In the bidding document, there is only the description of the requirements for the manufacturer's qualification of some equipment in the substation (telecommunications, circuit breaker, current transformer, lightning arrester and various relays), and there is no description of the requirements for the manufacturer's qualification of other equipment (such as transformer, voltage transformer,, disconnector, grounding switch, bus, capacitor, reactor, discharge coil, combination appliance, switchgear, etc.)
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