200	36 100	50 150	85 120
Icu AC 50-60 Hz 690 V	[kA]		3 6	6 10	5 8	20 80	20 80	20 150	30 60	40 50
Icu DC 500 V - 3 p in series	[kA]	25 (3)	16 36	36 85	36 50	16 70	16 70	20 65	-	-
Ics AC 50-60 Hz 380/415 V	[kA]	18	16 25	36 70	27	36 200	36 200	35 150	50 150	47 60
Category of use (IEC 60947-2)		A	A	A	A	A	B/A	B	B	B
Mechanical life	N°
N° x [103] (N° Hourly operations)		25 240	25 240	25 240	25 240	20 240	20 120	20 120	10 60	10 60
Electrical life @ 415 V	N°
N° x [103] (N° Hourly operations)		8 120	8 120	8 120	8 120	8/6 120	7/5 60	7/5/4 60	3/2 60	2.5/1.5 60
Protection releases*
TMF		X
TMD			X	X		X
TMA					X	X	X	X
TMG					X		X
ELT				X		X	X	X	X	X
Dimensions (fixed version)
Width 1 pole	[mm]	25.4
Width 3 poles	[mm]		76	90	105	105	140	210	210	406
Width 4 poles	[mm]		102	120	140	140	184	280	280	556
Depth	[mm]	70	70	70	70	103.5	103.5	103.5	154/178	242
Height	[mm]	130	130	130	150	205	205	268	268	400
Versions
Fixed		F	F	F	F	F	F	F	F	F
Plug-in				P	P	P	P
Withdrawable						W	W	W	W

(1) for In=16 A and In= 20 A Icu= 16 k A
(2) Icu @ 230 V AC
(3) Icu @ 125 V DC

*Caption:
TMF = themomagnetic fixed release
TMD = thermomagnetic with adjustable thermal release
TMA = thermomagnetic with adjustable thermal and magnetic release
TMG = release for generator protection
ELT = electronic release



Starting, switching and protection of three-phase asynchronous motors are fundamental operations for their correct use. ABB SACE proposes two different solutions for this type of application in the series of moulded-case circuit-breakers:

• a traditional system which has a circuit-breaker for protection against the short-circuit, a thermal relay for protection against overload and missing or unbalanced phase and a contactor for motor switching
• a system of integrated protection, thanks to the PR222MP release, which ensures the following protections: against short-circuit, overload, against missing or unbalanced phase, and against rotor locking.

Field of application
Available in six sizes (T2, T3, T4, T5, S6 and T7), they can be used in a vast range of start-ups, from 0.37 kW up to 250 kW with Tmax T5 and 355 kW with Isomax S6 at 400 V AC.

Conformity with Standards
As for the corresponding power distribution circuit-breakers.

		T2	T3	T4	T5	T6	T7
Iu	[A]	160	250	250 320	400 630	630 800	630 800 1000 1250
In	[A]	1÷100	10÷200	80÷250	320 400	320 630	1000
N° of poles	No.	3	3	3	3	3	3
Ue AC 50-60Hz, Ue AC 50-60Hz	[V]	690	690	690	690	690	690
Uimp	[kV]	8	8	8	8	8	8
Ui	[V]	800	800	1000	1000	1000	1000
Test voltage (50Hz, 1 min.)	[kV]	3	3	3.5	3.5	3.5	3.5
Breaking capacities
Icu AC 50-60 Hz 380/415 V	[kA]	36 85	36 50	36 200	36 200	36 100	50 150
Icu AC 50-60 Hz 690 V	[kA]	6 10	5 8	20 80	20 80	20 30	30 60
Ics AC 50-60 Hz 380/415 V	[kA]	36 70	27	36 200	36 200	36 75	50 150
Category of use (IEC 60947-2)		A	A	A	B/A	B	B
Mechanical life	N°
103 (N° Hourly operations)		25 240	25 240	20 240	20 120	20 120	10 60
Electrical life (at 415 V)	N°
103 (N° Hourly operations)		8 120	8 120	8 120	7 60	5 60	3-2 60
Protection releases (short-circuit protection)*
MF		X
MA		X	X	X
PR221 DS-I				X	X	X
PR231/P-I							X
Protection releases (integrated protection)*
PR222 MP				X	X	X
Dimensions (fixed v.)
Width	[mm]	90	105	105	140	210	210
Depth	[mm]	70	70	103.5	103.5	103.5	154/178
Height	[mm]	130	150	205	205	268/406	268
Versions
Fixed		F	F	F	F	F	F
Plug-in		P	P	P	P
Withdrawable				W	W	W	W

*Release caption:
MF = magnetic fixed
MA = magnetic adjustable
PR221DS-I = electronic
PR231 = electronic
PR222MP = electronic for motor protection


Within the panorama of the ABB moulded-case circuit-breakers there is also the range of circuit-breakers for applications in direct current and in alternating current up to 1000 V.
The typical sectors of use for these are mining, road and railway tunnel installations, electric traction and industrial applications in general.
The circuit-breakers are available in three-pole and four-pole version with TMD or TMA adjustable thermomagnetic releases for use in direct and alternating current, or in version three-pole with electronic releases (Tmax with PR221DS, PR222DS/P; Isomax with PR21x), for applications in alternating current.
The dimensions of these circuit-breakers are the same as the standard ones. They can, moreover, be combined with all the accessories available, except for the residual current, and can be converted into the removable or withdrawable version using a conversion kit and fixed parts of the standard circuit-breakers.

Distribution in AC

		T4	T5	T6
Iu	[A]	250	400 - 630	630- 1000
N° of poles	[No.]	3/4	3/4	3
Breaking capacities
Icu AC 50-60 Hz at 1000V	[kA]	20	20	20
Ics AC 50-60 Hz at 1000 V	[kA]	20	15
Short-circuit making capacity
Icm AC 50-60 Hz at 1000V	[kA]	40	40	40
Protection releases
TMD		X
TMA		X	X
ELT		X	X	X

Distribution in DC

		T4	T5	T6
Iu	[A]	250	400 - 630	630- 800
N° of poles	[No.]	4	4	4
Breaking capacities
Icu DC 1000 V 4 poles in series	[kA]	40	40	40
Protection releases
TMD		X
TMA		X	X	X

Values common to the two ranges

		T4	T5	T6
Ue	[V]	1000	1000	1000
Uimp	[kV]	8	8	8
Ui	[V]	1000	1000	1000
Isolation behaviour		X	X	X
Test voltage (50Hz, 1 min.)	[V]	3500	3500	3500
Reference Standards
IEC 60947-2		X	X	X
Dimensions (fixed v.)
Width (3 poles)	[mm]	105	140	210
Width (4 poles)	[mm]	140	184	280
Depth	[mm]	103.5	103.5	103.5
Height	[mm]	205	205	268 / 406
Versions
Fixed		F	F	F
Plug-in		P	P
Withdrawable		W	W	W

*Releases caption:
TMD = thermomagnetic with adjustable thermal
TMA = thermomagnetic with adjustable thermal and magnetic
ELT = electronic



The switch-disconnectors derive from the corresponding circuit-breakers, of which they keep the same overall dimensions, the versions, the fixing systems and the possibility of mounting the accessories. This version only differs from the circuit-breakers in the absence of the protection releases. They are characterised by a rated voltage of 690 V in alternating current and up to 750 V in direct current.

		T1 D	T3 D	T4 D	T5 D	T6 D	T7 D	S8 D
Ith	[A]	160	250	320	400 630	630 800 1000	1000 1250 1600	2000 2500 3200
Ie	[A]	125	200	320	400 630	630 800 1000	1000 1250 1600	2000 2500 3200
N° of poles	Nr.	3-4	3-4	3-4	3-4	3-4	3-4	3-4
Ue AC 50-60Hz	[V]	690	690	690	690	690	690	690
Ue DC	[V]	500	500	750	750	750	750	750
Uimp	[kV]	8	8	8	8	8	8	8
Ui	[V]	800	800	1000	1000	1000	1000	1000
Test voltage (50 Hz,1 min.)	[kV]	3	3	3.5	3.5	3.5	3	3
Icm	[kA]	2.8	5.3	5.3	11	30	52.5	85
Icw	[kA]	2	3.6	3.6	6	15	25	40
Dimensions (fixed v.)
Width (3 poles)	[mm]	76	105	105	140	210	210	406
Width (4 poles)	[mm]	102	140	140	184	280	280	556
Depth	[mm]	70	70	103.5	103.5	103.5	154/178	242
Height	[mm]	130	150	205	205	268	268	400
Versions
Fixed		F	F	F	F	F	F	F
Plug-in			P	P	P
Withdrawable				W	W	W(*)	W

(*) Up tu 800 A

In the field of molded case circuit breakers, conforming to the UL489 and CSA C22.2 Standards, SACE’s proposal presents the following ranges:

• power distribution circuit breakers (fitted with thermomagnetic or electronic trip units)
• power circuit breakers with magnetic only trip units for motor protection (Motor Control Protection - MCP)
• switch-disconnectors for use as isolators or switching devices for lines, busbars or plant parts (Molded Case Switch - MCS).

The possibilities are increasingly greater for those customers who also operate on the markets subject to the standards defined by the UL/CSA Standards since they have an entire range of molded case circuit-breakers available, with continuous current ratings which go from 100A to 2500A and interrupting rating, at 480 V AC, which can reach 100kA.
As well as extending the field of continuous current ratings downwards, introduction of the T1 size means that the applications typical of power subdistribution where a circuit-breaker characterised by limited overall dimensions, but which guarantees great versatility in mounting accessories and installation, is particularly worthwhile.
The smallest of the molded case circuit breakers, the single-pole T1, conforming to the UL, is also presented.
Finally, the S8 circuit-breaker according to UL/CSA Standards also allows completion towards the higher continuous rating currents. Isomax S8V 1600, 2000 and 2500 A lend themselves to being installed immediately to the load side of the power supply sources of the low voltage systems and are suitable for operating safely under the most severe service conditions required of modern plants. The high performances, great flexibility of accessories, ease of coordination with the devices located on the load side and the possibility of limiting the depth of the switchgear thanks to the reduced overall dimensions of the circuit breaker make Isomax S8 a particularly advantageous solution.

Distribution (MCCB)

		T1	T2	T3	T4	T5	S6	S7	S8
Frame size	[A]	100	100	225	250	400 600 (2)	800	1200	1600 2000 2500
N° of poles	No.	3 4	2 3 4	3 4	2 3 4	2 3 4	2 3	2 3	3
Interrupting ratings
480 V	[kA]	22 (1)	35 65	25 35	25 150	25 150	50 100	65	100
600 V	[kA]			105	18 85	18 85	25 42	50	85
500 V DC (3 p. in series)	[kA]			25	25 100	25 100	35 65
600 V DC (3 p. in series)	[kA]			3.6	16 65	16 65	20 50
Trip units*
TMD, TMA		X	X	X	X	X	X
ELT			X		X	X	X	X	X
Motor protection (MCP)
		T1	T2	T3	T4	T5	S6	S7	S8
Frame size	[A]		100	225	250	400	800	1200	1600 2000 2500
Rating	[A]		10 ÷ 100	100 ÷ 200	100 150 250	300 400	600 800	1000 1200	1600 2000 2500
N° of poles	No.		3	3	3	3	3	3	3
Interrupting ratings
240 V	[kA]		65 150	65	65 200	65 200	50 100	65	100
480 V	[kA]		35 65	35	25 100	25 100	50 100	65	100
600 V	[kA]				18 65	18 65
Trip units*
MA			X	X
ELT			X		X	X	X	X	X
Switch-disconnectors (MCS)
		T1	T2	T3	T4	T5	S6	S7	S8
Rating		100		150 225	250	400 600 (2)	800	1200	2500
N° of poles	No.	3-4		3-4	3-4	3-4	3	3	3
Magnetic override	[kA]	1		1.5 2.25	3	5 6	10	20	35
Rated voltage AC 50-60 Hz	[V]	480		480	600	600	600	600	600
Rated voltage DC	[V]	500		500	600	600	600	600	600

Values common to all ranges

		T1	T2	T3	T4	T5	S6	S7	S8
Rated voltage AC 50-60Hz	[V]	480	480	480	600	600	600	600	600
Rated voltage DC	[V]	500	500	500	600	600	600	-	-
Test voltage (50 Hz, 1 min.)	[kV]	3	3	3	3.5	3.5	3	3	3
Mechanical life	103 [N. op.]	25	25	25	20	20	20	10	10
Electrical life (at 415 V)	103 [N. op.]	8	8	8	8	7 / 5	7 / 5	7 / 5	2.5 / 1.5
Dimensions (fixed v.)
Width 3 poles	[mm]	76	90	105	105	140	210	210	406
Width 4 poles	[mm]	102	120	140	140	184	280	280	406
Depth	[mm]	70	70	70	103.5	103.5	103.5	138.5	242
Height	[mm]	130	130	150	205	205	268 406	406	400
Versions
Fixed		F	F	F	F	F	F	F	F
Plug-in			P	P	P	P
Withdrawable					W	W

(1) 18 kA @ 277 V AC for T1 1p
(2) ask for availability of 600 A

*Trip units caption:
TMD = thermomagnetic with adjustable thermal
TMA = thermomagnetic with adjustable thermal and magnetic
ELT = electronic