ClipperCreek ACS Panduan Pengguna - Halaman 9

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ACS User's Manual

The Neutral at the service panel must be connected to earth ground somewhere

in the system on any of the three connection arrangements. Ground-fault

protection is not possible unless the Neutral (center-tap on the service trans-

former) is connected to an earth ground. If no ground is provided by the

electrical service, a grounding stake must be driven into the ground nearby,

following local electrical codes. The grounding stake must be connected to the

ground bar in the main breaker panel, and Neutral connected to ground at that

point.

Warning Local electrical codes must always be followed when

installing the grounding stake.

The following diagrams illustrate the 3 service transformer secondary connec-

tions most common in the United States.

Figure 2. 220/240V Single Phase

Figure 3. 208V 3-Phase, Wye-Connected

L2 (NOT USED)

120V

NEUTRAL

120V

L2 (NOT USED)

GROUND

L3 (NOT USED)

120V

Page 6

NEUTRAL

GROUND