Zakład Wytwórczy Aparatów Elektrycznych Sp. z o.o.
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4. OPERATING MANUAL
Disconnector’s switching is achieved by using an appropriate motor or manual operating mechanisms.
4.1. Notes about connecting activities
a) While disconnector’s or its earthing switch’s manoeuvring all safety at work rules applicable in installation’s
location should be respected.
b) Energized disconnector can be manoeuvred only when capacity of intermittent current will have negligible
value or any significant voltage change between any pole’s contact elements would not appear. Disconnector
equipped with commutating contacts is ready to switch off currents specified in technical data.
c) The disconnector must not be closed until its earthing switch has been opened.
d) Disconnector’s earthing switch can be manoeuvred from open to close position only:
• If the disconnector is in open position,
• After ensuring that earthing switch will be working under discharging current of the bushings, rails, incoming
supplies, short cables and power lines capacities, with current and voltage parameters specified in technical
data.
5. INSPECTIONS AND MAINTENANCE
5.1. Visual inspections
It is recommended to carry out visual inspections in accordance with rules being in force in switchgear or after
each failure or short circuit. Check in particular:
a) condition of current path’s central contacts,
b) condition of earthing switch’s contacts.
5.2. Periodic inspections
It is recommended to perform periodic and maintenance inspections in accordance with rules being in force
in switchgear. During check-up and maintenance the using of energetic devices rules and health and safety at
work rules have to be respected for safety of carrying out the job maintenance personnel.
Check and perform in particular:
a) condition of current paths central contacts,
b) condition of earthing switch contacts,
c) condition of mechanisms, bearings and connection components,
d) correction of achieving limit positions,
e) condition of anti-corrosion protective coatings,
f) lubricate current path’s central contacts and earthing switch’s contacts,
g) lubricate ball joints.
