Power Contacts: 60 Amp, 480 Volt (Max)Operating Coil Power: (2) voltages available in stock. (other voltages available please call)Dimensions: 5.12 x 3.88 x 2.63 HMounting orientation: Vertical onlyMercury Displacement Relays (MDRs) outperform and outlast mechanical contactors on all types of resistive (heating) loads. MDRs have superior features to standard electromechanical contactors in heating systems. The MDR, unlike a contactor, does not move contact points. It activates a plunger that raises or lowers the level of mercury to make or break an electrical connection. The liquid mercury creates a fresh, new contact surface for each cycle, avoiding the frequent cause of contactor failure. This type of construction allows the relay to operate for millions of cycles. Frequent Relay cycling is necessary to regulate oven temperatures and is usually becomes the cause of shortened relay life.
* Note about Relays:
Relays are operated by a Control Coil. The Control Coil is the part of a relay that makes the relay switch ON and OFF . When the Control Coil is energized by a voltage, it creates a magnetic field to switch the relay'. The the voltage to switch the relay is called the Control Coil Voltage (also called "control voltage") . The Control Coil Voltage may (or may not) be the same as the “Power Line Voltage”. Typical relay control volts are 12 volt, 120 volt or 220 volt. To function properly, the relay's Control Coil Voltage must match the output from the controlling device such as a Temperature controller. If you are replacing a relay the Control Coil Voltage should be marked somewhere on the relay. Some Temperature Controllers with solid state relay outputs may require a "Load Resistor" on the output in order for the relay to function properly.
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