FN18-12 series indoor high-voltage load switchDetailed product description：

The FN18-12 indoor high-voltage load switch has the advantages of advanced design, easy operation, small size, comprehensive functions, light weight, fast switching speed, and high reliability. Suitable for AC 50Hz, rated voltage 12KV, rated current 630A, and three-phase distribution systems, especially suitable for urban network renovation projects, high-rise buildings, and public facilities' ring network power supply. It is an ideal product for box type substations and transformer protection.

Main technical parameters of FN18-12 series indoor high-voltage load switch

Serial number	Component Name	Unit	FN18-12D/630	FN18-12DR/100-31.5
one	rated voltage	KV	twelve
two	highest frequency	Hz	fifty
three	rated current	A	six hundred and thirty	one hundred
four	1-minute power frequency withstand current	KV	Ground and phase 42, isolation and disconnection 48
	Lightning impulse withstand voltage		Ground and phase to phase 75, isolation and disconnection 85
five	spacing	mm	one hundred and seventy
six	Rated dynamic stable current	KA	fifty
seven	Rated thermal stability current	KA/S	20/2
eight	Rated cable charging current	A	ten
nine	Rated transfer current			one thousand and six hundred
ten	Disconnect the capacity of the no-load transformer	KVA	one thousand two hundred and fifty
eleven	Rated short-circuit breaking current (melting value)	KA		31.5～50
twelve	Rated short-circuit closing current (peak)		fifty
thirteen	Rated active load current breaking times		six hundred and thirty
fourteen	Rated thermal stability current of grounding switch	KA/S	16/2
fifteen	Rated active load current breaking times	time	one hundred
sixteen	mechanical life		two thousand

FN18-12 series indoor high-voltage load switch