The infinite control switch gives infinite control for non-inductive loads up to 15 Amps on 120 or 240 V-AC (cannot be used with an external contactor). It can be turned either to left or right to adjust proper heat from 0-100% wattage with infinite control over the first 50% of total wattage. Energized continuously in HI position, at other settings it delivers selected input level under control of a simple bimetal timer. Only 3 mounting holes are necessary to install the INFINITE CONTROL SWITCH in customer supplied box or panel. It is designed for use at ambient temperatures up to 85°C.
FUNCTIONAL DESCRIPTION
The model INF turns clockwise or counterclockwise.. A double-line disconnect is provided when the control is in the "Off" position. The permanent magnet provides snap action of contacts. Clean makes and breaks ensure long life of the fine silver contacts. The switch control is ambient compensated. It is designed for operation where ambient temperature does not exceed 85°C. The control contains a bimetal, which regulates the running cycles. This bimetal has a resistance wire wrapped around it,
which is connected in parallel with the heating unit being controlled and cycles in unison with the heating element. When the switch is turned to "ON" position, the follower moves out and allows the contacts to close. This completes a circuit through a heating unit being controlled, and also to the resistance wire wrapped around the bimetal. At this time the steel armature is under the influence of the magnetic pull of magnet. As the resistance wire heats the bimetal, the bimetal flexes and forces are built up in it. When the force built up is equal to the magnetic pull of the magnet, the contacts open with a snap action and the steel armature will be pulled away from the magnetic field. This opens the contacts, which will cut off the power of the heating unit being controlled and will also disconnect the power to the bimetal-Resistance wire. As the bimetal cools, it will then flex in the opposite direction and the contacts will start moving closer together. At a certain point the magnetic pull will close with a snap action. This then will permit current to flow throughout the unit once again as the circuit is complete. A second bimetal is employed as an ambient temperature compensator to neutralize the effect of the surrounding temperatures on the control bimetal. These controls are designed to operate in locations where the maximum ambient temperature does not exceed approximately 85°C. The infinite control switch can control any resistive load up to 15 amps.
It is possible to obtain a range of inputs to the element and/or load from approximately 5% at low- 100% at high, and infinite settings in between.
TECHNICAL SPECIFICATIONS
LINE INPUT
:
230V OR 120V + 20%,15Amp MAX
RANGE
:
5% at low- 100% at high, adjustable
ISOLATION
:
2.5kv A.C, for 1 minute, leakage current <3.5mA
LERAKAGE CURRENT
:
< 210 mA
OPERATING TEMPERATURE
:
0 to 85°C
LIFE
:
1,00,000 Switching cycles under normal conditions
SAFETY
:
Meets VDE, IEC Standards
EMC
:
CE MARKED
DIMENSIONS
:
LENGTH-40MM WIDTH-40MM HEIGHT-74MM APPROX.
WEIGHT
:
110gm APPROX. WITHOUT DIAL PLATE
FEATURES
Simplicity of design with no cams or levers to adjust, and no motor to burn out
Automatic compensation for line voltage fluctuations up to ± 15%
Bimetal acts at settings less than HI to limit electrical input and depress temperature
Mechanical Bi-Metal Operation
Knob Setting 0 - 100% Output
Double Pole, Single Throw
(DPST) Snap-Action
Positive Break
120 or 240 V(Ac) depending on model
1,800 & 3,600 Watts
Cannot be used with a contactor
INSTALLATION INSTRUCTIONS:
L1 and L2 represent line connections at the incoming source. H1 and H2 equal load connections that are connected to the load."P" is for pilot light attachment Maximum Thread Torque 12 in/lbs for palnut mounting.
APPLICATION
Annealing, Melting Pots, Industrial cooking, Dies, Platens,Comfort heating, Electric furnaces, Molding, Industrial hot plates, Laboratory ovens
WARNING:
Hazard of Fire. These devices function as energy controls only. Because they do not fail-safe, an approved temperature and/ or pressure safety control must be used for safe operation
