Schneider Electric E4800 Manual De Usuario
930-110-01-B.00
PowerLogic
TM
EM4800 Series
04/2011
Installation
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Schneider Electric All Rights Reserved
11
Installing Potential Transformers for
Three-Phase Service Greater Than 277V
Three-Phase Service Greater Than 277V
Potential transformers are required when metering services greater than the
rated voltage input of the meter. Potential transformers are used to reduce
the line-to-neutral voltage of the service to 120V. The accuracy class should
be 0.3% or better, with a burden rating of 30VA.
rated voltage input of the meter. Potential transformers are used to reduce
the line-to-neutral voltage of the service to 120V. The accuracy class should
be 0.3% or better, with a burden rating of 30VA.
For applications in Canada, Measurement Canada approved potential
transformers are required. Measurement Canada requires an accuracy class
of 0.3% or better, with a 150VA rating.
transformers are required. Measurement Canada requires an accuracy class
of 0.3% or better, with a 150VA rating.
NOTE: Potential transformer burden depends on the control voltage
source. If control voltage is provided separately (not derived from the
metered voltage), then lower transformer burden may be acceptable.
Contact your local Schneider Electric representative for details.
source. If control voltage is provided separately (not derived from the
metered voltage), then lower transformer burden may be acceptable.
Contact your local Schneider Electric representative for details.
Mount the potential transformer enclosure between the supply voltage and
the PowerLogic meters as shown in Figure 5. Transformer configuration
must be Y||Y (wye-wye).
the PowerLogic meters as shown in Figure 5. Transformer configuration
must be Y||Y (wye-wye).
In Figure 5, the meter is powered from the potential transformers that are fed
from a breaker within the 600Y/347V panel. The CT cable is connected to the
shorting enclosure before connecting to the CTs in the panel.
from a breaker within the 600Y/347V panel. The CT cable is connected to the
shorting enclosure before connecting to the CTs in the panel.