*7.1. Target of Voltage, Frequency Variation and Stabilization Time*

With regard to synchronization of MCFC, ESS and diesel generation, the voltage, frequency variation, and frequency variation and stabilization time in the transient state of disconnection from the grid were tested with reference to the Korean Register of Shipping, "Class 6 Electrical Equipment and Control Systems" in Table 9 [36].

**Table 9.** Rules for the classification of electrical installation and control systems of the Korean Register of Shipping.

