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P rimeGe ar Z X0 P R O D U C T M A N U A L
62
• Establish the test circuit in accordance with the
protection tester manufacturer's directions and
perform the test.
Panels with current transformers
• Establish the test circuit in accordance with the
protection tester manufacturer's directions and
perform the test.
Panels with sensors
Current and voltage sensors are generally
connected to the protection device via a sensor
test adapter which is installed in the low voltage
compartment. The sensor test adapter (Fig.5.4.1)
provides one socket for each phase for
connection of a protection tester or protection
testing apparatus by network cables (RJ45
interface) (see single line diagram in Fig.5.4.2).
Changing of the existing wiring is not necessary.
• Connect the test apparatus in accordance with
the manufacturer's instructions for the
protection tester, and perform the test.
—
Fig. 5.4.2 Connection
of the protection
tester to the sensor
test adapter (example
of one current sensor
per phase and voltage
sensors)
—
Fig. 5.4.3 Test circuit
—
Fig. 5.4.2
Note that when the voltage signals from
the voltage transformers or voltage
sensors in the panel to be tested are
used by other panels, the signals are not
available during the work. This can lead
to impairments of function in the other
panels.
Protection and
Sensor test
adapter
Protection
tester
5.5 Protection testing by primary current
injection
Direct access to the conductors for performance
of protection tests by primary current injection is
possible via the fitted cable connectors. The test
current is applied via suitable testing sets for the
cable connector system used.
• Isolate the relevant switchgear section in
accordance with section 4.
• Test the switchgear section for the off-circuit
condition as described in section 5.1.
• Earth the switchgear section and secure the
working area in accordance with section 4 and
EN 50110 standard.
• Switch the mcbs
mechanisms off in order to prevent the
switchgear section being energized by remote
control.
• Observe the example of primary side test
circuits in Fig.5.5.1.
control device
Test transformer
—
Fig. 5.4.3
Comply with the safety regulations to EN
50110.
of the relevant operating
1)
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