Ormazabal cgmcosmos-2lv, Общее руководство по инструкции

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Safety elements
39
General instructions
cgmcosmos
system
Medium voltage switchgear and control gear, fully insulated in SF
6
gas up to 24 kV with external cable test device
IG-257-EN version 01; 03/02/2016
6 Safety elements
6.1 Acoustic earthing prevention alarm
The
ekor
.sas
acoustic alarm is associated with the
ekor
.vpis
voltage presence indicator and actuation of the earthing
shaft . The alarm is activated when there is voltage in the
medium voltage feeder of the corresponding functional
unit and the lever is inserted in the earthing switch shaft.
A sound then indicates that a short-circuit or zero voltage
may occur in the network if the operation is carried out.
Operation of the unit is assured within the same operating
range as the
ekor .vpis
unit associated with it
[12]
.
Fig. 6.1 ekor .sas unit
6.2 Interlocks
The switchgear is provided with safety locks, which ensure
the following conditions:
1. The switch-disconnector and the earthing switch
cannot both be closed at the same time.
2. The cubicles have an interlock that prevents access
to compartments for testing cables and medium
voltage cables while the earthing switch is not closed.
This earthing switch can not be opened in normal
operation if the compartments' covers are not in place.
6.2.1 Locking with a padlock
Each actuation shaft can be locked with a maximum of
three standardised padlocks, with a maximum handle
diameter of 8 mm.
Fig. 6.2 Locking with a padlock in feeder functions
In circuit-breaker functions with AV3 driving mechanism:
1.
Move the black slide from the interlocking position
until the lockable piece is released.
Fig. 6.3
Lockable piece released
[12]
[12] Optional element, incompatible with the use of ekor. ivds. units