LW26-32H/63H 3-Level 7-Position Welding Transformer Cam Switch

Name: LW26-32H/63H 3-Level 7-Position Welding Transformer Cam Switch
Brand: Newtrend or OEM brand
SKU: 1770408375167754240

Description

LW26-32H LW26-63H 32A 63A 3 LEVELS 7 POSITIONS welding transformer windings switching over Rotary Switch

Rotary switches LW26 series

The rotary switches LW26 series are produced for switching on/off electrical circuits with commutated current from
20 to 160A. They are designed on the bases of the rotor-eccentric switching on which is realized through turning
of the handle to 60 or 90 degrees. The normal operation is used for commutation of two, three or four conductor
systems. There are special rotary switches that switch on under given connection schemes and are used to
control motors, electric welding machines and other consumers.

Documentation corresponding to the product:
Standard: EN 60947-1; EN 60947-3-1

Technical data:
* Power supply voltage: 230/400V; 50Hz
* Insulation voltage: 690V
* Impulse voltage wear resistance: 6000V
* Mechanical wear resistance: 3×105 commutation cycles
* Operation temperature: -10 ~ +50 ℃
* Humidity: 35 – 85% RH
* Commuting capacity: up to 160A according to the tables
* Plastic: UV rays wear resistance
* IP code:
– IP42 for the ordinary breakers mounted in a panel
– IP65 for the breakers offered in a box
* Cable connection: screw joining
* Tightening moment of the bolt: 1.33N
* Maximum section of the power supply conductors: according to the dimensions table
* Weight: according to the number of the contacts
Mounting:
* directly to the control panel
* thickness of the surface to which it is mounted: max 5mm

Model	Characteristics	Current Available	Positions
LW26 -** 0-1-2-3	Acts with selectivity up to 3 different circuits, single-phase operation	20/25/32/63	4 (0-1-2-3)
LW26 -** 0-1-2-3-4	Acts with selectivity in up to 4 different circuits, single-phase operation	20/25/32/63	5 (0-1-2-3-4)
LW26 -** 0-Y-D	Used for 3 position switching, O-star-delta, motor starter switch	25/32/63	3 (0-Y-D)
LW26 -** 6S/4	Used for two speed motor control; switching over between charging	25/32/63	3 (1-0-2)
LW26 -** YH3/3	Used for line meters in three-phase systems	20	4 (0-RS-ST-TR)
LW26 -** YH5/3	Used for voltage switching over	20	7 (TR-ST-RS-0- RN-SN-TN)
LW26 -** LH3/3	Used for amperemeter switching on to current transformers	20	4 (0-R-S-T)
LW26 -** 6N/3	Used for phase inversion / rotation in three-phase system	20/32/63/125/160	3 (1-0-2)
LW26 -** 6Q/2	Used for three-poles switching on; motor starting and stopping; voltage on/off	20/32/63/125/160	2 (0-1)
LW26 -** D0081/1	Transfer switch (switching) monopolar	125/160	3 (1-0-2)
LW26 -** D0723/3	Transfer switch (switching) tripolar	125/160	3 (1-0-2)
LW26 -** D1050/4	Transfer switch (switching) tetrapolar	125/160	3 (1-0-2)

Description	LW26-20	LW26-25	LW26-32	LW26-63	LW26-125	LW26-160
Thermal Current (Ith)	20 A	25 A	32 A	63 A	125 A	160 A
Working Voltage (Ue)	240V	440V	240V	440V	240V	440V	240V	440V	240V	440V	240V	440V
Working Current (Ie)	A
AC21/AC22	20	25	32	63	100	150
AC23	15	22	30	57	90	135
AC2	15	22	30	57	90	135
AC3	11	15	22	36	75	95
AC4	3,5	6,5	11	15	30	55
AC15	5	4	8	5	14	6	***	***	***
Power	kW
AC23	3,7/2,5	7,5/3,7	5,5/3	11/5,5	7,5/4	15/7,5	15/10	30/18,5	30/15	45/22	37/22	75/37
AC2	4	7,5	5,5	11	7,5	15	18,5	30	30	45	37	55
AC3	3/2,2	5,5/3	4/3	7,5/3,7	5,5/4	11/5,5	11/6	18,5/11	15/7,5	30/13	22/11	37/18,5
AC4	0,55/0,75	1,5/1,5	1,5/1,1	3/2,2	2,7/1,5	5,5/3	5,5/2,4	7,5/4	6/3	12/5,5	10/4	15/7,5

Description

LW26-20

LW26-25

LW26-32

LW26-63

LW26-125

LW26-160

Thermal Current (Ith)

20 A

25 A

32 A

63 A

125 A

160 A

Working Voltage (Ue)

240V

440V

240V

440V

240V

440V

240V

440V

240V

440V

240V

440V

Working Current (Ie)

AC21/AC22

100

150

AC23

135

AC2

135

AC3

AC4

3,5

6,5

AC15

***

Power

AC23

3,7/2,5

7,5/3,7

5,5/3

11/5,5

7,5/4

15/7,5

15/10

30/18,5

30/15

45/22

37/22

75/37

AC2

7,5

5,5

7,5

18,5

AC3

3/2,2

5,5/3

4/3

7,5/3,7

5,5/4

11/5,5

11/6

18,5/11

15/7,5

30/13

22/11

37/18,5

AC4

0,55/0,75

1,5/1,5

1,5/1,1

3/2,2

2,7/1,5

5,5/3

5,5/2,4

7,5/4

6/3

12/5,5

10/4

15/7,5

Model	Front Plate	A	B	C	E	F	L	D1	D2
LW26-20	Square	48	48	43	36	36	22+9.6n	Φ8.5	Φ4.5
LW26-20*	Retangular	48	60	43	36	36	22+9.6n	Φ8.5	Φ4.5
LW26-25	Square	48	48	45	36	36	23+12.8n	Φ8.5	Φ4.5
LW26-32	Square	64	64	58	48	48	29.2+12.8n	Φ10	Φ4.5
LW26-63	Square	64	64	66	48	48	29.2+21.5n	Φ10	Φ4.5
LW26-125	Square	88	88	84	68	68	35+26.5n	Φ13	Φ6
LW26-160	Square	88	88	88	68	68	35+32.5n	Φ13	Φ6

* n = number of modules

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for LW26-32H/63H 3-Level 7-Position Welding Transformer Cam Switch.

📥

Official Technical Datasheet (PDF) Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.

📐

2D/3D CAD & Dimensional Drawings STEP, DXF, and PDF CAD drawing files for panel builders and switchgear designers.

Technical FAQ & Selection Guide

💡 Frequently Asked Technical Questions & Selection Guide

Pure engineering specifications, tripping curve parameters, and electrical selection guidance for panel builders and system designers.

Voltage & Load Sizing

How to verify rated operational voltage, frequency, and load duty cycle?

Verify that the nominal line voltage (AC 230V single-phase or 400V/415V/690V three-phase at 50/60Hz, or DC voltage ratings) falls within the continuous maximum operating limits of the device. Check duty cycle ratings (continuous vs intermittent duty) to ensure thermal stability under full load.

Protection & Environment

What ingress protection (IP Rating) and environmental enclosures are recommended?

For clean indoor electrical rooms, standard IP20 modular DIN-rail housings are recommended. For outdoor, industrial washdown, or dusty environments, mount components inside weatherproof enclosures rated IP65/IP66 with UV-resistant polycarbonate or powder-coated steel enclosures equipped with compression cable glands.

Selectivity & Grading

How to ensure upstream and downstream coordination in power distribution boards?

Ensure proper discrimination by grading current thresholds and tripping time delays: upstream devices should have higher current ratings and intentional short-time delays (Class S), allowing downstream branch MCBs to clear localized faults without blacking out the entire facility.

Installation & Mounting

What mounting rails, busbars, and spatial clearances are required?

Components mount on standard symmetrical 35mm DIN rail (EN 60715 / TH35-7.5) or backplate screw fixings. Maintain recommended top/bottom ventilation gaps (typically 30–50mm) to ensure unrestricted air convection, and use standard pin/fork comb busbars to minimize contact resistance and wiring errors.

Conductor & Torque Sizing

What conductor sizes and terminal tightening torques should be applied?

Select copper or aluminum conductor cross-sections complying with IEC 60364-5-52 current-carrying capacity tables based on continuous load. Always use a calibrated torque screwdriver or torque wrench to tighten terminal screws to the manufacturer-specified torque to prevent hot-spot degradation and loose connections.