TAVRIDA ELECTRIC VCB Series, User Manual, Page: 89 / 142

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The list of commissioning operations and checks is shown in Table 17 below. Initial state of VCB components
before checks: ISM - open, CM - deenergized. Main circuits of ISM shall be disconnected/isolated from the
main circuits of substation to avoid high voltage being applied to the ISM before the commissioning procedure
completion. Commissioning and maintenance is only permitted for qualified and trained personnel.
Table 17 - List of commissioning operations and check-ups
Operation description Required tool Approximate timing
Tests at the end of installation
Check for damage, remove any dirt,
contamination or moisture
Visual check, no tool is required 2 minutes
Unsupported busbar length shall be according to
Table 2 for LD ISM and Table 5 for HD ISM
Ruler, tape measure or calliper - depends on
distance value and place of measurement
execution
2 minutes
Fixing points shall be according to Figure 61-
Figure 67
Visual check, no tool is required 1 minute
Bolts and torques shall be according to Figure
61 - Figure 67
Torque wrench according to torque value 2 minutes
Clearances shall be according to subchapters
4.1.3 and 4.1.4
Ruler, tape measure or calliper - depends on
distance value and place of measurement
execution
2 minutes
Protective earthing shall be according to
subchapter 4.1.8
Visual check, no tool is required 1 minute
Check that free air circulation at ISM is possible Visual check, no tool is required 1 minute
Installation of CM shall be according to
subchapter 4.2.4
Visual check, no tool is required 1 minute
Availability of the CM auxiliary power supply. It is
recommended to use the same auxiliary power
supply as for protection and control devices.
Type of voltage and voltage level according to
selected CM type
Voltmeter with measurement range according to
expected power supply voltage value
2 minutes
Polarity of auxiliary power supply and selection
of MCB shall be according to subchapter 4.2.6.
Check of compliance between ISM type on
ISM serial number plate and on CM
designation label
DC voltmeter with measurement range
according to expected power supply voltage
value - for voltage polarity check. Visual check,
no tool is required
– for MCB check
2 minutes
Connection between CM and ISM shall be
according to subchapter 4.2.5
Multimeter - for validation of correct wiring
connections (utilizing the continuity function of
the meter)
5 minutes
Checking that all secondary connections have
been secured adequately
Visual and mechanical check of connections, no
tool is required
2 minutes
Checking whether the CM, ISM are connected
according to project/ product documentation and
according
to circuit diagrams in „Appendix 3.
Secondary schemes“.
Multimeter - for validation of correct wiring
connections (utilizing the continuity function of
the meter)
5 minutes