ABB PrimeGear ZX0 Product Manual page 61

T E S T P R O C E D U R E S
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• Remove any surge arresters fitted in the section
of the system to be tested in accordance with
the manufacturer's instructions.
• Short-circuit the sockets for the capacitive
indicator system in the relevant switchgear
section using the short-circuiting plug.
• Connect the test transformer to the test plug or
test cable and earth the other two phases of
the test system.
• Connect the second terminal of the test
transformer to system earth.
• Close the switch-disconnector and the circuit
breaker in the panel through which the test
voltage is to be applied. Open the
switch-disconnectors and circuit breakers in all
the other panels. If the test voltage is applied
via the busbar, open all circuit breakers and
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Fig. 5.4.1 Sensor test
switch-disconnectors.
adapter (example for
• Perform the high-voltage test.
connection of one
current sensor per
• Earth the system section on completion of
phase)
individual tests and on conclusion of testing.
• Remove the high-voltage testing sets.
• Fit any surge arresters and voltage transformers
required.
• Close off free outer cones with insulating
blanking plugs in accordance with the
manufacturer's instructions.
• Cancel any isolation of voltage transformers.
• Remove the short-circuiting plugs from the
capacitive indicator.
• Eintended use at regular intervals.
If there are isolatable voltage transformers
or sockets for these within the section of
the system to be tested, use the isolating
device to isolate them (see section 4.4)
(Isolating of voltage sensors is not
necessary).
Remove the busbar voltage transformers
within the section of the system to be
tested, and close off all cross and end
adapters with the insulating plugs
provided (see section 2.2.3) (Isolating of
voltage sensors is not necessary).
5.4 Secondary protection testing
Comply with the safety regulations to EN
50110.
• Isolate the feeder panel to be tested in
accordance with section 4.
• Test the switchgear section for the off-circuit
condition as described in section 5.1.
• Earth the outgoing feeder and secure the
working area in accordance with section 4 and
EN 50110 standard.
of the relevant operating
• Switch the mcbs 1)
mechanisms off in order to prevent the outgoing
feeder being energized by remote control.
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Voltage may only be applied to the OFF
release coil of the circuit breaker (shunt
release OFF) for a period of 1000 ms. If
this time is exceeded the coil will burn out.
For this reason, the protection testing
system must be shut down by the OFF
command, or the shunt release OFF must
be disconnected.
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If the circuit breaker is also to be tested,
please note that earthing via the circuit-
breaker is cancelled when the breaker is
opened. Otherwise, disconnect the release
coil before testing.
1) mcb: miniature circuit breaker.
Connections for the protection tester
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Fig. 5.4.1
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