SureSwitch Relay Universal Electronic Upgrade for Mechanical Compressor Contactors
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Transcript of SureSwitch Relay Universal Electronic Upgrade for Mechanical Compressor Contactors
Education You Can Build On
Education CentralEngage, Apply, Retain
515 SureSwitchTM Universal Relay Overview
1 and 1.5 Pole, 40FLA, 208-240 VAC
Why Do Contactors Fail?
Pitting and Welding
of the Contacts
Contamination from
Bugs and Debris
Mechanical Contactor
• Open and Close at Random, opening and closing at peak of the Hz line-
LEADS TO ARCING!!!
SureSwitch Relay
• SureSwitch Relay Contacts are totally Sealed
• Only opens and closes when in the Zero Crossover Range-
NO ARCING NO DEBRIS
How Does SureSwitchTM Solve the Problem?
Zero Crossover (No Voltage)
60 Hz
No Voltage = No Arcing+ VAC
- VAC
1M CYCLES
300K CYCLES
SureSwitch Optical Reader Works at the
speed of light!
1-Pole• Only one line is
switched• No terminals for
unswitched line• Not common in
new units
1.5-Pole• Only one line is
switched• Terminals for
unswitched line• Most common in new
units
2-Pole• Both lines are
switched• Terminals for both
lines• Less common in new
units than 1.5-pole
Difference Between Contactors Poles
SureSwitch has been used on 2 Pole applications where it meets
local codes requirements
Installation and Wiring
Installation
• Mounts the Same as Traditional Contactor
– Mounting Plate Matches Traditional Contactor and can be mounted in any orientation
Wiring
• Wires the Same as a Mechanical Contactor 1 and 1.5 Pole 40 FLA
– Self-powered – Lug connections on most models
SureSwitch Universal Relay Contactor ReplacementSample Wiring Diagram
SureSwitchTM Relay Additional Features- Not an “old school” contactor!
• True 208/240VAC Line Brownout Protection – Protect system from operating during low conditions
during start up or while running– On/Off Option
• Random Start Delay Timer– Protects multi-unit installations from large surge on
restart – benefits utility and homeowner– 5 to 90 sec., On Power-Up & Brownout Recovery
• Short Cycle Protection – Ensure system pressure is stabilized before starting
compressor– On/Off Option
• Three-Color LED Status / Fault / Cycle Count Displays
No Arcing, Sealed Mechanical Relay with
a Microprocessor Brain
Benefit Feature Function
Easy to InstallSelf Powered / Universal Wiring No new wires needed
Lug Connectors Compressor and power wiring
Improved Reliability
Totally Sealed Switch Relay Protect from bugs or debris
Smart “Zero Cross” Switching ensures 5 times the life of contacts
Minimize contact damage, increased cycle life
Latching Compressor Relay No chatter, less VA draw
Line Voltage Brownout ProtectionNo low voltage operation, on start-up or during run
Short Cycle Protection System pressure equalization
Random start delayVariable (5 – 90s, On Power-Up &
Brownout Recovery)
Protects multi unit installations from large surge on restart
Easy to Service
Test Button Powered test of device
LED Status/Fault display Control and system info
Cycle Count Display Track product use history
Peace of Mind 5 Year Warranty Builds Confidence, Provides Value
Emerson SureSwitchTM Relay