Omicron CPC 100 User Manual

CP CU1 - 4
CP CU1
Start with the 100 A
current range.
Is the line longer than
2km/1.5mi?
Is the line longer than
10 km/6 mi?
Is the line longer than
50 km/30 mi?
Use the 10 A
current range.
Connect a grounding set in parallel to the closed
grounding disconnector to each phase. Connect it first to
the ground and then to the line. Open the grounding
disconnector and measure the currents in all three
grounding sets. Use the highest measured value of I
GS
in
the following formula. Close the grounding disconnector
after the measurement is done.
Yes Set 50 A
Yes Set 20 A
Yes Set 10 A
No
No
No
Is
Line Length × 2 × 0.4/km (0.64/mi) × I
GS
greater than 50 V?
Is
Line Length × 2 × 0.4/km (0.64/mi) × I
GS
greater than 100 V?
Is
Line Length × 2 × 0.4/km (0.64/mi) × I
GS
greater than 250 V?
Is
Line Length × 2 × 0.4/km (0.64/mi) × I
GS
greater than 500 V?
No
No
No
No
Yes S et 50 A
Yes S et 20 A
Yes
Yes
Close the grounding disconnector, disconnect the
grounding sets first from the line and then from the
ground. Connect the grounding sets to the CP GB1 and
then to the line. Make the connections to the CP CU1 and
CPC 100 according to the figures on the following pages.
Open the grounding disconnector and read the display
value of the CP CU1. Close the grounding disconnector
afterwards.
Is the value greater than
50 V?
Is the value greater than
100 V?
Is the value greater than
250 V?
Is the value greater than
500 V?
Yes S et 5 0 A
Yes S et 20 A
Yes
Yes
Set 10 A
Start the measurement according to the application
description in one of the following chapters. Try to find out
the maximum possible current at 20 Hz above and below
the mains frequency to avoid overload display.
No
No
No
No
Are 60 A possible?
Are 30 A possible?
Are 12 A possible?
Is 1 A possible?
No Set 50 A
No Set 20 A
No
No
Set 10 A
Reduce the current for the higher frequencies as needed
to avoid overloads. Try to keep identical settings for all
test cards in one procedure.
Yes
Yes
Yes
Yes
Stop! The measurement cannot be performed on this line.
Try to take parallel lines out of service or to reduce the current flow on the parallel systems.
Set 10 A
Connecting the CPC 100 and CP CU1 to Power Lines

Omicron CPC 100 Specifications

General

Brand	Omicron
Model	CPC 100
Category	Test Equipment
Language	English