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K Series

Craig & Derricott's NEW 'K Series' selector switches are available in four different ranges, each of which has distinct design differences and ranges of accessories. This presents the user with a vast choice of options and the aim of this website is to help the user decide the best option for their precise application.

 

Switch Ranges


Selector Switch catalogue numbers are often difficult to understand and with this new selection we have made every effort to simplify the process. The diagram below shows the basic approach to to our catalogue number 'Build-up'.

 

 


Off-On Switches

Simple Off/On switches can become quite complex when additional contacts are required for performing auxiliary functions. So it you should ever require say a 9 pole rotary switch with 3 N/O and 4 N/C contacts, one of each being gold plated, then the rotary switch is the only logical solution. In this section we show the basic building blocks only; so if you need a standard format it's here, but ...

Changeover Switches

Changeover switching can be as simple as providing an alternative feed to a device, but there are times when an 'Off' position may be required to enable maintenance to take place safely. Add to this various actuators, some of which may be lockable and the end item can be quite specific. In this section we show the basic building blocks only; so if you need a standard format it's here, but please ...

Multi-Step Switches

The title 'Multi-Step Switches' covers a wide range of switch sequences, and in this section you will find switches from 3 to 12 positions. Although there are a number of variations shown, there are always going to be the situations where your precise requirement is 'a little different' to that shown. This is not a problem, we have been designing special sequence switches for more than 50 years, ...

Multi-Step with Off Switches

The title 'Multi-Step with Off Switches' covers a wide range of switch sequences, and in this section you will find switches from 2 to 6 positions plus Off. Although there are a number of variations shown, there are always going to be the situations where your precise requirement is 'a little different' to that shown. This is not a problem, we have been designing special sequence switches for ...

Spring Return Switches

Spring Return Selector Switches provide contacts that are held closed only when the switch is turned against the mechanism springs. The mechanism returning the contacts to their original state upon release of the actuator. The variations possible with this type of contact arrangement are many and only a representative sample of schemes are shown here, so return the switch template below or ...

Cumulative Switches

Cumulative switches provide a simple and effective way of adding functions or loads sequentially. They can be used in control circuits to ensure successive functions are added in a specific order, or more generally for adding successive loads such as heating or lighting. This document shows a selection of standard formats, but if your requirement is somewhat different, then please return the ...

Ammeter-Voltmeter Switches

Panel metering switches fall generally into two groups - Ammeter and Voltmeter switches. Ammeter switches can be directly connected, but more generally are fed from current transformers (C/T's). When C/T fed, the switch must have make-before-break contacts when switching between phases, as an open circuit could generate dangerously high voltages. We show a few standard sequences in this section, ...

Motor Control Switches

Simple Forward & Reverse switches with an isolation position are fairly common items, however there are numerous and complex ways motors can be wound, and matching control and switching arrangements can become very specific. We show a few of the most popular options in this section, however if you can show your requirements graphically then please complete and return the switch design ...

Actuators/Mounting - X

This section details the various actuators and mounting methods available across the ranges and is the 'X' section in our:- Basic switch ref /Actuator(X) / Indicator Plate(Y) / Accessories(Z) analogy   Each item will clearly show which of the four switch ranges are available to match the actuator/mounting method.    

Legend Plates - Y

This section details the various legend plate options across the four ranges  and is the 'Y' section in our:- Basic switch ref /Actuator(X) / Indicator Plate(Y) / Accessories(Z) analogy   All of the options shown below are supplied as a three part assembly which ‘snap’ together, the printed legend being the centre component The back plate or holder forms part of the ...

Accessories - Z

This section details the accessories available across the four ranges and is the 'Z' section in our:- Basic switch ref /Actuator(X) / Indicator Plate(Y) / Accessories(Z) analogy   The following items are available either supplied fitted to the secified selector switch or available seperately (when indicated).