1616 S Spencer Ave.
Indianapolis IN 46203
Low / Medium / High Control Switch
Manually Controlled Temperature Regulator
Many Evenheat kiln designs use a
switch called a Low-Medium-High Switch, often abbreviated LMH. This switch
allows for 3 heat settings: Low, Medium and High.
|How does the
Low/Medium/High Switch Work?
In order to function, the Low/Medium/High switch is connected to a even number of heating elements or circuits, usually two. It's operation is quite simple. In the low position both of the heating elements are connected in series which gives 25% of total power. In the medium position, only one of the two elements see the total applied voltage which then gives 50% power. In the high position, both elements see the total applied voltage which then gives 100% power. It's a perfect, real world application of the series / parallel relationship.
It should be noted that the
Low/Medium/High switch also contains an Off
Does the LMH Switch Shut the Kiln Off at the End of the Firing?
No. The Low/Medium/High Switch is a manually controlled switch. It stays where you set it.
© 2007 Indiana Ceramic Supply, Inc.
This page last updated on 12/26/2006