Operating gear switch pursuant to its operational function Testing Switch Gear Operating gear switch pursuant to its operational function

Switchgear is a mechanism cut out of mainspring pursuant to spiral spring energy or air pressure ( pneumatic) or oil pressure ( hydraulic)

Mechanism activator of PMT use spiral spring in a state of closed to be seen from next side

Mechanism activator of PMT using spiral spring of open situation seen from next side

When filling spiral spring tension, one way wheel, that is wheel of No 2. turned around up at which did not turn around axis but adding to tend spiral spring. After spiral spring loaded (curiously), hence spiral spring ready to close PMT. By opening to sprag first spiral spring, that is by drawing to sprag this with conclusion bobbin ( coil closing), hence spiral spring will release desisted movement by second spragging Movement spiral spring from spragging first to spragging second have turned around wheel of No. 1 ( one ) 180 degree of turning around contacts power bar of PMT so that close, then PMT input

If spragging secondly pulled by opener bobbin ( coil trip), hence wheel of No. 1 ( first rotary) 180 degree again and 180 degree again and contact power bar contact peripatetic PMT open contacts of PMT last Trip PMT After PMT trip, spiral spring becoming not convulsively again because have not save energy and electrics network of PMT automatic move direct-current motor add to tend spiral spring by way of turning around wheel up at which did not turn around axis ( instruct spiral spring tension) Motor filler of spiral spring of direct-current motor have to moved by battery accumulator because in a state of trouble often alternating voltage supplier in building lose so that motor filler of spiral spring remain to earn to function with supply energy which battery supplier

Mechanism activator of PMT use spiral spring seen from from other sideing

Coil trip and of closing coil also use direct current tension which supply by battery Battery have to rely on for the efficacy of activity of PMT. Battery require to be looked after better and its condition require to be watched continually. Failure of PMT work to earn happened effect of battery too low its ability so that unable to coil to trip of PMT and finally PMT did not work if happened trouble current and can fatal cause and even instakasi earn burnt In practice, PMT made trip to through coil trip by relay ( appliance of proteksi) or by operator ( manual), while inclusion of PMT [pass/through] coil closing most conducted manually by operator

Comprehending mantenance repair of gear switch Testing Switch Gear Comprehending mantenance repair of gear switch

Kinds of switchgear for example is Gas Insulated Switchgear ( GIS) have active pressure 550kV, 300kV, 84kV, and 72,5kV; Gas Switchgear Combined ( GSC) owning active pressure 550kV, 300 kV, 245 kV, and 72,5kV

Gas Insulated Switchgear (GIS) 72,5kV

Gas Switchgear Combined (GSC) 300 kV

Testing operational switch gear Tests must be come out under the safety conditions required by the standards in force and under the responsibility of a component authority

Checking the CTs For : Relative direction of primary and secondary windings Transformation ratio

Tests on the cables Disengage the circuit-breaker. Make sure that no part are live. Close the earthing switch and check that the “earthing swirch closed “ position indicator appears

Electrical Power Plant Created by Power Gen. Team SMK PGRI 3 Malang 2009 THE END