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Single/Two Phase Power Controller - Type EFM |
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The EFM is a series of power controllers for controlling small heating cables and electrical radiators.
The EFM is engineered to replace solid-state relays in a large range of application, providing a more accurate and noiseless control.
The EFM has been successfully installed in many residential and commercial buildings. It is primarily used within the HVAC industry for the control of electrical batteries in air handling units ensuring the precise control of the heating. It is however also applied for ceilings, floors and radiant heating etc.
The EFM series has been developed to give our costumers an advantageous combination of high quality, accurate control at any heat requirement and low life cycle costs.
FUNCTIONS |
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Easy Installation
With the built-in signal converter, the wiring required to install the EFM has been reduced. All that is required is to connect the load and a temperature controller and then leave it on its own. |
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No Electrical Noise
Due to the use of zero transition triggering, there is no electrical noise from the EFM. And as an additional advantage, the mains cables to the EFM can be dimensioned for the current supplied to the heating elements with a low installation factor. |
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No Excesive Temperatures
Due to the modulation on the output, which the triac of the EFM provide, it is now possible to avoid the excessive temperatures, which are an unavoidable fact, when using solid-state relays. |
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Low Life Cycle Cost
With the built-in thermal protection and the galvanic isolation between controls and power, the life expectancy of the EFM power controller is much longer than that of a traditional solid-state relay. |
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Pulse Width Modulated Control
It is possible to control the EFM by ON/OFF signal, i.e. a PWM signal. The voltage should be in the range 24-400VAC. |
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Power-Doubling Relay
To decrease the installation cost, the EFM can be connected to the power-doubling relay ETT-1 for doubling the output of the controller. Simply connect 50% of the load to the relay and this load will be turned on, when there is a need for more than 50% heating. |
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A Complete Solution
With a matching range of temperature controllers and sensors, OJ Electronics can offer a complete solution for your single and two phased installations. |
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TECHNICAL DATA |
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SUPPLY VOLTAGE |
VOLTAGE INPUT |
CURRENT INPUT |
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1x230/400 VAC ± 10%, 50/60Hz |
0/2-10VDC, 100kΩ |
0/4-20 mA
(<3.3VDC voltage loss) |
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THERMAL FUSE |
COS PHI |
HEAT OUTPUT |
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85°C |
0.98 |
EFM-9161 3.7/6.4kW
EFM-9251 5.7/10kW
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AMBIENT TEMPERATURE |
MINIMUM OUTPUT LOAD |
INSULATION
VOLTAGE |
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-10 - +40°C |
500W |
2500 V RMS |
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POWER CONSUMPTION |
HOUSING |
LOAD FORM |
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5VA
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