Appendix F
Current Sensor Installation
Copyright © 2008-2009 Eaton Corporation. All Rights Reserved.
IPN 997-00012-71B July 2009
87
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Current Sensor Installation
CS04-A11 current sensor
Current rating:
> 500A
Mounting:
Screws (supplied) in the LIVE bus
Current sense signal:
60mV at maximum rated current
Communication cable:
8m (26’) RJ45 (supplied)
Extension PCB:
For measurement on very large busbars
Busbar material:
Copper or Aluminum
"
CS04 Current Sensor Extension PCB
(optional)
#
Current Sensor Pickup Contacts
$
Input inductor
%
Potentiometer for fine-tuning the Current
Sensor Gain
!
RJ45 Current Sense Signal Output (XU1)
– to supervisory module (via intermediate
current sensor, if fitted)
&
RJ45 Current Sense Signal Input (XU2)
– from other current sensor (if fitted)
3
Using the CS04 Current Sensor Extension PCB
The CS04 current sensor extension PCB increases the distance between the two pickup points
of the CS04-A11 current sensor. Use the CS04 current sensor extension PCB if:
•
measuring current flow in very large bus bars, or
•
the required gain of the current sensor is greater than 40.
Current Sensor Preparation
Step 1 – Calculate the required gain of the CS04 current sensor
Gain = - Constant x (CSA / I
MAX
)
Where: CSA
= Cross sectional area of the bus bar (mm²)
I
MAX
= Maximum expected current through the bus bar (A)
Constant
=
68.24V.W
-1
.mm-
2
(for copper bus bars)
=
43.57V.W
-1.
mm-
2
(for aluminum bus bars)
