CKSR 25-NP LEM USA Inc, CKSR 25-NP Datasheet - Page 5

• Manufacturer Part Number: CKSR 25-NP
• Description: SENSOR CURRENT 25A 5V MOD
• Manufacturer: LEM USA Inc
• Series: CKSRr

Specifications of CKSR 25-NP

• Current - Sensing: 25A
• Accuracy: ±0.8%
• Sensitivity: 25mV/A
• Current - Supply: -
• Sensor Type: Flux Gate
• Voltage - Supply: 4.75 V ~ 5.25 V
• Output: 0 ~ 5 VDC
• Frequency: 300kHz
• Response Time: 300ns
• Polarization: Bidirectional
• Operating Temperature: -40°C ~ 105°C
• Package / Case: Module
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 398-1097-5

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.
* Output voltage CASR 25-NP is used with internal reference.
Fig. 4a. Different nominal current ranges possible according to the primary current circuit configuration (as example: CAS or CASR 25-NP)
Variant 1
Fig. 4b. The 2 extreme possibilities for connecting the primary
Fig. 3. CAS and CASR transducers can be mounted at the
Expected for:
I
PN
(I
PMAX
exact place of the LTS and LTSR transducers
of primary
current circuit (as example: CAS or CASR 25-NP)
) = 25 A (85 A max)
Number
turns
1
2
3
Expected for:
I
PN
Primary nominal
Variant 2
/ 3 (I
current rms
I
± 25
PN
± 12
PMAX
± 8
[ A ]
/ 3) = 8.33 A (28.33 A max)
output voltage
2.5 ± 0.625
2.5 ± 0.600
2.5 ± 0.600
Nominal*
V
OUT
[ V ]
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.
The
with the LTS and LTSR models
the footprint mounting and also with all the
other models that are available on the market
with the same footprint as the LTS / LTSR.
Primary resistance
CAS / CASR models are 100% compatible
R
P
at +25° C
[ mΩ ] ( typ. )
0.24
1.08
2.16
Recommended
connections
in regards to
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