GCK family of switchgear is suitable for use in power plant, substation, factories and mines, high-rise buildings and other power users of AC 50Hz, rated voltage 660V, distribution system of rated current up to 3150A, as power, lighting and power distribution equipment of electric energy conversion, distribution and control. The product conforms to the IEC439 standard, GB7 251 standard and "low voltage withdrawable switchgear" standard.