ABB ConVac Installation And Operation Instruction Manual page 20

20 C O N V A C V A C U U M C O N T A C T O R I N S T A L L A T I O N A N D O P E R A T I O N I N S T R U C T I O N
5.7 Assembly and connections
5.7.1 Fixed version
Before carrying out any installation operations：
• Test all the power terminals to check that they
are not supplied with voltage. Only use high
voltage testing equipment approved for checking
the voltage on the power terminals. Do not
attempt to measure the high voltage (above
600 V) with a volt-ohm/meter
• Check all the control and secondary circuit
terminals with a voltmeter to ensure that all the
control and secondary input voltage sources have
been turned off
• After de-energizing but before proceeding with
any work on the apparatus, confirm that power
terminals have been grounded and are in safe
conditions
• Carry out all the operations for turning off the
voltage and grounding according to the
established safety procedures
General inspections
• Clean the insulation surface with a rough dry cloth
• Check that the contact surfaces of the connections
are flat, and are free of any burrs, traces of
oxidation or deformation caused by drilling or
impacts received
• Select the cross-section of the conductors
according to the service current and the short-
circuit current of the installation
• Prepare special support insulators near the
terminals of the contactor, sized according to
the electrodynamic forces caused by the short-
circuit current of the installation and avoid
stressing the connections laterally
ConVac installation and connection of the
primary circuit
• Fixed conductors could be installed directly on
the support frame, according to the overall
dimensions in 5.5.1
• put the connections in contact with the contactor
terminals, taking care to avoid mechanical stresses
produced, for example, by the conductor busbars
on the terminals themselves
• Interpose a spring and a flat washer between the
head of the bolt and the connection. The use of
bolts according to DIN class 8.8 Standards is
recommended, also referring to what is indicated
in the table
Bolt
M6
M8
Warning
M10
Dangerous voltages. Risk
M12
of death, serious injury to
people, damage to the
apparatus or other
• In the case of cable connections, strictly follow
objects.
• Grounding of fixed ConVac is realized by
—
Fig 5a
Connection of the auxiliary circuits
• The cables to be used for connection of the
• Please refer to 5.6.1 for the wiring of auxiliary
• Outside, the wires must run through metallic
5.7.2 Withdrawable version
• The withdrawable contactors are used in the
• Confirm that the contact fingers are clean, and
• The auxiliary circuit connections of withdrawable
• The cables to be used for connection of the
• three current-limiting fuses (prepared by
Recommended tightening torque
without lubricant
10 Nm
25 Nm
50 Nm
86 Nm
the manufacturer's instructions for making the
terminals
grounding bolt, accompanied by a grounding
sign as Fig 5a shows. An area of about 30 mm
around the grounding bolt should be kept clean,
reapply Vaseline lubricant to cover the joint after
installation. Use cables with a suitable cross-
section according to related standards
auxiliary circuits must no less than the cable
used inside the contactor, and be insulated for
2 kV/1 min test
circuit, make sure the cables are reliably
connected to the contactor
pipes or ducts suitably grounded
UniGear ZS1 or other switchgear with the same
dimension
no deformation due to shipping or crash
contactor are derived via the plug. The wiring
diagram could refer to chapter 5.6.2
auxiliary circuits must no less than the cable used
inside the contactor, and be tested for 2 kV/ 1 min
customers) with high breaking capacity connected
in series with the contactor, with dimensions
according to
- DIN 43625 Standard with maximum length e
=442 mm