Fuse Recommendations - Trane E50 Series Installation, Operation And Maintenance Manual

Figure 2. Control Power Diagrams
#1: Direct Connect Control Power, Line-to-Line
Line-to-Line from 90 Vac to 600 Vac (UL). 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), refer to the
Line-to-Neutral installation limits. In CE
compliant installations, the lines must be
neutral (earth) referenced at less than 300 Vac

Fuse Recommendations

Keep the fuses close to the power source. For selecting fuses and circuit breakers, use the
following criteria:.
•
•
•
•
•
BAS-SVX073C-EN
L1 L2 L3
#3: DC Control power from 125 VDC
to 300 VDC (UL and CE max)
Select current interrupt capacity based on the installation category and fault current
capability
Select over-current protection with a time delay.
Use a voltage rating sufficient for the input voltage applied.
Provide over-current protection and disconnecting means to protect the wiring.
N N o o t t e e : : . For AC installations, use Trane AH04 or equivalent. For DC installations, provide
external circuit protection. Suggested: 0.5A, time delay fuses rated for DC operation at
or above the supply voltage
Use the earth connection (G) for electromagnetic compatibility (EMC), not a protective earth
ground.
G 1 2
N L1 L2 L3
#2: Line-to-Neutral from 90 Vac to
L-N
N L1 L2 L3
G 1 2
#4: Control power transformer may be wired
L-N or L-L. Output to meet meter
input requirements
G 1 2
347 Vac (UL) or 300 Vac (CE)
W W i i r r i i n n g g
G 1 2
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