Siemens 8DA Installation Instructions Manual page 28

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Correcting contact overlap-
ping of disconnector con-
tacts
Mounting busbar housing
covers without desiccant
bag holders
Bolting supporting frames
together
28
Fig. 19: Disconnector coupling rod
!
s
Undo the lock nuts
!
Modify the length of the disconnector coupling rod
sleeve until the contact blades hold the fixed contacts centrally in the CLOSED
position.
!
Tighten the lock nuts
ATTENTION!
In the ambient air, the desiccant bags lose their effectiveness rapidly and cannot be
used anymore.
!
Use only desiccant bags whose packing is not damaged and whose humidity
indicators in the packing are blue.
!
Do not use desiccant bags if the humidity indicators are pink.
!
After opening the packings, mount the desiccant bags in the gas compartment
within 30 minutes and close the gas compartment hermetically.
For this reason, the busbar housing covers without a holder for desiccant bags are
mounted first (cover without "Filter" inscription).
!
Remove tools, clean the inside of the housings with a hand vacuum cleaner, and
clean the bushing plates with a humid rag. To moisten the rag, use water containing
a common household cleaner. Then dry the bushing with a lint-free cloth.
!
Prepare the flanges of the cleaned busbar housings for assembly (see Page 21,
"Preparing busbar assembly").
!
Clean the contact surfaces of the busbar housing covers with a lint-free paper, and
apply a thin film of grease (see Page 21, "Preparing busbar assembly").
!
Put the covers on the prepared flanges and bolt them tight crosswise. Tightening
torque: 20 Nm.
The supporting frames of the transport units are bolted together at the panel joints
using connecting links at the front and a connecting plate at the rear.
at the hexagonal sleeve of the disconnector coupling rod
s
again. Tightening torque: 20 Nm.
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a
Hexagonal sleeve of the discon-
nector coupling rod
s
Lock nuts
a
by turning the hexagonal
a
.