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36
Z X 1 . 5 - R
and the hand crank fitted to permit manual
completion of a switching operation.
The specific data for the relevant order are
also to be observed.
Note
When the flap (2.22) is open, the circuit breaker
is mechanically and electrically blocked in the
OFF position
•
Close the control cabinet door
Emergency manual operation of the three position
switch in a riser panel on failure of auxiliary voltage
(optional mechanical interlock) (figure 6/6a)
The flap (2.22) is released and access to the
emergency manual operation shaft provided by
pulling the interlock pin on the blocking
magnet (2.41).
6.2.3 Undervoltage release
Undervoltage releases may be fitted as an
option. In order to prevent the circuit breaker
being opened by the undervoltage release on
power failure with tee-off earthing, a tie wire is
provided.
6.3 Observation of the display and monitoring
facilities
6.3.1 Gas monitoring
(Figures 6/1, 6/7)
All high voltage compartments in the switchgear
must have a sufficient insulating gas pressure
during operation. The minimum funcional level
for insulation is listed in section 2.1. This is
monitored by sensors (1.8) and (2.3).
If the gas pressure falls below the alarm level for
insulation, a LED on the multifunction protection
and switchbay control unit signals that the gas
should be topped up. With conventional panel
control, the issue of the signal is optional and
dependent on the individual project.
Note
If a panel is isolated for a relatively long period
(several weeks), mcb (F116) for the auxiliary
voltage supply to the must remain on. Only in
this way monitoring of the insulating gas is
ensured. With conventional panel control, the
details in the order documents are to be observed.
Details on the gas system of the ZX1.5-R switchgear
can be found in instruction manual.
I N S T R U C T I O N M A N U E L
Caution: Interlocks are cancelled during
this operation. Only open or close circuits
with the circuit breaker! The three position
switch must be in a limit position!
6.3.2 Electrical/mechanical display/monitoring
During operation of the switchgear, observe all
visible operating data and condition displays in
the secondary system and watch out for
irregularities of any kind, including the external
conditions of the switchgear.
6.4 Test procedures
6.4.1 Testing for the off-circuit condition
The panels are fitted with the low impedance,
capacitive voltage indicator system for testing
of the off-circuit condition.
For details, see VDE 0682 Part 415, or IEC 61243
Part 5.
Note
Only display units which comply with the
IEC or VDE standards and the technical
design of the indicator system in the relevant
switchgear may be used!
Note
The measuring sockets must on no account
be short-circuited, except during voltage
testing of the system (e.g. with power
frequency withstand voltage or impulse
withstand voltage)!
Testing for the off-circuit condition is performed
with a plug in display unit at corresponding pairs
of measuring sockets (1.6) and optional at (4.5)
(Front side).
Use of the display unit
•
Perform a functional test on the display unit
immediately before and after use, e.g. with
interface tester. The display must be clearly
visible
•
The presence of operating voltage is indicated
by a signal
•
Observe the individual operating instructions
for the display unit for the relevant switchgear
Interface testing
•
Perform interface testing as a functional test
on all coupling components, e.g. with interface
tester
•
The interface test is a repeat test to IEC 61243
Part 5 or VDE 0682 Part 415
6.4.2 Testing for the in-line condition
Testing for the in-line condition, e.g. when there
is more than one incoming feeder, can be performed
with a suitable line comparator at measuring
sockets (1.6 and 4.5 respectively) on the capacitive
voltage indication system.
Test procedure:
•
Only use line comparators which comply with
the IEC or VDE specifications and the technical
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