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| CAM Operated Rotary Switches |
CAM OPERATED ROTARY SWITCHES are defined as set of contacts arranged to make and break in a sequential fashion by which the connected outputs will close and open the circuits. The main areas of operation are in making and breaking and isolation of power circuits and switching of auxillary circuits. The CAM which does the function of closing and opening of the switch, have multiple positions (Rotary Movement) which allows multiple circuit functions controlled through single operations. These switches are suitable for AC as well as DC applications. By virtue of CAM design functions like make before type of contacts can be easily achieved. The number of positions and the switching angles are flexible and will offer the user a choice to decide based on the requirement. Usage of good quality engineering materials for various components ensure that the switches have a long life with higher degree electrical and mechanical endurance. Double Butt contacts with silver bimetal on copper ensure better making and breaking over conventional knife-edge switches. Usage of high-grade engineering plastics like Nylon and Calcon for the components and glass filled polyamide construction provides greater mechanical strength to the switches. These Cam operated rotary switches have versatile mounting options to suit any kind of application. Special mounting options like single hole, door interlocking and padlocking are also available. |
| Types of Cam Operated Rotary Switches |
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AC SWITCHES (SERIES S, TP & RT) |
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All Switches are suitable for application in AC Circuits. Most of the switches are rated for 690V AC and 6 and 10 Amps alone are rated for 400V AC. AC Switches characterized by the "Quick Make-Slow Break" action by the inbuild features in our latching device and cams construction. These switches can be applied for DC switching with derating and additional contacts in series according to the DC switching voltage. |
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DC SWITCHES (SERIES D) |
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These Switches are designed for DC Switching applications. These switches are constructed using Snap action mechanism which provides Quick Make Quick Break of the contacts which is essential for DC switching. The contacts are of AgCd) Double Break Butt Type, housed in a Glass filled polyamide contact stage and are operated through Cams for higher Electrical endurance and smooth operation. Suitable for 90 & 60 degree switching programmes & applications for both AC and DC Switching. |
| Applications of CAM Switches |
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ISOLATORS |
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These are basically ON-OFF switches, which can be used to isolate the power to a particular area of operation. These isolator switches are available in a wide range from single pole to 12 pole design. Isolators with spring return are also available upto 4 poles. Preclose contacts are used for safety circuits and for neutral and earth line. Isolators generally come under AC1/AC21 duty categories. Some times 3 pole ON-OFF switches are used to switch ON and OFF the motor, with fuse protection, when they must be rated for AC3/AC23A duty categories. |
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CHANGEOVER SWITCHES |
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Changeover switches are otherwise called as Double Throw Switches. They are used to operate two different circy\uits with different numbers of inputs and output. These switches find their application in EB Changeover, auto/manual Changeover, standby/remote Changeover etc. Changeover switches without jumper are used for connecting two different circuits, from two different sources (potential free contacts). It may be due to two different operating voltages or any other incompatible lines. All Double throw switch contacts ny default are of Break Before Make Type (BBM) to avoid overlapping of different circuits. Overlapping changeover contact can be offered against requirement. |
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MULTISTEP SWITCHES |
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These switches can also be called as Pole-Way switches, as they are generally described by Poles and Ways. Multistep switch does the function of connecting different circuits in a common supply or viceversa. Application of these switches are innumerable. Tap changing switch for transformer/stablizer is an example. Multistep switches are basically two way switches. 1 Pole, 2 Pole and 3 Pole is popular for Single ج Two Phase, Three Phase respectively. |
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GANG SWITCHES |
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These switches are called as Gang Switches, as they increase the capacity of circuits by ganging. They are used for serialling and/or paralleling to derive different circuit capacity. The power of battery supply can be increased by serialling. The power of resistor can be increased by paralleling. |
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SELECTOR SWITCHES |
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With the help of these switches we can
- Measure currents in different circuits (with or without current transformer) with a single ammeter and a switch.
- Measure voltages between phases, and phase and neutral, with one voltmeter and a switch.
- Measure voltage and currents of a circuit with one voltmeter, one ammeter and a single switch.
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CONTROL SWITCHES |
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Control Switches are a unique alternative for many of the "PUSH BUTTON" stations, where it is preferred to control a system with one switch instead of many push buttons. Many positions of the switch are possible to derive combinations. These control switches are rated for AC15/DC13 (Duty Categories). AC15 switches need to carry an inrush current of 10 times the normal operating current, while energising solenoids and coils. Hence our switches are suitable derated for AC15, while specifying the normal operating current. Control switches are used to energise contactors for controlling motor operations. Most of the switches are of spring return type to enable latching the circuit with contactor NO contact to facilitate tripping by contactor tripping device.
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MOTOR SWITCHES |
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These switches directly operate the motor with AC3 or AC4 duty (Duty Categories). They are mainly used for motor forward-reversing, star-delta, two speed forward reverse. Special switches are designed to operate with a contactor with built-in tripping feature on power failure and overload are available.
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