An intermediate relay is a versatile electrical device designed to switch:
Multiple circuits simultaneously
High currents and voltages with a low-power control signal
How Does an Intermediate Relay Work?
Think of it as a cousin to the electromagnetic relay:
A control voltage is applied to a coil with a paramagnetic core.
This generates a magnetic field.
The movable armature gets attracted to the core.
Mechanically linked contacts change their state—either closing or opening circuits.
In essence, an intermediate relay functions just like an electromagnetic relay, sharing similar design elements and operational characteristics.
Key Specifications to Consider
When selecting an intermediate relay, keep these factors in mind:
Load Current and Voltage: What the power contacts can handle.
Contact Configuration: Normally open (NO), normally closed (NC), or changeover contacts.
Coil Voltage and Current: The control parameters that trigger the relay.
Most relays have a schematic printed on the housing, making installation straightforward.
Anatomy of an Intermediate Relay
In a typical relay:
Terminals 1-2: For control voltage.
Switching Groups (3-5 and 6-8): Each with NO and NC contacts.
NO contacts stay open without control voltage, while NC contacts remain closed. When activated, their states switch.
Wiring the Relay
Apply control voltage to common terminals (e.g., 3 and 6).
Connect the load on the opposite side.
Depending on the relay type:
High-power loads: Use screw terminals.
Light loads: Flat plug connectors work fine.
Circuit boards: Solder connections may be used.
Final Thoughts
Intermediate relays are essential for managing complex electrical systems efficiently. Whether you're handling high currents or multiple circuits, these devices offer reliable switching capabilities. For top-quality relays and expert advice, visit safsale.com today!