An apparatus or system (100', 100") for preventing a battery rack (111, 112; 111', 112'; 111", 112") from being damaged by measuring a voltage, comprising: a voltage measuring unit (120, 120', 120") configured to measure a voltage value of a battery rack including a plurality of battery modules (111a, 111b... 111n, 112a, 112b... 112n); a comparing unit (130, 130', 130") configured to compare whether the voltage value measured by the voltage measuring unit is greater or smaller than a predetermined voltage limit value; and a relay controller (150, 150', 150") configured to control operation states of a precharge relay (141, 141', 141") and a main relay (143, 143', 143") based on the comparison result value obtained by the comparing unit before the operation state of the main relay is changed from an off state to an on state after the operation state of the precharge relay is changed to the on state, wherein the apparatus or system for preventing a battery rack from being damaged by measuring a voltage is provided in one or more battery racks each, and is configured to individually perform, on a corresponding battery rack, a process of measuring a voltage value of the corresponding battery rack, comparing the measured voltage value with the predetermined voltage limit value, and controlling operation states of the precharge relay and the main relay of the corresponding battery rack according to a result of the comparison, characterized in that the comparing unit is configured to transmit a voltage shortfall signal to the relay controller when the voltage value received from the voltage measuring unit is smaller than the predetermined voltage limit value, and and in that the relay controller is configured to change the operation state of the precharge relay from the on state to the off state, and maintain the operation state of the main relay in the off state, when the relay controller receives the voltage shortfall signal from the comparing unit. a voltage measuring unit (120, 120', 120") configured to measure a voltage value of a battery rack including a plurality of battery modules (111a, 111b... 111n, 112a, 112b... 112n); a comparing unit (130, 130', 130") configured to compare whether the voltage value measured by the voltage measuring unit is greater or smaller than a predetermined voltage limit value; and a relay controller (150, 150', 150") configured to control operation states of a precharge relay (141, 141', 141") and a main relay (143, 143', 143") based on the comparison result value obtained by the comparing unit before the operation state of the main relay is changed from an off state to an on state after the operation state of the precharge relay is changed to the on state, wherein the apparatus or system for preventing a battery rack from being damaged by measuring a voltage is provided in one or more battery racks each, and is configured to individually perform, on a corresponding battery rack, a process of measuring a voltage value of the corresponding battery rack, comparing the measured voltage value with the predetermined voltage limit value, and controlling operation states of the precharge relay and the main relay of the corresponding battery rack according to a result of the comparison, characterized in that the comparing unit is configured to transmit a voltage shortfall signal to the relay controller when the voltage value received from the voltage measuring unit is smaller than the predetermined voltage limit value, and and in that the relay controller is configured to change the operation state of the precharge relay from the on state to the off state, and maintain the operation state of the main relay in the off state, when the relay controller receives the voltage shortfall signal from the comparing unit.