2981473

Turn On Voltage (Max):	--
Coil Power:	--
Contact Material:	Silver Tin Oxide (AgSnO)
Operating Temperature:	-20°C ~ 55°C
Termination Style:	Spring Terminal
Mounting Type:	DIN Rail
Features:	--
Release Time:	10ms
Operate Time:	10ms
Turn Off Voltage (Min):	--
Series:	PSR
Switching Voltage:	250VAC, 250VDC - Max
Contact Rating (Current):	6A
Contact Form:	6PST-NO/NC (4 Form A, 2 Form B)
Coil Voltage:	120VAC/DC
Coil Current:	12.0mA
Coil Type:	--
Relay Type:	Safety
Part Status:	Active
Packaging:	Bulk

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Power Relays, Over 2 Amps

Power relays over 2 amps are electrical switch devices which allow power to be transferred from one source to another through an electrical circuit. The 1998 CDM (Circuit Design Model) serves as a platform for describing the applications, working principles, and associated features of a power relay.

Applications of Power Relays Over 2 Amps

Power relays over 2 amps are most commonly deployed in three particular applications – switchgear protection, pressure pump switching, and load controllers, as they are capable of handling higher amperage.Switchgear protection relies on an electromechanical relay to provide circuit interruption and current protection. An example of this would be a transformer protection system. A current transformer with a current coil surrounded by an auxiliary contact is used to measure primary current through the system and respond accordingly. The relay is activated when the primary current exceeds a pre-set range, and will interrupt the power supply to protect the transformer from the electrical fault.Pressure pumping involves using a power relay to control the pressure in a system by modulating the pump’s speed, start and stop the pump, or provide alarm and trip functions. This process is commonly used in off-grid power systems to conserve energy through efficient use of available resources.Load controllers are an ideal use for power relays over 2 amps, as they can handle large amounts of power. Under this application, the load controllers utilise the relay to reduce electric load during peak hours in order to save energy and reduce the strain on the electric system.

Working Principles of Power Relays Over 2 Amps

Power relays over 2 amps are so named because they can handle higher amperages than relays which only have 1 amp capability. Power relays can work in either an open or a closed circuit.In an open circuit, the relay requires a relatively low current to activate and the power can flow from the power source through the relay to the load. This mode of operation is commonly used for light and motor control applications.In closed circuit configuration, a higher current is required to activate the relay and the power passes through the relay from the source — then it is looped-back to the source. Closed circuit operations are most often used in switched-mode power supplies, as they enable the power to be switched off and then switched back on.

Features of a Power Relays Over 2 Amps

The various features of a power relay can be seen in the CDM. This document outlines certain trademarks such as instantaneous overcurrent protection, quick-make and shorting contacts, as well as idle-Off and override options.One major feature of a power relays is the ability to be switched on and off quickly. As their activation is highly sensitive, relays are also capable of activating even when a current sensitivity of ≈ 5% is present, such as when 16 V DC is applied with a maximum of 25 V DC.Shunt trip and timed delay contacts are also featured in a power relay, which allow for the power supply to be deactivated for a pre-set period. This is invaluable for applications where it is necessary to deactivate the power for a short period before being switched back on, as it provides increased protection against overload.The strength of these relays is further demonstrated through their ability to handle up to 8500  of inrush load, and up to 600 A of steady state current. The use of contacts, allowing the relays to switch on and off instantly, also prevents arcing from occurring on the switches, further adding to the durability of the relays.

Conclusion

Power relays over 2 amps are a versatile and reliable switch device, capable of handling higher currents for switchgear protection, pressure pumping, and load control applications. Their features include quick-make and shorting contact, shunt trip and timed delay contacts, and inrush load handling of up to 8500 . With their increased amperage handling ability, power relays over 2 amps are an ideal choice for a multitude of similar applications.

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