Number

of primary

turns

Primary nominal

current rms

I

Nominal*

output voltage

V

Primary resistance

R

at +25° C

Recommended

connections

1

± 25

2.5 ± 0.625

0.24

2

± 12

2.5 ± 0.600

1.08

3

± 8

2.5 ± 0.600

2.16

* Output voltage CASR 25-NP is used with internal reference.

5

Multifunctional primary circuit

The CAS and CASR construction uses three U-shaped primary terminals integrated into the housing, providing the

designer with a great flexibility to perfectly adapt the measuring range of the current transducer to his application.

Fig. 4a shows the different connection possibilities.

Fig. 4a. Different nominal current ranges possible according to the primary current circuit configuration (as example: CAS or CASR 25-NP)

When all three U-shaped terminals are connected in

parallel (variant 1 Fig. 4b) the user can measure the

maximum nominal primary current.

The variant 2 (Fig.4b) corresponds to a series connection

of the primary terminals and leads to a reduction of the

nominal measuring range by a factor of 3, but offering a

3 times higher accuracy for low currents.

Fig. 4b. The 2 extreme possibilities for connecting the primary

current circuit (as example: CAS or CASR 25-NP)

Variant 1

Variant 2

Expected for:

Expected for:

the footprint mounting and also with all the

other models that are available on the market

with the same footprint as the LTS / LTSR.

Fig. 3. CAS and CASR transducers can be mounted at the

exact place of the LTS and LTSR transducers