Schneider Electric EM3555 Manual De Usuario

11

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Direct Connect Control Power (DC Control Power)

Direct Connect Control Power (Line to Neutral)

Line to Neutral from 90 VAC to 347 VAC (UL) or 300 VAC (CE)

Control Power Transformer (CPT) Connection

Direct Connect Control Power (Line to Line)

Line to Line  from 90VAC to 600 VAC (UL) (520 VAC for CE). In UL installations the 

lines may be floating (such as a delta). If any lines are tied to an earth (such as a corner 

grounded delta), see the Line to Neutral installation limits. In CE compliant installations, 

the lines must be neutral (earth) referenced at less than 300 VAC

L-N

The Control Power Transformer may be wired L-N or L-L. Output to meet meter input requirements

DC Control Power from 125 VDC to 300 VDC (UL and CE max.)

Keep the fuses close to the power source (obey local and national code 

requirements).

For selecting fuses and circuit breakers, use the following criteria:

•  Select current interrupt capacity based on the installation category 

and fault current capability.

•  Select over-current protection with a time delay.

•  The voltage rating should be sufficient for the input voltage applied.

•  Provide overcurrent protection and disconnecting means to protect 

the wiring. For DC installations, external circuit protection must be 

provided. Suggested: 0.5 A, time delay fuses.

•  The earth connection is required for electromagnetic compatibility 

(EMC) and is not a protective earth ground.

•  Use 14-24 gauge wire for all connections.

•  When tightening terminals, ensure that the correct torque is applied:  

3.5 - 4.4 in·lb (0.4-0.5 N·m).