2
Instruction Booklet
IB48088
Effective July 2021
Instructions for Eaton’s 7.2 kV Ampgard AR
(arc resistant motor control center)
(Compliant to IEEE C37.20.7-2017)
EATON
www.eaton.com
m
WARNING
HAZARD OF ELECTRICAL SHOCK OR BURN.
THE EQUIPMENT MUST BE OPERATED WITHIN ITS NAMEPLATE RATINGS.
OPERATING THE EQUIPMENT OUTSIDE OF ITS RATINGS MAY CAUSE FAIL-
URE RESULTING IN PROPERTY DAMAGE, SEVERE PERSONAL INJURY, OR
DEATH.
ALL APPLICABLE SAFETY CODES, SAFETY STANDARDS, AND SAFETY REG-
ULATIONS MUST BE STRICTLY ADHERED TO WHEN INSTALLING, OPERAT-
ING, OR MAINTAINING THIS EQUIPMENT.
m
WARNING
SAFETY WARNINGS
READ AND UNDERSTAND THESE INSTRUCTIONS BEFORE ATTEMPTING
INSTALLATION, OPERATION, OR MAINTENANCE OF THE EQUIPMENT.
• OBSERVE NATIONAL ELECTRICAL CODE (NEC), OCCUPATIONAL SAFETY
AND HEALTH ACT (OSHA), AND LOCAL PROCEDURES AND STANDARDS.
THIS INCLUDES VISUAL INSPECTIONS WHILE THE DOOR IS OPEN,
MAKING ANY ADJUSTMENTS INSIDE OR OUTSIDE THE ENCLOSURE,
PERFORMING MAINTENANCE, AND/OR INSTALLING REPLACEMENT
PARTS.
• THE END USER IS RESPONSIBLE FOR CONFORMING TO ALL
APPLICABLE CODE REQUIREMENTS WITH RESPECT TO GROUNDING
THE EQUIPMENT.
• ENSURE THAT YOU ARE WEARING PROPER PERSONAL PROTECTIVE
EQUIPMENT (PPE) TO SAFEGUARD YOURSELF AGAINST THE HAZARDS
PRESENT DUE TO MEDIUM VOLTAGE PROXIMITY.
• DISCONNECT ALL LOW VOLTAGE AND MEDIUM VOLTAGE POWER
SOURCES BEFORE STARTING ANY WORK ON THE EQUIPMENT PER
OSHA AND LOCKOUT PROCEDURES.
• VERIFY THAT THE VOLTAGE HAS BEEN REMOVED.
• DE-ENERGIZE THE EQUIPMENT BY OPERATING THE ISOLATION SWITCH
TO THE OPEN POSITION. NEVER LEAVE THE ISOLATION SWITCH IN AN
INTERMEDIATE POSITION. ALWAYS MOVE THE HANDLE TO THE FULLY
OPEN OR FULLY CLOSED POSITION.
• USE ADEQUATE FALL PROTECTION WHEN WORKING ABOVE GROUND
LEVEL.
Section 1. Introduction
1.1 Purpose
The purpose of this instruction booklet is to address typical consid-
erations for the application of Ampgard AR arc resistant equipment.
Included in these instructions are:
•
Equipment ratings;
•
Receiving, handling, and storing the equipment;
•
Physical constraints of the job site;
•
Installation, operation, and maintenance; and
•
Installation of the plenum and duct.
The purpose of Ampgard AR is to control and protect medium
voltage motors. But it may also be used as a feeder for transform-
ers, capacitors, and other loads. Ampgard AR provides a wide
array of motor starter configurations such as full voltage reversing/
non-reversing starters, and reduced voltage starters such as reactor,
auto-transformer, and solid state starters.
Equipment qualified as arc resistant in accordance to IEEE C37.20.7-
2017 is intended to provide an additional degree of protection to
personnel performing normal operating duties in close proximity
to the equipment while the equipment is operating under normal
conditions. Normal operating duties include operations such as
opening or closing switching devices, connecting and disconnecting
withdrawable parts, reading of measuring instruments, monitoring
equipment, etc. Removing or replacing energized primary compo-
nents (e.g.: fuses or any other removable primary component) and
activities required to carry out during maintenance are not consid-
ered to be normal operations.
The performance of this equipment is greatly influenced by the
installation conditions, protective scheme, grounding method, and
the actions of the operator. It cannot be assumed that the presence
of the arc resistant equipment eliminates all conditions that may
constitute a risk to the operator. Application of arc resistant equip-
ment does not supersede the requirement of adequate personal
protective equipment (PPE).
While this instruction booklet primarily discusses a full-voltage
starter configuration, the same principle applies to other starter
applications supported. It is not the intent of this instruction
booklet to cover all possible contingencies, variations, and details
that may arise during installation, operation, or maintenance of this
equipment. If further information is desired regarding this product,
contact your local Eaton sales office.
1.2 Strategy
To properly apply the arc resistant equipment, both the physical
installation and electrical protection devices should be coordinated
with the equipment ratings. The electrical protection should coor-
dinate with the rated arcing duration and rated internal arcing short-
circuit current for the equipment to perform its intended function.
1.3 Identification
A rating nameplate is located on the door of each controller.
Specified on this nameplate are the controller’s type and ratings as
required by the industry standards. Also, contained on this name
plate is the factory’s general order number. This number should be
provided to Eaton if a question should arise concerning the equip-
ment or if renewal parts are required.
Arc resistant equipment also includes an arc rating nameplate.
Specified on this nameplate are the arc fault current and time dura-
tion.
Refer to
for the typical locations of the rating nameplates.
