CKSR 6-NP LEM USA Inc, CKSR 6-NP Datasheet - Page 7

• Manufacturer Part Number: CKSR 6-NP
• Description: SENSOR CURRENT 6A 5V MOD
• Manufacturer: LEM USA Inc
• Series: CKSRr

Specifications of CKSR 6-NP

• Current - Sensing: 6A
• Accuracy: ±0.8%
• Sensitivity: 104.2mV/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: 398-1095-5

Higher insulation provided with the CKSR models thanks to their
mechanical design
The CKSR primary pin footprint is different to the CAS and
CASR models.
Thanks to this different primary footprint, higher creepage and
clearance distances are achieved.
This can be of interest when higher insulation is required for
applications under higher working voltages than normal.
Creepage and clearance distances for
8.2 mm (internal distances).
Let’s take an example to see the advance this brings.
Conditions of use:
• Creepage distance: 8.2 mm
• Clearance distance: 8.2 mm
• CTI: 600 V (group I)
• Overvoltage category: III
• Pollution Degree: 2
Basic or Single
According to EN 50178 and IEC 61010-1standards:
With clearance distance of 8.2 mm and PD2 and OV III, the rated
insulation voltage is of 1000 V
With a creepage distance of 8.2 mm and PD2 and CTI of 600 V
(group I), this leads to a possible rated insulation voltage of
1600 V
In conclusion, the possible rated insulation voltage, in these
conditions of use, is 1000 V
both results from the creepage and clearance distances).
Reinforced
Let’s look at the reinforced insulation for the same creepage and
clearance distances as previously defined:
When looking at dimensioning reinforced insulation, from the
clearance distance point of view, with OV III and according
to EN 50178 and IEC 61010-1 standards, the rated insulation
voltage is given whatever the pollution degree at 450 V
(interpolation) or 300 V
From the creepage distance point of view, when dimensioning
reinforced insulation, the creepage distance taken into account
has to be the real creepage distance divided by 2, that is to say
8.2 / 2 = 4.1 mm.
Fig. 6: Differential current measurement (I = I1 – I2), many possibilities
RMS
.
insulation:
insulation:
RMS
(without interpolation).
RMS
RMS
.
(the lowest value given by the
CKSR models
RMS
are
With that value, and PD2 and CTI of 600 V (group I), this leads to
a possible rated insulation voltage of 800 V
In conclusion, the possible reinforced rated insulation voltage, in
these conditions of use, is of 450 V
(without interpolation)(the lowest value given by the both results
from the creepage and clearance distances).
Using only the EN 50178 standard as a reference for industrial
applications, the possible reinforced rated insulation voltage in
these conditions of use is of 600 V
With
the clearance and creepage distances are each of 7.5 mm.
In the same conditions of use as for the CKSR example here
before, the result would be the following:
According to EN 50178 and IEC 61010-1 standards:
Basic or Single insulation
Reinforced insulation
(interpolation) or 300 V
With
the clearance and creepage distances are each of 7.7 mm
(distances are higher compared to the CASR models as there
are only 3 secondary pins versus 4 on the CASR models).
In the same conditions of use as for the CKSR example here
before, the result would be the following:
According to EN 50178 and IEC 61010-1 standards:
Basic or Single insulation
Reinforced insulation
(interpolation) or 300 V
(Note: all these calculations are done with creepage and
clearance distances taken on the transducer itself not mounted
on a PCB).
CASR
CAS
models, not using the special primary pins footprint,
models, not using the special primary pins footprint,
The measurement of differential currents
is also possible with special versions of
CAS, CASR and CKSR (Fig. 6). These
models are possible on request. The
current measured is the difference
of the currents I1 - I2. For insulation
reasons
distances), these models are designed
in order to have enough space between
the 2 primary conductors carrying the 2
opposite currents (due to the possible
potential difference between the two
phases).
RMS
RMS
➔ Rated insulation voltage: 404 V
➔ Rated insulation voltage: 417 V
➔ Rated insulation voltage: 600 V
➔ Rated insulation voltage: 600 V
(without interpolation).
(without interpolation).
(creepage
RMS
RMS
.
(interpolation) or 300 V
RMS
and
.
clearance
RMS
RMS
RMS
.
7
7
RMS
RMS
.