NAL-12/12R type load switchDetailed product description：

NAL-12 load switch and NAL-12R load switch fuse combination electrical appliances can be equipped with grounding switches. Technical parameter table:

serial number	Name						unit	NAL－12D	NAL－12DR
one	rated voltage						kV	twelve	twelve
two	rated frequency						Hz	fifty	fifty
three	rated current						A	630（1250）	one hundred
four	rated		1-minute power frequency withstand voltage			To the ground, alternating with each other	kV	forty-two	forty-two
	Insulation level					isolation gap		forty-eight	forty-eight
			Lightning impulse withstand voltage (peak value)			To the ground, alternating with each other		seventy-five	seventy-five
						isolation gap		eighty-five	eighty-five
five	Rated short-circuit withstand current (Dynamic Stable Current)					load switch	kV	fifty
						grounding switch		sixteen
six	Rated short-circuit duration (Thermal stability time)					load switch	S	two
						grounding switch		two
seven	Rated short-circuit closing current (peak)						kV	fifty
eight						Active load breaking current	A	six hundred and thirty
						Closed loop breaking current		six hundred and thirty
	Rated breaking current					5% active load breaking current		thirty-one point five
						Cable charging current		ten
						Disconnect the capacity of the no-load transformer	kVA	one thousand two hundred and fifty
nine	Rated short-circuit breaking current (current limiting fuse)						kV		thirty-one point five
ten	Rated transfer current						A		one thousand and six hundred
eleven	mechanical life						time	two thousand	two thousand

Structural Characteristics Table

serial number	Name	unit	Parameters
one	Fracture distance	mm	≥212
two	Interphase center distance		one hundred and seventy
three	Just open and close speed	m/s	＞5
four	Positive pressure of the spring between the main contact blade and the contact	N	230±23
five	Closing operation torque	N.M	80-100
six	Three phase closing at different stages	mm	≤3
seven	Three phase disconnection at different stages		≤3
eight	The inherent opening time of the separation release device	ms	40~65
nine	main circuit resistance	μΩ	≤100

The rated current of the limiting fuse of the NAL-12DR load switch fuse combination is selected according to the transformer capacity, and the parameters are shown in the following table:

Transformer capacity (KVA)

one hundred

one hundred and twenty-five

one hundred and sixty

two hundred

two hundred and fifty

300/ thirty-one point five

four hundred

five hundred

six hundred and thirty

750/ eight hundred

one thousand

one thousand two hundred and fifty

Rated current of fuse (A)

sixteen

sixteen

sixteen

twenty

twenty-five

thirty-one point five

forty

fifty

sixty-three

eighty

eighty one hundred

one hundred one hundred and twenty-five

NAL12 series technical assembly drawing

NAL12-6K170R


NAL12-6K170RE


NALF12-6A170R


NALF12-6A170RE