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Instruction Sheet 515-500
Instruction Sheet 515-500
June 30, 2008© S&C Electric Company
S&C Micro-AT
®
Source-Transfer Controls
Table of Contents
Field Programming and Operation
Section

Page
Section

Page
Introduction
Qualified Persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Read this Instruction Sheet . . . . . . . . . . . . . . . . . . . . . . 2
Retain this Instruction Sheet . . . . . . . . . . . . . . . . . . . . . 2
Proper Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Common-Bus Primary Selective System
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Split-Bus Primary Selective System Applications . . . . . . 5
Voltage Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Unbalance Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Overcurrent Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Supervisory Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Remote Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Test Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Communications Card . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Safety Information
Understanding Safety-Alert Messages . . . . . . . . . . . . . . 9
Following Safety Instructions . . . . . . . . . . . . . . . . . . . . . 9
Replacement Instructions and Labels . . . . . . . . . . . . . . . 9
Operating Description
Normal Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Transfer on Loss of Source Voltage . . . . . . . . . . . . . . . 10
Transfer on Return of Source Voltage . . . . . . . . . . . . . . 11
Transfer on Unbalance Condition . . . . . . . . . . . . . . . . . 11
Overcurrent-Lockout Condition . . . . . . . . . . . . . . . . . . . 12
Features
The Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Non-Numeric Items . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Ready-Only Items . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Field Adjustment and Programming
. . . . . . . . . . . .
17
Configure Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Voltage Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Current Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Time Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Test Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Operational Testing
Loss-of-Source Testing . . . . . . . . . . . . . . . . . . . . . . . . . 27
Overcurrent-Lockout Testing . . . . . . . . . . . . . . . . . . . . . 28
Before Walking Away . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Diagnostic Tools
Event Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Examine Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32
Specifications
Micro-AT Source-Transfer Controls . . . . . . . . . . . . . . . 33
Voltage-Sensing Arrangements
For Metal-Enclosed Switchgear Applications . . . . . . 33
Voltage-Sensing Arrangements
For Source-Transfer Pad-Mounted Gear
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Voltage-Sensing Arrangements
For Source-Transfer Vista UDS Applications . . . . . . . 34
Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
S&C Micro-AT Source-Transfer Control . . . . . . . . . . . . 35
Appendix
Non-Field Adjustable Items in the
Configure Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Non-Field Adjustable Items in the
Voltage Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Event Identification Code Numbers in the
Event Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Discrete Inputs in the Examine Menu . . . . . . . . . . . . 39
Discrete Outputs in the Examine Menu . . . . . . . . . . . 40
Spare Circuit Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Spare Front Panel Assemblies . . . . . . . . . . . . . . . . . . . 42
Static-Dissipative Work Surface . . . . . . . . . . . . . . . . . . 42 2 S&C Instruction Sheet 515-500
Qualified Persons
Ç

WARNING
The equipment covered by this publication must be installed, operated, and
maintained by qualified persons who are knowledgeable in the installation, operation,
and maintenance of electric power distribution equipment along with associated
hazards . A qualified person is one who is trained and competent in:
The skills and techniques necessary to distinguish exposed live parts from non-

live parts of electrical equipment .
The skills and techniques necessary to determine the proper approach distances

corresponding to the voltages to which the qualified person will be exposed .
The proper use of the special precautionary techniques, personal protective

equipment, insulating and shielding materials, and insulated tools for working on
or near exposed energized parts of electrical equipment .
These instructions are intended only for such qualified persons . They are not
intended to be a substitute for adequate training and experience in safety proce-
dures for this type of equipment .
Read this
Instruction Sheet
Thoroughly and carefully read this instruction sheet before installing or operating your
Micro-AT Source-Transfer Control . Familiarize yourself with Safety Information on
page 3 . The latest version is available online in PDF format at www .sandc .com . Select:
Support/Product Literature Library .
Retain this
Instruction Sheet
This instruction sheet should be available for reference wherever and whenever Micro-AT
Source-Transfer Control is to be used . Retain this instruction sheet in a location where
you can easily retrieve and refer to this publication .
Proper Application
Ç

CAUTION
The equipment in this publication must be selected for a specific application .
The application must be within the ratings furnished for the equipment .
Warranty
The warranty and/or obligations described in S&Cs standard conditions of sale, as
set forth in Price Sheet 150, plus any special warranty provisions, as set forth in the
applicable product-line specification bulletin, are exclusive . The remedies provided in
the former for breach of these warranties shall constitute immediate purchasers or end
users exclusive remedy and a fulfillment of all sellers liability . In no event shall sellers
liability to immediate purchaser or end user exceed the price of the specific product
which gives rise to immediate purchasers or end users claim . All other warranties
whether express or implied or arising by operation of law, course of dealing, usage of
trade or otherwise, are excluded . The only warranties are those stated in Price Sheet
150, and THERE ARE NO EXPRESS OR IMPLIED WARRANTIES OF MERCHANT-
ABILITY OR FITNESS FOR A PARTICULAR PURPOSE . ANY EXPRESS