SALIENT FEATURES

• While breaking the circuit, guaranteed sufficient air sectioning
• Utilization category - AC 23A / AC
• Flexibility in mounting - horizontal or
• Strong endurance and resistance to heat [ Tropicalised].
• Flag indicator for two stable positions [1-0-11] & possible switching on or off, on load, thereby fulfilling the roll of switching
• All current carrying parts are of special grade E.T.P. Copper and with silver
• Knife type contact system with self wipe feature allows cleaning of contact during each operation, calling for lesser maintenance and higher li fe.
• Torque required for switch operation is low.
• Easy add on auxiliary contact up to 1 NO & 1 NC for signalisation & inter locking .
• Bolt locking system for easy installation.
• The moulded body's raw material is Glass Fiber reinforced polyester [SMC] which has high mechanical & dielectric
• Protection against over current and short circuit fault of high rupturing capacity upto 80 kA.
• Compact and standardized sizes for range 40A-3150 A - ideal for switch board
• Phase barriers between each phase

 CONSTRUCTION

RR Switchgears manufactures a complete range of on load changeover switches have been designed and developed indigenously to meet various need of distribution circuits. They provide breaking or switching off on load and safety isolation . The switching mechanism is quick make, quick break type independent of the speed of the operation . There are four breaks per pole thereby resulting into faster quenching of arc . The load and line can be connected on either side by virtue of isolation on both the sides . The entire switching mechanism along with the fixed and moving contact assembly are housed in a polyester reinforced, moulded frame/ cover, having high dielectric strength & thermal withstand capacity .

CONTACT MECHANISM

The contact mechanism is knife blade type with self cleaning action during operation. The fixed contact terminals in each phase have separate main and arcing contacts. The moving contact assembly has a four set of contact on moving carrier and the each set of contacts. Loaded with bouncing type strip springs which assist in the true movement during the making and breaking. The moving contact mates with the fixed contact by a slide movement of the moving contact assembly. The contact is first made with the arcing contact and thereafter with the main contact. During breaking, the arc formation is across the arcing contacts thereby protecting the main contacts which results into enhanced life of  the switch. The arc is effectively confined & quenched by the arc barrier in each phase . The switches can be mounted inside a panel either in horizontal or vertical mode without any effect on the performance.