Filter
Top Products
Installation Instructions IM584000300
Spec. No. 584000300 (Model 4015-X003) Issue AB, April 3, 2013
Chapter 3. Making Electrical Connections Page 17
This document is property of Emerson Network Power, Energy Systems, North America, Inc. and contains confidential and proprietary information owned by Emerson Network Power, Energy
Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
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 3-8 for 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
3-3 for 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 3-4 for 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 3-5 for 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.