DS-50 and DS-60 switchboard (1957 to 1999) Previous
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With the introduction of the V-60 series of meters, the older DS series of meters were superseded by the DS-50 and DS-60 line of switchboard meters. These meters have the same elements as the transformer-rated V-60 polyphase meters and follow the same numbering scheme. The DS-60 series was the standard version with a connecting plug used to complete the connections between the meter cradle and the case (removing the plug activates a built-in bypass for the current connections) and which could easily be exchanged for a test plug. The DS-60 cradle could also be removed from the case for repairs if needed. The DS-50 series was a lower-cost version with the cradle hard-wired to the case (the cradle could be moved forward for testing but an external test switch was required with these meters). DS-63
GE DS-50/60 meter manual