Emerson 4015 Tasks to be Performed for Customer Integrated Systems, Grounding

Installation Instructions	IM584000300
Spec. No. 584000300 (Model 4015-X003)	Issue AB, April 3, 2013

TASKS TO BE PERFORMED FOR CUSTOMER INTEGRATED SYSTEMS

ALSO MAKE THE CONNECTIONS DESCRIBED UNDER “Tasks to Be Perform for All Installations” STARTING ON PAGE 25.

Grounding

Danger: Failure to follow proper grounding procedures can result in electric shock hazard to personnel or the risk of fire, should a ground fault occur.

For grounding requirements, refer to the current edition of the American National Standards Institute (ANSI) approved National Fire Protection Association's (NFPA) National Electrical Code (NEC), applicable local codes, and your specific site requirements. For operation in countries where the NEC is not recognized, follow applicable codes.

Refer to Figure 3-8for a complete system grounding scheme diagram.

Sub-Rack Grounding (Frame Ground)

When individual system components are furnished, the individual components must be grounded on site by the customer after installation into an IT rack. A cabinet grounding stud is located on the rear of the power and control sub-rack and distribution sub-rack. A tray grounding stud is located on the rear side panel of the battery tray. Refer to Figure 3-3for connection points.

NPG Configurations Only: Return Busbar (-Bus) Grounding Connection

The return busbar (–Bus) in a negative pole ground (NPG) configuration is to be connected to ground. A grounding connection point for the return busbar (-Bus) is provided on the negative bus in the power and control sub-rack. This connection can also be made on the rear of the load distribution sub-rack, if furnished. Only connect in one place. Refer to Figure 3-4for connection points.

HRMG Configurations Only: Bus Grounding Connection

A lead exits the rear of the power and control sub-rack in a High Resistance Midpoint Ground (HRMG) configuration. This lead MUST be connected directly to ground for proper operation of the mid-point grounding circuit and the ground fault detection circuit. Refer to Figure 3-5for connection point.

Caution: Failure to terminate this conductor to ground will render the system ground fault detection circuit and the ±200V DC voltage reference inoperable. It is essential to properly bond this lead to ground.

Note: This lead is 16 AWG, approximately 100” long, and terminated in a ring lug with a 1/4” clearance hole.

Chapter 3. Making Electrical Connections Page 17

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