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  1. hosseinshirmohammadi

    RTU

    Hi bacon4life Thanks a lot. we have this problem in 63kv/20kv substations, protective relays and control circuits use a 125v DC with the center point is solidly grounded so we have ~ +60 v between positive and chassis and ~ -60 v between negative and chassies and ground ,the RTU has a 48 v DC...
  2. hosseinshirmohammadi

    RTU

    Hi can any one tell me please why should we use positive ground DC in RTU's ?

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