Calculate unbalanced load

[Becker]

Hi,

I´ve made a function which is calculating the "unbalanced load" from grid ("Schieflast").
but in the case, when 2 values are the same I get "0".
example:
I1 = 12A
I2 = -15A
I3 = -15A

[
    {
        "id": "bc97dbc59e7fba8b",
        "type": "inject",
        "z": "9f6752b0.b55988",
        "name": "",
        "props": [
            {
                "p": "payload"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "{\"I1\":12,\"I2\":-15,\"I3\":-15}",
        "payloadType": "json",
        "x": 450,
        "y": 1500,
        "wires": [
            [
                "b1cf5dccc16d85e3",
                "88d1c3acdc0c6f43"
            ]
        ]
    },
    {
        "id": "b1cf5dccc16d85e3",
        "type": "function",
        "z": "9f6752b0.b55988",
        "name": "Schieflast",
        "func": "var I1 = msg.payload.I1;\nvar I2 = msg.payload.I2;\nvar I3 = msg.payload.I3;\nvar Ia = I1-I2;\nvar Ib = I1-I3;\nvar Ic = I2-I3;\nvar Iaa = Math.abs(Ia);\nvar Ibb = Math.abs(Ib);\nvar Icc = Math.abs(Ic);\nif (Iaa > Ibb && Icc ) {\n    I = Iaa;\n} \nelse if (Ibb > Iaa && Icc) {\n    I = Ibb;\n}\nelse if (Icc > Iaa && Ibb) {\n    I = Icc;\n}\nmsg.payload = I\nmsg.payload = msg.payload.toFixed(1).replace('.', ',');\nmsg.topic = \"Schieflast\";\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 840,
        "y": 1540,
        "wires": [
            [
                "88d1c3acdc0c6f43"
            ]
        ]
    },
    {
        "id": "88d1c3acdc0c6f43",
        "type": "debug",
        "z": "9f6752b0.b55988",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "false",
        "statusVal": "",
        "statusType": "auto",
        "x": 1380,
        "y": 1560,
        "wires": []
    }
]

with "or" ( || ) I get 0

maybe there is a simple function in JS for this case

[E1cid]

if (Iaa > Ibb && Icc ) 

should be

if (Iaa > Ibb && Iaa > Icc )  

But if you require the max differnce in load use Math.max()

var I1 = msg.payload.I1;
var I2 = msg.payload.I2;
var I3 = msg.payload.I3;
var max = Math.max(I1,I2,I3);
var Ia = max - I1;
var Ib = max - I2;
var Ic = max - I3;
I = Math.max(Ia,Ib,Ic);
msg.payload = I
msg.payload = msg.payload.toFixed(1).replace('.', ',');
msg.topic = "Schieflast";
return msg;