<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0203</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2009-10-16</periodOfReport>

    <dateOfOriginalSubmission>2009-10-26</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000880285</issuerCik>
        <issuerName>ENBRIDGE ENERGY PARTNERS LP</issuerName>
        <issuerTradingSymbol>EEP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000898286</rptOwnerCik>
            <rptOwnerName>CAISSE DE DEPOT ET PLACEMENT DU QUEBEC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1000 PLACE JEAN-PAUL RIOPELLE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MONTREAL</rptOwnerCity>
            <rptOwnerState>A8</rptOwnerState>
            <rptOwnerZipCode>H2Z 2B3</rptOwnerZipCode>
            <rptOwnerStateDescription>QUEBEC, CANADA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001490160</rptOwnerCik>
            <rptOwnerName>CDP Investissements Inc.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1000 PLACE JEAN PAUL RIOPELLE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MONTREAL</rptOwnerCity>
            <rptOwnerState>A8</rptOwnerState>
            <rptOwnerZipCode>H2Z 2B3</rptOwnerZipCode>
            <rptOwnerStateDescription>QUEBEC, CANADA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001490158</rptOwnerCik>
            <rptOwnerName>CDP Infrastructures Fund G.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1000 PLACE-JEAN-PAUL RIOPELLE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MONTREAL</rptOwnerCity>
            <rptOwnerState>A8</rptOwnerState>
            <rptOwnerZipCode>H2Z2B3</rptOwnerZipCode>
            <rptOwnerStateDescription>QUEBEC, CANADA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001490159</rptOwnerCik>
            <rptOwnerName>CDP Infrastructures Fund Inc.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>1000 PLACE JEAN PAUL RIOPELLE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MONTREAL</rptOwnerCity>
            <rptOwnerState>A8</rptOwnerState>
            <rptOwnerZipCode>H2Z 2B3</rptOwnerZipCode>
            <rptOwnerStateDescription>QUEBEC, CANADA</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Units</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>12827152</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">This Amendment to Form 3 is filed with the Securities and Exchange Commission (&quot;SEC&quot;) to amend certain information set forth in the Form 3 originally filed by certain of the Reporting Persons with the SEC on October 26, 2009 (the &quot;Original Form 3&quot;).  This Amendment corrects the ownership (form and otherwise) of the reported securities, adds the &quot;Other Reporting Persons&quot; and amends and restates the information included under the caption &quot;Remarks&quot; of the Original Form 3.</footnote>
        <footnote id="F2">The reported securities are indirectly beneficially owned by CDP Investissements Inc., CDP Infrastructures Fund Inc. and Caisse de Depot et Placement du Quebec by virtue of each of the foregoing being a general partner in CDP Infrastructures Fund G.P., which is the direct beneficial owner of the reported securities.  Each Reporting Person disclaims beneficial ownership of the reported securities, except to the extent of its respective pecuniary interest therein.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>CAISSE DE DEPOT ET PLACEMENT DU QUEBEC By: /s/ Soulef Hadjoudj, Legal Counsel</signatureName>
        <signatureDate>2010-04-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>CDP INFRASTRUCTURES FUND G.P. By:  CAISSE DE DEPOT ET PLACEMENT DU QUEBEC, a general partner, By:  /s/ Soulef Hadjoudj, Legal Counsel</signatureName>
        <signatureDate>2010-04-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>CDP INVESTISSEMENTS INC. By:  /s/ Normand Provost, Director and President</signatureName>
        <signatureDate>2010-04-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>CDP INVESTISSEMENTS INC. By: /s/ Eve Giard, Secretary</signatureName>
        <signatureDate>2010-04-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>CDP INFRASTRUCTURES FUND INC. By: Normand Provost, Director and President</signatureName>
        <signatureDate>2010-04-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>CDP INFRASTRUCTURES FUND INC. By: /s/ Eve Giard, Secretary</signatureName>
        <signatureDate>2010-04-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
