ABB UniSec Instrukcja obsługi i konserwacji - Strona 10
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10
U N I S E C D I G I TA L M A N U A L E D I F U N Z I O N A M E N TO E M A N U T E N Z I O N E
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3. Replacement of wireless sensors
and concentrator
the compartment, make sure that the circuit-breaker
and disconnector (if present) are in the open position.
Check that the cables are de-energized and that the
earthing switch is open. Make sure that the cables are
not supplied in any way.
If maintenance operations are required in the low
voltage compartment, first make sure that the
compactment is de-energized
• Consult operation and maintenance manual
1VFM200005 for details about tightening torque
and other values
• The maintenance work must be performed using
the tools described in sect. 4.1 of operation and
maintenance manual 1VFM200005
• Consult the circuit diagram supplied with the
switchgear for details about electrical
applications
• After installing electrical applications, make sure
that the wires and cabling do not touch moving
components
Package content
Wireless
sensor
WARNING
The following operations require access to
the cable compartment. Before accessing
NOTE
CAUTION
both the concentrator and all the sensors
in the panel must be replaced using the
new components provided in the kit.
The sensors in the kit are already synchronized
with the concentrator
WARNING
If the sensors on the busbars must be
replaced, make sure that the busbar
compartment is de-energized before proceeding with
any operation
a) Remove the old sensor
• Open the clip
• Release the strap
b) Installation of a new sensor
• Assemble each sensor in the correct phase as
described in the instructions provided in the
kit.
NOTE
the contact tab must be positioned directly
on the sheath or copper busbar. Make sure
that the tab is not on a level with screws or holes
MDC4 -M
Metallic terminal