Specifications

February 2007
CA08101001E For more information visit: www.eaton.com
16-33
Transfer Switches
16
Transfer Switch Equipment
ATC-600 IQ Transfer Controller
ATC-600
IQ Transfer Controller
ATC-600
Product Description
Eaton’s Cutler-Hammer ATC-600 is a
microprocessor-based logic controller
to be used with Cutler-Hammer trans-
fer switches. This device is door-
mounted and provides the operator
with an at-a-glance overview of switch
status and parameters, as well as key
diagnostic data. Real-time values for
volts and frequency can be viewed via
the front panel LED display, along with
an indication of the power source
currently in use.
The ATC-600 continuously monitors
either single-phase or 3-phase voltages
for Source 1, Source 2, and the load.
When the Source 1 voltage or frequency
is detected to be below the customer
programmed set points, transfer to
Source 2 is initiated. When the Source 2
voltage and frequency are detected to
be within the programmed parameters,
the transfer occurs. While the load is
connected to Source 2, the ATC-600
continues to monitor Source 1. As soon
as the Source 1 voltage and frequency
return to within the programmed
limits, and after a programmed time
delay, a re-transfer back to Source 1
is initiated.
The ATC-600 uses microprocessor
technology to provide the operator with
a vast array of selections. Depending
on the application, the user can
“customize” the ATC-600 to meet the
particular application. A summary
of several key selections is listed
in Table 16-39.
Application Description
The ATC-600 is equipped to display
history information either via the front
panel or over PowerNet. Source 1 and
Source 2 Run Time, Available Time,
and Connect Time are available, as
well as Load Energized Time, Number
of Transfers, and the Date, Time and
Reason for the Last 16 Transfers.
For communications capability, the
ATC-600 can be equipped with a PONI
card which will allow the user to com-
municate with the unit via Series III
software. All settings for purchased
options can be set from the faceplate
of the unit or downloaded over Power-
Net. Series III software allows for
charting of key historical data, as well
as providing the capability to monitor
and control the transfer switch from a
remote location.
For further information on PowerNet
products and software, see Section 26.
Table 16-39. Programming Selections

Optional features.

In Phase Frequency Difference.

Sync Time Allowance.
Product Specifications
Table 16-40. Specifications

Optional features.
Parameters Set Points
TDNE
TDEN
TDEC
TDES
0 to 1800 Seconds
0 to 1800 Seconds
0 to 1800 Seconds
0 to 120 Seconds
TDN

0 to 120 Seconds or
Based on Load Voltage
Decay (2 – 30% of
Nominal Voltage)
TDEF 0 to 6 Seconds
In Phase Enabled or Disabled
IPFD

0.0 to 3.0 Hz
SYNC

1 to 60 Minutes
Load
Sequencing

Up to 10 Devices
(Via Subnetwork)
Pre-Transfer
Signal Device

0 to 120 Seconds
Up to 10 Devices
(Via Subnetwork)
Plant Exerciser

Load or No Load Transfer
(Selectable)
Preferred Source
Selector

Source 1 or Source 2
or None
Sensing 3-Phase or 1-Phase
System Selection Utility/Generator or Dual
Utility or Dual Generator
Description Specification
Input Control Power Range 65 Vac rms to 160 Vac rms (50/60 Hz)
Voltage Measurements of Source 1 V
AB
Source 1 V
BC
Source 1 V
CA
Source 2 V
AB
Source 2 V
BC
Source 2 V
CA
Load V
AB
Load V
BC
Load V
CA
Voltage Measurement Range 0 to 790 Vac rms (50/60 Hz)
Voltage Measurement Accuracy ±2% of nominal input voltage
Frequency Measurement for Source 1 and Source 2
Frequency Measurement Range 40 Hz to 80 Hz
Frequency Measurement Accuracy ±0.1 Hz
Undervoltage Sensing Source 1 and Source 2
Undervoltage Dropout Range 50% to 90% of nominal voltage
Overvoltage Dropout Range

105% to 120% of nominal voltage
Underfrequency Dropout Range

90% to 100% of nominal frequency
Overfrequency Dropout Range

100% to 120% of nominal frequency
Contact Outputs:
Two Form A Contacts for Generator start
Four Form A Contacts for Control Functions
Three Form C Contacts for Control Functions
5 A 250 Vac; 5 A 30 Vdc
10 A 250 Vac; 10 A 30 Vdc
10 A 250 Vac; 10 A 30 Vdc
Communications Output
Over PowerNet (Optional)
PONI (Product Operated Network Interface)
Front Panel Indications:
Automatic Mode
Test Mode
Program Mode
Blinking LED indicates Automatic operation
LED illuminated indicating the unit is in the TEST mode
LED illuminated indicating the unit is in the Program
mode Blinking LED indicates user is viewing set points
in Program mode
LED Lights to Indicate
Source 1 Available (Amber), Source 2 Available (Amber),
Source 1 Connected (Green), Source 2 Connected (Red),
Source 1 Preferred (Red), Source 2 Preferred (Red),
Load Energized (Red)
LED Display to Indicate History Information
Set Points
Real-Time Clock
Environmental Temperature Range Operation: -20°C to +70°C Storage: -30°C to +85°C
Applicable Standards UL 1008, UBC and BOCA for Seismic Zone 4