GW28 series, mainly used in AC 50Hz, rated voltage 440V and below, and rated current to 315A electrical lines as well, are used for manual infrequent switching or disconnecting circuit for control box conversion. They can also directly control three-phase asynchronous motors and be used for main command control and circuit measurement. The products are widely used to replace all kinds of ChangeOver Switches, and can be used as circuit control switches, test equipment switches, motor control switches and master switches, and welding machines with ChangeOver Switches, etc. Meet the standard : the main circuit conversion and direct control conversion switch meet The ChangeOver Switch for master control conforms to GB 14048.3,GB14048.5and IEC60947-3、IEC60947-5-1.
①: Universal Change-Over Switch
②: Design code
③: Rated operating current
④:Number of poles
Classification
1.By use :
Transfer switch for main circuit conversion
Transfer switch for direct control of motor
Transfer switch for direct command control and measurement
2.By mode of operation :
Locating type
Momentary type
Locating and momentary type
3.By contact system :
The locating type transfer switch has 1 to 12 layers (but only 8 layers in 63A).
The momentary type transfer switch has 1 to 3 layers.
The transfer switch for direct control of the motor mainly has 1~6 layers.
4.By angle
30°; 45º;60º; 90º etc
Working Conditions
The ambient temperature : ≤ +40℃.
The average temperature within 24 hours ：≤ 35℃
The lower limit of ambient temperature : ≥ -5℃
When the highest temperature reaches +40℃, the relative air humidity shouldn’t be more than 50%. Higher relative humidity is allowed in the relatively lower temperature, such as 90% humidity in 20℃. The measure should be taken to deal the condensation occasionally caused by the temperature change.
The surrounding environment should be clean without the flammable and dangerous substances, gases that can damage insulation and metal, and conductive dust.
Characteristic
Fine processing, selection of premium material, quality assurance.
High strength, no deformation, no , long service life.
Small size, compact structure, stable performance.
With the function of protecting fingers to prevent the risk of electric shock.
Applicable to machine tools, machinery, chemicals, textiles and other fields.
Technical Parameter
| Type Specification | GW28-20 | GW28-25 | GW28-32 | GW28-63 | GW28-125 |
| Rated Insulation VoltageUi V | 660 | 660 | 660 | 660 | 660 |
| Conventional Heating CurrentIth A | 20 | 25 | 32 | 63 | 125 |
| Rated Operating VoltageUe V | 24 110 240 440 | 24 110 240 440 | 240 440 | 240 440 | 240 440 |
| Rated Operating Current Ie | |||||
| AC-21A AAC-22A A | 20 20 | 25 25 | 32 32 | 63 63 | 100 100 |
| AC-23A A | 15 15 | 22 22 | 30 30 | 57 57 | 90 90 |
| AC-2 A | 15 15 | 22 22 | 30 30 | 57 57 | 90 90 |
| AC-3 A | 11 11 | 15 15 | 22 22 | 36 36 | 75 75 |
| AC-4 A | 3.5 3.5 | 6.5 6.5 | 11 11 | 15 15 | 30 30 |
| AC-15 A | 5 4 | 8 5 | 14 6 | ||
| AC-13 A | 12 0.4 0.4 | 20 0.5 0.5 | |||
| Rated Control Power P | |||||
| AC-23 KW | 3.7/2.5 3.7/2.5 | 5.5/3 11/5.5 | 7.5/4 15/7.5 | 15/10 30/18.5 | 30/15 45/22 |
| AC-2 KW | 4 7.5 | 5.5 11 | 7.5 15 | 18.5 30 | 30 45 |
| AC-3 KW | 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 |
| AC-4 KW | 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 |
Note :
① Zero line ground
② AC-23A, AC-3 and AC-4 rated power numerator represents 3 phase 3 poles, while their denominator represents 1 phase 2 poles. Besides, AC-2 is 3 phase 3 poles.
Installation Condition
The switches should be installed in the environment conditions of pollution level 3.
Please install these GW28 series according to the instructions provided by the factory.
Dimensional Drawing
