22
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
—
Fig 5d
5.8.2 Racking in and out operation
(
for
withdrawable version
)
While carrying out the racking-in/out operation of
a manual truck, first insert the manual racking-in
handle to the right position
(
Fig 5d
)，
clockwise
rotation of the handle will rack-in the contactor to
the working position, anti-clockwise rotation of the
handle will rack-out the contactor to the testing
position.
Operate slowly while racking-in/out the contactor
in order to avoid any deformation of the mechanical
interlocks. The torque needed to carry out truck
handling is < 25 Nm, do not exceed this limit while
operating. If there’s any difficult during the
operation, don’t apply hard push, please check if
the operation sequence is correct.
The earthing devices installed on both sides of the
truck cooperates with the guide rail on the
switchgear, guarantees the reliable earthing
between the ConVac frame and the main earthing
system.
Attention
！
The contactor must only be racked into the
unit in open position.
While racking-in/out manually, the handle
need to turn approximately 20 rounds .
Truck can only be removed
from the switchgear when it
is in test position and the
spindle angle is as this
picture
5.8.3 Withdrawable ConVac with motorized truck
Carry out the racking-in/out test of the motorized
truck in the same way as for a manual truck,
following the instructions below:
•
De-energize the motor power supply circuit, check
whether the contactor is in working or testing
position, whether the positioning interlock on
the truck beam is stuck into the corresponding
slot on both sides of the switchgear, if the 2
handles could pull left and right flexibly
•
First operate several manual racing-in/out
operations with the handle, check if there’s any
jamming during the operation, if the interlock is
in right position
•
Check whether the positive and negative polarity
of motor power is correct
a) Rack the contactor to the middle position
with the handle
b) Take out the handle
c) Supply the truck motor circuit with power
d) Activate the command for the electrical
racking-in/out to check if the moving direction
is correct.
Motorized operation
•
Supply the motor control system (pay attention
to the +/- polarity)
•
Check the contactor position sign
•
While pulling the contactor out of the
switchgear from testing position, make sure
that the spindle angle is as the picture below,
and check the two handles on the truck could be
moved left and right flexibly(if the spindle is not
in place, please adjust it manually)
Please use the MDC2 or MDC4 provided by
ABB as a motor control unit, otherwise the
motor might be damaged.
5.8.4 Emergency opening (Only for mechanical
latching)
Emergency opening is only allowed by
specially trained personnel with detailed
knowledge of the equipment.
For fixed and withdrawable version of mechanical
latching ConVac contactor, emergency opening
could be realized in manual mode.
For fixed contactor, please apply < 80 N force and
<20 mm stroke to pull the mechanical release
lever (Fig. 5e) to open the contactor under
emergency situations.
For withdrawable version, please use a special
tool to apply <100 N force and <35 mm stroke to
trigger the emergency opening button on the
front cover (Fig 5f), then open the contactor.
To perform the operation above, please reserve
operating hole on the switchgear door.
Содержание ConVac
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