[CLAIMS] [Claim 1]
A system for diagnosing a contactor life using contactor coil current, the system comprising:
a voltage measurement unit measuring voltage of a contactor coil for a contactor;
a current measurement unit measuring current of the contactor coil;
a temperature measurement unit measuring a temperature of the contactor coil;
a confirmation unit confirming a real-time resistance value, a real-time voltage value, and a real-time current value for the contactor coil based on a temperature measurement value measured through the temperature measurement unit;
a storage unit storing an average value of current measured when the contactor operates to correspond to a predetermined number of times; and
a determination unit determining whether a life of the contactor is deteriorated based on whether the average value stored in the storage unit exceeds a predetermined threshold current value. [Claim 2]
The system of claim 1, wherein the current measurement unit measures the current of the contactor coil

when the contactor operates from an on state to an off state. [Claim 3]
The system of claim 1, wherein the confirmation unit confirms the real-time resistance value and the real-time voltage value according to the measured temperature measurement value based on a resistance value table which a resistance value of the contactor coil for each temperature value is matched with and is prestored in. [Claim 4]
The system of claim 3, wherein the confirmation unit confirms a calculation value calculated by the following equation as the real-time current value.
[Equation]
I=V/R
Here, V denotes the real-time voltage value and R denotes the real-time resistance value. [Claim 5]
The system of claim 1, wherein the storage unit stores an average value of current measured when the contactor operates 50 times as a first average value and stores an average value of current measured when the contactor additionally operates 10 times after 50-time operations as a second average value. [Claim 6]
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The system of claim 5, wherein the determination unit
determines that a malfunction occurs in the contactor to generate a warning signal when at least one of the first average value and the second average value exceeds the threshold current value, and
delivers a second average value additional storing signal to additionally store the second average value in the storage unit as determining that the malfunction does not occur in the contactor when the first average value and the second average value do not exceed the threshold current value. [Claim 7]
The system of claim 6, wherein the threshold current value is 50 mA. [Claim 8]
A method for diagnosing a contactor life using contactor coil current, the method comprising:
measuring, by a voltage measurement unit, voltage of a contactor coil for a contactor;
measuring, by a current measurement unit, current of the contactor coil;
measuring, by a temperature measurement unit, a temperature of the contactor coil;
confirming, by a confirmation unit, a real-time resistance value, a real-time voltage value, and a real-

time current value for the contactor coil based on a temperature measurement value measured through the temperature measurement unit;
storing, by a storage unit, an average value of current measured when the contactor operates to correspond to a predetermined number of times; and
determining, by a determination unit, whether a life of the contactor is deteriorated based on whether the average value stored in the storage unit exceeds a predetermined threshold current value. [Claim 9]
The method of claim 8, wherein the measuring of the current of the contactor coil includes measuring, by the current measurement unit, the current of the contactor coil when the contactor operates from an on state to an off state. [Claim 10]
The method of claim 8, wherein the confirming of the real-time resistance value, the real-time voltage value, and the real-time current value includes confirming, by the confirmation unit, the real-time resistance value and the real-time voltage value according to the measured temperature measurement value based on a resistance value table which a resistance value of the contactor coil for each temperature value is matched with and is prestored in.

[Claim 11]
The method of claim 10, wherein the confirmation unit confirms a calculation value calculated by the following equation as the real-time current value.
[Equation]
I=V/R
Here, V denotes the real-time voltage value and R denotes the real-time resistance value. [Claim 12]
The method of claim 8, wherein the storing of the average value of the current measured when the contactor operates to correspond to the predetermined number of times includes
storing, by the storage unit, an average value of current measured when the contactor operates 50 times as a first average value, and
storing, by the storage unit, an average value of current measured when the contactor additionally operates 10 times after 50-time operations as a second average value. [Claim 13]
The method of claim 12, wherein the determining of whether a malfunction of the contactor occurs includes
determining, by the determination unit, that the malfunction occurs in the contactor to generate a warning signal when at least one of the first average value and the

second average value exceeds the threshold current value, and
delivering a second average value additional storing signal to additionally store the second average value in the storage unit as determining, by the determination unit, that the malfunction does not occur in the contactor when the first average value and the second average value do not exceed the threshold current value. [Claim 14]
The method of claim 13, wherein the threshold current value is 50 mA.