Omicron CPC 100 Reference Manual

Current Transformer
4 - 45
Measurements
Selecting the check box "Manual input" lets you enter the value for Vsec
manually, for example, when Vsec was measured with an external volt meter
rather than at input V2AC.
Iprim: actual output current at the output that is injected into the low
power current transformer’s primary side
Vsec: secondary voltage measured at V2AC, and its phase angle
relative to Iprim
Ratio:
ratio Iprim/Vsec., here 200.0:22.53 A/mV
1
1. The value 22.53mV is calculated as follows:
Vsec act x (Iprim nom / Iprim act); here: 22.53mV x (199.99A / 200A) = 22.53 mV (rounded)
and deviation of current ratio in %. Formula:
((Kn x Vsec - Iprim) / Iprim) x 100%
2
((200A / 22.5mV * 22.53mV - 199.99A) / 199.99A) x 100% =
+0.138%
2. Kn = rated transformation value, here: 200A / 22.5mV
Polarity: displays the status of the polarity
OK = phaseVsec - phaseIprim = -45° < 0° < 45°
NOT OK = all other cases

Omicron CPC 100 Specifications

General

Brand	Omicron
Model	CPC 100
Category	Test Equipment
Language	English