Application Guide

Installation Instructions Section 5876
Spec. No. 582140000 (Models 802
NLDB, 802NLEB and 802NL-B) Issue AT, April 26, 2013
Chapter 4. Making Electrical Connections Page 4-63
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.
MCA “POWER SHARE” FEATURE
Note: Requires MCA firmware version 2.0.0.11, or later.
The MCA Power Share feature allows you to connect a Spec. No. 582140000 Power
System (referred to as “New Power System” in this document) to an existing DC power
system (referred to as “Existing Power System” in this document) instead of extending or
completely replacing the Existing Power System.
Admonishments
General Safety
Danger: TECHNICIANS MUST FOLLOW APPROVED SAFETY PROCEDURES.
Performing the following procedures exposes technicians to hazards.
These procedures should be performed by qualified technicians familiar
with the hazards associated with this type of equipment. These hazards
may include shock, energy, and/or burns. To avoid these hazards:
a) The tasks should be performed in the order indicated.
b) Remove watches, rings, and other jewelry.
c) Prior to contacting any uninsulated surface or termination, use a
voltmeter to verify that no voltage or the expected voltage is present.
d) Wear eye protection, and use recommended tools.
e) Use insulated tools.
(To avoid danger to the installer or damage to the equipment, the
tools used in this procedure should have insulated grips. All exposed
metal shafts, extensions, handles, etc. should be completely insulated
with a minimum of three half-lapped layers of electrical tape. Ensure
that wrenches with more than one working end have only one end
exposed.)
DC Input/Output Voltages
Danger: Connecting the 582140000 Power System to an existing power system for
“Power Share” mode involves working on live equipment carrying live
loads. This system produces DC power and requires battery to be
connected to it. Although the DC voltage is not hazardously high, the
Rectifiers and/or battery can deliver large amounts of current. Exercise
extreme caution not to inadvertently contact or have any tool
inadvertently contact a battery terminal or exposed wire connected to a
battery terminal. NEVER allow a metal object, such as a tool, to contact
more than one termination at a time, or to simultaneously contact a
termination and a grounded object. Even a momentary short circuit can
cause explosion and injury. Remove watches, rings, or other jewelry
before connecting leads. Cover any live busbars with a canvas sheet to
prevent short circuits caused by falling tools or parts.
Requirements and Conditions
The two DC power systems must be connected in parallel as described in the
“PARALLELING THE EXISTING AND NEW POWER SYSTEMS” procedure.
Before paralleling the two systems, the following conditions must be met for proper
Power Share function.