Schneider Electric EM3555 Marine Instruments User Manual


 
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© 2011 Schneider Electric All Rights Reserved.
ZL0093-0A
11/2011
EM3555
Control Power
CONTROL POWER
Direct Connect Control Power (DC Control Power)
L1N L2 L3
1 2G
L1N L2 L3
1 2G
L1
1 2G
L2 L3
Direct Connect Control Power (Line to Neutral)
Line to Neutral from 90 VAC to 347 VAC (UL) or 300 VAC (CE)
1 2G
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 oating (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.)
FUSE RECOMMENDATIONS
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 sufcient 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.
WIRING NOTES
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).