ABB ConVac, Installation And Operation Instruction Manual

I N S T A L L A T I O N

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Fig 5e

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Fig

5f

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.