LW31 series universal transfer switchDetailed product description：

purpose
The LW31 series universal transfer switch is mainly used for load starting and variable speed steering of complete electrical switchgear or three-phase asynchronous motors, as well as for switching between main and auxiliary circuits, and can fully replace other transfer switches.

Product model and its meaning


Main technical parameters

Model

lth

Ue

AC-21A

AC-22A

AC-23A

AC-2

AC-3

AC-4

AC-15

DC-13

le

le

le

P

le

P

le

P

le

P

le

le

A

V

A

A

A

kW

A

kW

A

kW

A

kW

A

A

LW31-20

twenty

four hundred and forty

twenty

twenty

fifteen

seven point five

fifteen

seven point five

eleven

five point five

three point five

one point five

four

two hundred and forty

five

one

one hundred and twenty

five

LW31-25

twenty-five

four hundred and forty

twenty-five

twenty-five

twenty-two

eleven

twenty-two

eleven

fifteen

seven point five

six point five

three

five

two hundred and forty

eight

one hundred and twenty

nine

LW25-32

thirty-two

four hundred and forty

thirty-two

thirty-two

thirty

fifteen

thirty

fifteen

twenty-two

eleven

eleven

five point five

six

two hundred and forty

fourteen

eleven

one hundred and twenty

twenty-five

LW31-50

fifty

four hundred and forty

fifty

forty

twenty-two

eighteen point five

seven point five

two hundred and forty

eleven

eleven

one hundred and twenty

LW31-75

seventy-five

four hundred and forty

seventy-five

seventy-five

seventy-two

forty-five

seventy-two

forty-five

forty-seven

twenty-four

twenty-three

eleven point five

two hundred and forty

one hundred and twenty

sixty

Number of operation cycles

no-load

eight thousand and five hundred

On load

one thousand and five hundred

total

ten thousand

Mechanical and electrical lifespan
Mechanical lifespan: 0.1 × 106 cycles, operating frequency of 120 cycles per hour.
Electrical lifespan: 0.03 × 106 cycles.

External dimensions and installation dimensions

Model	Section A				Dimensions (mm)
	one	two	three	four	□B	□C	D	E	F	G
LW31-20	thirty-seven	fifty	sixty-two	seventy-five	fifty-four	thirty-six	Φ44	twenty-eight	eight	Φ4.5
LW31-25	thirty-seven	fifty	sixty-two	seventy-five	seventy-two	fifty-eight	Φ59	thirty-two	nine	Φ4.5
LW31-32	thirty-five	forty-eight	sixty	seventy-three	seventy-two	fifty-eight	Φ59	thirty-two	nine	Φ4.5
LW31-50	forty	fifty-eight	seventy-five	ninety-three	one hundred and five	seventy-two	Φ80	forty-two	ten	Φ5.5
LW31-75	fifty-one	sixty-nine	eighty-seven	one hundred and five	one hundred and five	seventy-two	Φ80	forty-two	ten	Φ5.5

Model	Dimensions (mm)
	S	T	Z	A	B	C
LW31-20	Φ9.5	thirty-two	Φ3.2	thirty-six	forty-five	M4
LW31-25	Φ9.5	thirty-three	Φ3.2	fifty-eight	sixty-four	M4
LW31-32	Φ9.5	thirty-three	Φ3.2	fifty-eight	sixty-four	M4
LW31-50	Φ13	forty-six	Φ5.3	eighty-five	ninety	M5
LW31-75	Φ13	forty-six	Φ5.3	eighty-five	ninety	M5

LW31 series universal conversion switch