Omicron CPC 100 - Functional Elements; CP GB1 Grounding Box

CP CU1
CP CU1 - 2
CP CU1
The CP GB1 grounding box is a surge arrestor unit for connecting the CP CU1 to the test object.
If high voltage appears for a short time on the test object’s terminals, an arc discharges the
voltage and extinguishes without destroying the grounding box. If the arc persists for a longer
time period, the surge arrestor insulator melts and the terminals are short-circuited to ground,
thereby protecting the operating staff, CP CU1 and CPC 100.
To short the phases, connect the line studs of the CP GB1 as shown below.
DANGER
Death or severe injury caused by high voltage or current
► Use the short-circuit bar to short-circuit the secondary side of the internal CT.
Equipotential ground
terminal
I AC output
Location to store the
short-circuit bar
V1 AC output
VT 600 V : 30 V
V SENSE input
Fuse 30 A
BOOSTER input
Voltmeter
Current range switch
CT 100 A : 2.5 A
I OUT output
To test object
To CP CU1
Surge arrestor
Ground connection
DANGER
Death or severe injury caused by high voltage or current
► The CP GB1 grounding box must be used for measurements on overhead lines or
power cables.
► Check the surge arrestors before using the CP GB1. Refer to the CP CU1
Reference Manual for more Information.
Functional Elements CP GB1 Grounding Box