RG3 - transformer load break switch
Application:
Transformer switch indoor disconnectors type RG3 are designed for mining switchgears for voltage up to 7,2 kV. The switches are designed to switch on and off the idling currents of transformers built in transformer station used in mining. When open, between the contacts there is visible and safe isolating clearance.
Advantages:
- simple operation
- small size
- the ability to extend the device and mount the plane or rotary motion drive
- the opportunity to work with manual drive NR1-01 and motor drive NS-EL 30-03
- the drive can be mounted on either side of the device
- the replacement for RK-3, OKR i EDJAN-562 types of switch disconnectors
Technical data:
| rated operating voltage | 7,2 kV |
| rated frequency | 50 Hz |
| rated continuous current | 630 A |
| rated making current of idling running of the transformer | 5 A |
| peak withstand current | 40 kA |
| short circuit withstand current 1 s. | 16 kA |
|
test voltage (50Hz) for insulation: to earth and interpolar between the contacts |
20 kV 23 kV |
|
impulse test voltage for insulation: to earth and interpolar between the contacts |
60 kV 70 kV |
| weight | 24 kg |
| mechanical durability | 2000 cycles |
Construction and operation:
The switch disconnector consists of 2 constant connectors (upper and lower), movable connectors and the blade for arc suppression. The wires are fed to the permanent contacts and fastened by M12 bolts. When the transformer switch is opening, movable contacts are falling and the blade is suppressing the arc.
TECHNICAL DRAWINGS:
All technical data presented in the catalog can be changed due to technological progress.