6

Thermal (T- and TA-Line)

TA45-2RU

www.schurter.com /PG17_20

Circuit Breakers

Effect of ambient temperature

The units are calibrated for an ambient temperature of +23°C. To determine the rated cur-

rent for a lower or higher ambient temperature, use a correction factor (typical value) from

the table below:

Ambient temperature [°C]

Correction factor

-10

0.89

-5

0.91

0

0.92

+23

1.00

+30

1.03

+40

1.08

+55

1.16

Example: Rated current = 5 A; Environmental temperature = 40 °C; --> Correction factor =

1.08; Resulting current = 5.5 A --> Fount to next higher rated current: 6 A

Undervoltage release

Max. operating voltage

1.1 Ue

Rated operating voltage Ue

5 V

12 V

24 V

48 V

120 V

240 V

Current consumption (± 10%)

10.5 mA

16.5 mA

17.0 mA

3.2 mA

3.7 mA

3.1 mA

2.65 mA

Highest reset level

0.85 Ue

Lowest trip level

0.20 Ue

Trip delay

20 ms - 50 ms

Impulse withstand voltage (1.2 / 50 µs)

≥4 kV

1) only for 3pole

Remote trip

Permissible impuls duration of the make contact (no)

Between terminal C and P1

unlimited

Electrical load of the make contact (no)

Current max. 12 mA / power max. 1.1 W

Time-Current-Curves

Type

TA45

Rated current

In <3 A

1 pole protected

2 pole protected

Ambient temp.

+23ºC

10'000

60

2`000

1`000

500

200

100

50

20

10

5

2

1

0,5

0,3

0,2

0,1

[ sec ]

[ min ]

10

5

1

30

20

1,05

10

8

5

4

3

2

1,32

Multiple of Rated Current In

Reference Temperature +23°

0,5

0,3

0,2

0,1

10'000

60

2`000

1`000

500

200

100

50

20

10

5

2

1

[ sec ]

[ min ]

10

5

1

30

20

1,05

10

8

5

4

3

2

1,32

Type

TA45

Rated current

3 A > In <18 A

1 pole protected

2 pole protected

Ambient temp.

+23ºC

Multiple of Rated Current In

Reference Temperature +23°