CIRCUIT BREAKERS
Specifications
Molded Case Circuit Breakers
TD/TS series circuit breakers have built in thermal-magnetic trip units.
Some models of the TD/TS series circuit breakers are UL Listed to be applied at up to 100%
of their current rating. Because of the additional heat generated, the use of specificallydesigned enclosures and 90°C rated wire are required when using circuit breakers at 100%
of their current rating.
Markings on the circuit breaker indicate the minimum enclosure size and ventilation
requirements. The 90°C wire size shall be based on UL 489. Circuit breakers with 100%
rating can also be used in applications requiring only 80% continuous loading.
Molded Case
Circuit Breakers
TD/TS Series
TD125
Frame size
125AF
Rated current ln
A
15, 20, 30, 40, 50, 60, 80, 100, 125
V
600
3
Number of poles
Rated operational voltage, Ue AC
UL interupting rating
AC 50/60Hz
kA
NU
HU
120V
50
100
240V
50
100
480V
35
65
600V
10
14
UL 489
Reference standard
Fixed thermal, fixed magnetic
FTU
Adjustable-thermal, fixed-magnetic
Available breaker types
FMU
-
AX - Auxiliary switch
AL - Alarm switch
SHT - Shunt trip
UVT - Undervoltage trip
Accessories
EHU - Extended rotary handle
FH - Flange handle
PL, PHL - Locking devices (Removable, fixed)
MIT - Mechanical interlock device
Mechanical life
Operations
4,000
Electrical life @600V AC
Operations
4,000
Weight 3-pole lbs (kg)
Basic dimension, Wx Hx D 3-Pole in (mm)
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2.65lbs (1.2kg)
3.54 x 6.46 x 3.39in (90 x 164 x 86mm)
CIRCUIT BREAKERS
Specifications
TS250
TS400
250AF
400AF
TS800
800AF
150, 175, 200, 250
300, 400
500, 600, 800
3
3
3
600
600
600
NU
HU
NU
HU
NU
HU
-
-
-
-
-
-
50
100
50
100
50
100
35
65
35
65
35
65
10
18
14
20
18
25
UL489
Fixed thermal, fixed magnetic, FTU
Fixed thermal, fixed magnetic, FTU
Fixed thermal, fixed magnetic, FTU
Adjustable-thermal, fixed-magnetic, FMU
Adjustable-thermal, fixed-magnetic, FMU
Adjustable-thermal, fixed-magnetic, FMU
Adjustable-thermal, Adjustable-magnetic (3 pole), ATU
Adjustable-thermal, Adjustable-magnetic (3 pole), ATU
Adjustable-thermal, Adjustable-magnetic (3 pole), ATU
AX - Auxiliary switch
AX - Auxiliary switch
AX - Auxiliary switch
AL - Alarm switch
AL - Alarm switch
AL - Alarm switch
SHT - Shunt trip
SHT - Shunt trip
SHT - Shunt trip
UVT - Undervoltage trip
UVT - Undervoltage trip
UVT - Undervoltage trip
EHU - Extended rotary handle
EHU - Extended rotary handle
EHU - Extended rotary handle
FH - Flange handle
FH - Flange handle
FH - Flange handle
PL, PHL - Locking devices (removable, fixed)
PL, PHL - Locking devices (removable, fixed)
PL, PHL - Locking devices (removable, fixed)
MIT - Mechanical interlock device
MIT - Mechanical interlock device
MIT - Mechanical interlock device
5,000
5,000
1,000
1,000
3,000
500
4.19lbs (1.9kg)
12.57lbs (5.7kg)
29.98lbs (13.6kg)
4.13 x 7.01 x 3.39in (105 x 178 x 86mm)
5.51 x 11.50 x 4.33in (140 x 292 x 110mm)
8.27 x 16.85 x 5.31in (210 x 428 x 135mm)
CIRCUIT BREAKERS
Ordering Information
TD/TS Series Circuit Breakers (FTU)
Frame
Size
125AF
250AF
400AF
Amp
Rating
UL Interrupting Rating (kA)
240V
NU
HU
480V
NU HU
600V
NU HU
Magnetic
Trip Setting
NU Series
(Normal Interrupting)
15A
TD125HU FTU 125 15A
TD125NU FTU 125 15A
20A
TD125HU FTU 125 20A
TD125NU FTU 125 20A
30A
TD125HU FTU 125 30A
TD125NU FTU 125 30A
40A
TD125HU FTU 125 40A
TD125NU FTU 125 40A
TD125HU FTU 125 50A
TD125NU FTU 125 50A
60A
TD125HU FTU 125 60A
TD125NU FTU 125 60A
80A
TD125HU FTU 125 80A
TD125NU FTU 125 80A
100A
TD125HU FTU 125 100A
TD125NU FTU 125 100A
125A
TD125HU FTU 125 125A
TD125NU FTU 125 125A
150A
TS250HU FTU 250 150A
TS250NU FTU 250 150A
TS250HU FTU 250 200A
TS250NU FTU 250 200A
250A
TS250HU FTU 250 250A
TS250NU FTU 250 250A
300A
TS400HU FTU 400 300A
TS400NU FTU 400 300A
TS400HU FTU 400 400A
TS400NU FTU 400 400A
TS800HU FTU 800 500A
TS800NU FTU 800 500A
TS800HU FTU 800 600A
TS800NU FTU 800 600A
TS800HU FTU 800 800A
TS800NU FTU 800 800A
50A
200A
400A
50
50
50
100
100
100
35
35
35
65
65
65
10
10
14
14
18
20
10X
5-10X
5-10X
500A
800AF
HU Series
(High Interrupting)
600A
50
100
35
65
18
25
5-10X
800A
TD/TS Series Circuit Breakers (FMU)
Frame
Size
125AF
Amp
Rating
400AF
480V
NU HU
600V
NU HU
Magnetic
Trip Setting
NU Series
(Normal Interrupting)
TD125HU FMU 125 40A
TD125NU FMU 125 40A
50A
TD125HU FMU 125 50A
TD125NU FMU 125 50A
60A
TD125HU FMU 125 60A
TD125NU FMU 125 60A
TD125HU FMU 125 80A
TD125NU FMU 125 80A
100A
TD125HU FMU 125 100A
TD125NU FMU 125 100A
125A
TD125HU FMU 125 125A
TD125NU FMU 125 125A
150A
TS250HU FMU 250 160A
TS250NU FMU 250 160A
TS250HU FMU 250 200A
TS250NU FMU 250 200A
250A
TS250HU FMU 250 250A
TS250NU FMU 250 250A
300A
TS400HU FMU 400 300A
TS400NU FMU 400 300A
TS400HU FMU 400 400A
TS400NU FMU 400 400A
TS800HU FMU 800 500A
TS800NU FMU 800 500A
TS800HU FMU 800 600A
TS800NU FMU 800 600A
TS800HU FMU 800 800A
TS800NU FMU 800 800A
200A
400A
50
50
50
100
100
100
35
35
35
65
65
65
10
10
14
14
18
20
10X
5-10X
5-10X
500A
800AF
HU Series
(High Interrupting)
40A
80A
250AF
UL Interrupting Rating (kA)
240V
NU
HU
600A
50
100
35
65
18
25
5-10X
800A
TD/TS Series Circuit Breakers (ATU)
Frame
Size
Amp
Rating
UL Interrupting Rating (kA)
240V
NU
HU
480V
NU HU
600V
NU HU
50
35
10
Magnetic
Trip Setting
400AF
TS250NU ATU 250 160A
TS250HU ATU 250 200A
TS250NU ATU 250 200A
250A
TS250HU ATU 250 250A
TS250NU ATU 250 250A
300A
TS400HU ATU 400 300A
TS400NU ATU 400 300A
TS400HU ATU 400 400A
TS400NU ATU 400 400A
TS800HU ATU 800 500A
TS800NU ATU 800 500A
TS800HU ATU 800 600A
TS800NU ATU 800 600A
TS800HU ATU 800 800A
TS800NU ATU 800 800A
200A
400A
50
100
100
35
65
65
14
18
20
5-10X
5-10X
500A
800AF
NU Series
(Normal Interrupting)
TS250HU ATU 250 160A
150A
250AF
HU Series
(High Interrupting)
600A
50
100
35
65
800A
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18
25
5-10X
CIRCUIT BREAKERS
Technical Information
Application
Circuit Breakers for 400Hz Networks
When circuit breakers are used at high frequencies, the breakers are required to be derated due
to increased resistance of the copper sections resulting from the skin effect produced by eddy
currents at 400Hz.
• Standard production breakers can be used with alternating currents with frequencies other than
50/60Hz when appropriate derating coefficients should be applied.
Thermal Magnetic Trip
Thermal trip: From the data shown below, the tripping threshold of the thermal element (ln)
decreases as the frequency increases because of the reduced conductivity of the materials and the
increase of the associated thermal phenomena. Rated current (A) at 400Hz= K1x rated current (A)
at 50/60Hz.
Instantaneous trip: The magnetic threshold increases with the increase in frequency.
Instantaneous current (A) AT 400Hz= 2x Instantaneous current (A) at 50/60Hz
Thermal Magnetic Trip Units
TD and TS Series Performance Table at 400Hz
Rated current
(A)
In at 400Hz
Multiplier factors (K1, K2)
MCCB
MCCB Style
K1
(Thermal trip units)
K2
(Magnetic trip units)
15
0.8
2
20
0.8
2
30
0.8
2
40
0.8
2
0.8
2
0.8
2
50
TD125NU, TD125HU
60
FTU
FMU
80
0.8
2
100
0.8
2
125
0.8
2
150
0.8
2
160
0.8
2
175
0.8
2
200
TS250NU, TS250HU
225
250
300
350
TS400NU,TS400HU
FTU
FMU
ATU
0.8
2
0.8
2
0.8
2
0.8
2
0.8
2
2
400
0.8
500
0.8
2
600
0.8
2
0.8
2
0.8
2
700
TS800NU, TS800HU
800
*K1x multiplier factor of rated current (ln)
K2-multiplier factor of instantaneous current due to the induced magnetic fields
FTU-Fixed Thermal and magnetic trip unit
FMUx-Adjustable thermal and fixed magnetic trip unit
ATUx-Adjustable thermal and magnetic trip unit
CIRCUIT BREAKERS
BREAKER BO
NEMA 3R Enclosed Circuit Breaker
125-800AF
NEMA Rated
Enclosed Breaker for Harsh Environments
Simplified product range
ƒƒ AF: 125, 250, 400, 800
ƒƒ Ampere range: 15A ~ 800A
Superior technology results in high performance
ƒƒ
ƒƒ
ƒƒ
ƒƒ
ƒƒ
Cerus TD and TS circuit breakers provide superior performance in a compact package,
with adjustable thermal trip settings and magnetic trip settings for ultimate flexibility
Advanced arc quenching technology ensures excellent trip performance and long life
Standardized internal accessories are interchangeable on all models and are field or factory installed
Accessories mount on right or left side to simplify panel wiring
Perfect for main disconnect applications
Variable accessories
Common use of electrical auxiliaries
Motor operator
Plug-in kit
Terminals
Communication module
Cerus support & service
ƒƒ
ƒƒ
ƒƒ
ƒƒ
ƒƒ
Live tech support
Made in USA
Same day shipping
5 year warranty
World class customer service
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High Interrupting Capacity
TS800HU
TS400HU
TS250HU
TD125HU
TS800NU
TS400NU
TS250NU
TD125NU
Rated current (A)
ƒƒ
ƒƒ
ƒƒ
ƒƒ
ƒƒ
800A
400A
250A
125A
CIRCUIT BREAKERS
Ordering Information
*Please refer to page 92 for Molded Case Circuit Breaker part numbers
TD/TS Series Accessories
Alarm & Auxiliary Switches
Description
Part Number
Alarm Switch for TD/TS Series MCCB
AL-TD/TS
Auxiliary Switch for TD/TS Series MCCB
AX-TD/TS
Under Voltage Trip, UVT
Control Voltage
Part Number
AC/DC 24V
UVT-24V
AC/DC 48V
UVT-48V
AC/DC 110~130V
UVT-120V
AC/DC 200~240V/DC 250V
UVT-230V
AC/DC 380~440v
UVT-400V
AC/DC 440~480v
UVT-480V
Shunt Trip, SHT
Control Voltage
DC 12V
SHT-12VDC
AC/DC 24V
SHT-120V
AC/DC 48V
SHT-230V
AC/DC 110~130V
SHT-24V
AC/DC 220~240V/DC250V
SHT-48V
AC/DC 380~500V
SHT-480V
Enclosures
AF
Part Number
Part Number
125AF
CER1-TD125CB-ENCL
250AF
CER1-TS250CB-ENCL
400AF
CER1-TS400CB-ENCL
800AF
CER1-TS800CB-ENCL
CIRCUIT BREAKERS
Breaker Box Dimensions
CER1-TD125CB-ENCL
7.283
5.300
4.143 MTG
9.623 MTG
12.923
FRONT VIEW
SCALE 1/3
RIGHT VIEW
SCALE 1/3
BACK VIEW
SCALE 1/3
Ø1.750 KNOCKOUT (x2)
Ø 1.125 KNOCKOUT (x2)
BOTTOM VIEW
SCALE 1/3
CER1-TS250CB-ENCL
5.300
12.240
8.000 MTG
23.850
16.000 MTG
Ø .250
LOCKOUT
FRONT VIEW
SCALE 1/5
Ø 2.500 KNOCKOUT (x2)
Ø1.500 KNOCKOUT (x2)
BOTTOM VIEW
SCALE 1/5
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RIGHT VIEW
SCALE 1/5
BACK VIEW
SCALE 1/5
CIRCUIT BREAKERS
Breaker Box Dimensions
CER1-TS400CB-ENCL
6 1/2 MTG.
8 3/4
3/8 THRU
25 MTG.
37 1/16
OD
FRONT VIEW
SCALE 1/3
RIGHT VIEW
SCALE 1/3
BACK VIEW
SCALE 1/3
11 11/16
OD
BOTTOM VIEW
SCALE 1/3
CER1-TS800CB-ENCL
16
109 16
10
MTG.
421 16
30
MTG.
FRONT VIEW
BOTTOM VIEW
RIGHT VIEW
BACK VIEW