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Emerson Network Power > United States > Products > Power Switching and Controls > Power Transfer Switches > ASCO Power Transfer Switch Feature Comparison

ASCO Power Transfer Switch Feature Comparison

Feature Comparison ATS Product Series
185 300 4000 7000
Intended Application Residential
Light Commercial		 Commercial
Light Industrial		 Industrial Mission Critical
Critical Power
Ampere sizes available 100 - 400 30 - 3,000 30 - 4,000 30 - 4,000
Phases Available Single Single or Three Single or Three Single or Three
Pole Counts Available 2 2, 3 or 4 2, 3 or 4 2, 3 or 4
Low Voltage 220 - 240V 115 - 600V 115 - 600V 115 - 600V
Medium Voltage N/A N/A N/A 5kV, 15kV
Product Type
Open Transition Transfer Switch Yes Yes Yes Yes
Service Entrance Rated Transfer Switch Yes Yes Yes Yes
Power Transfer Load Center Yes Yes N/A Yes
Closed-Transition Transfer Switch N/A N/A Yes Yes
Delayed-Transition Transfer Switch N/A N/A Yes Yes
Soft Load Transfer N/A N/A N/A Yes
Bypass-Isolation transfer Switch N/A N/A N/A Yes
Closed-Transition Bypass-Isolation TS N/A N/A N/A Yes
Delayed-Transition Bypass-Isolation TS N/A N/A N/A Yes
Soft Load Bypass-Isolation TS N/A N/A N/A Yes
Withstand and Close-On Ratings
WCR when used with any circuit breaker N/A N/A 10-100kA 10-100kA
WCR when used with specific circuit breakers 10kA - 35kA 22-100kA 22-100kA 22-100kA
WCR when used with current limiting fuses 100-200kA 100-200kA 100-200kA 100-200kA
Withstand Short Time Rating N/A N/A 36-65kA 36-65kA
Neutral Configuration
Solid Std. Std. Yes Yes
Switched N/A Yes Yes Yes
Overlapped N/A N/A N/A Yes
Voltage and Frequency Settings
Phase Selection Single Phase Single or Three Phase Single or Three Phase Single or Three Phase
Pick up Normal Source Voltage 198 Volts 90% or 95% 85 to 100% 85 to 100%
Drop out Normal Source Voltage 154-187 Volts 70% to 90% 70 to 98% 70 to 98%
Pick up Emergency Source Voltage 198 Volts 90% Fixed 85 to 100% 85 to 100%
Drop out Emergency Source Voltage 165 Volts 75% Fixed 70 to 98% 70 to 98%
Frequency 50 or 60 Hz 50 or 60 Hz 50 or 60 Hz 50 or 60 Hz
Pick up Emergency Source Frequency 48 or 57 Hz 95% Fixed 90 to 100% 90 to 100%
Drop out Emergency Source Frequency 43 or 51 Hz 85% Fixed 85 to 98% 85 to 98%
Normal Over Voltage Trip N/A N/A 102 to 115% 102 to 115%
Emergency Over Voltage Trip N/A N/A 102 to 115% 102 to 115%
Normal Over Frequency Trip N/A N/A 102 to 110% 102 to 110%
Emergency Over Frequency Trip N/A N/A 102 to 110% 102 to 110%
Pick up Normal Source Frequency N/A N/A 90 to 100% 90 to 100%
Drop out Normal Source Frequency N/A N/A 85 to 98% 85 to 98%
Normal & Emergency Voltage Unbalance N/A N/A Yes Yes
Time Delay Settings
Override Normal Source Momentary Outage 1 or 3 Seconds 1 or 3 Seconds 0 to 6 Seconds 0 to 6 Seconds
Transfer to Emergency 10 Seconds 0 to 5 Minutes 0 to 60 Minutes 0 to 60 Minutes
Re-transfer to Normal Utility Power Loss Mode 5 Minutes 1 Sec. to 30 Mins. 0 to 60 Minutes 0 to 60 Minutes
Engine Cool Down 2 or 5 Minutes 5 Minutes 0 to 60 Minutes 0 to 60 Minutes
Override Emergency Source Momentary Outage 4 Seconds 4 Seconds 0 to 60 Minutes 0 to 60 Minutes
Emergency Exerciser 7 Day 7 Day Programmable Programmable
Indication and Controls
Load Connected to Normal Yes Yes Yes Yes
Load Connected to Emergency Yes Yes Yes Yes
Normal Source Available Yes Yes Yes Yes
Emergency Source Available Yes Yes Yes Yes
Transfer Test Switch Yes Yes Yes Yes
Terminals for Remote Transfer Control Std. Std. Std. Std.
By-pass Time Delay Yes Yes Yes Yes
Transfer Inhibit N/A Yes Yes Yes
In-Phase Monitor N/A Yes Yes Yes
Load Disconnect Contacts with Time Delay N/A Std. Optional Optional
Event Log N/A N/A Yes Yes
Power Manager N/A N/A Optional Optional
Transfer Controls Lock Out N/A N/A Yes Optional
Enclosures
Type 1 Yes Yes Yes Yes
Type 3R Yes Yes Yes Yes
Type 4 N/A Yes Yes Yes
Type 4X N/A Yes Yes Yes
Type 12 N/A Yes Yes Yes
Connectivity
RS-485 Serial N/A Yes Yes Yes
Ethernet Yes Yes Yes Yes
Modbus® N/A N/A Yes Yes
Monitoring and Control via ASCO® Products Yes Yes Yes Yes
Accessories
Optional Accessories Field Kits Only Limited Limited Extensive
Modbus® is a registered trademark of Gould Inc. 

Publication Publication Number
Power Transfer Switch
Comparison Features		 Pub No. 3149