Cobra Electronics CPI 2550 owner manual Power On and Off, Remote On/Off Switch, Power Consumption

Power On and Off

Operation

Power Consumption

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For each piece of equipment you will be operating from the inverter,you must determine the battery’sreserve capacity (how long the battery can deliver a specific amount of current — in automotivebatteries,usually 25 ampere)

or ampere-hourcapacity(a measure of how many amperes a battery can deliver for a specified length of time).

On/OffExampleSwitch to–OnReserve capacity:a battery with a reserve capacity of 180 minutes can deliver 25 ampere for 180 minutes before it is completely discharged.

Example – Ampere-hourcapacity:a battery with an ampere-hour capacity of 100 ampere-hours can deliver 5 ampere for 20 hours before it is completelydischarged.

To determinethe battery ampere-hour capacityyou require:

1. Determine how many watts each piece of equipment consumes. This can normally be found on the product label. If only the current draw is given, multiply the current draw by 115 to get the watt consumption.

2. Estimate the time (in hours) that each piece of equipment will be running between battery charging cycles.

3. Calculate the total watt-hours of energy consumption

On/Off Switch to Off

(power x operating time) using the average power consumption and the total estimated running time (in hours). Power x OperatingTime = Watt-Hours.

4.Divide the watt-hoursby 10 to determine how many power supply’s(12 volt) ampere-hourswill be consumed.

Remote On/Off Switch

Operation

GroundWiring

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There is a screw on the rear panel for ChassisGround. This is to connect the chassis of the inverter to ground.

The ChassisGround Screw must be connected to a grounding point, which will vary depending on where the unit is installed. Use a #8 AWG copper wire (preferablywith green/yellowinsulation)to connect the chassis ground screw to the grounding point.

RemoteInSwitcha vehicle: Connectthe ChassisGroundto the chassisof the vehicle.

In a boat: Connect to the Boat GroundingSystem.

In a fixedlocation:Connectthe ChassisGroundScrew to earth groundby connectingto a ground rod (a metal rod pounded into the earth) or other proper service entrance ground.

Remote Jack

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