What Is a Direct Current Relay

A direct current relay (DC) is similar to an AC relay, with the main difference being the operating voltage. The AC voltage causes the armature to physically touch the core while the DC voltage causes the armature to remain in an upright position. The AC and DC voltages differ slightly in their voltage ranges, and they need different operating conditions to function properly.

Direct current relays are used for a variety of applications. They are small and can be installed in many different locations. In comparison, alternating current is only suitable for a small number of installations. For this reason, a reliable relay service is essential. A reliable service provider can ensure that your equipment is protected from trouble sources.

The polarity reversal of a current can be disastrous. Even a small amount of current can run away if it does not have the correct polarity. A D overcurrent relay can be used as a highly sensitive reverse-current relay as well. It will trip if one percent of the load current flows in the reverse direction.

A DC coil relay's DC resistance is 24 ohms. According to Ohm's Law, 12 volts divided by 24 ohms equals 0.5 ampere. If the voltage reached 24VAC, the coil would overheat and burn out, which would result in damage to the wire insulation.

In contrast, an AC or DC current relay can protect your equipment against overcurrent and undercurrent damage. This device is crucial for safety in the workplace. It will protect your equipment from malfunctioning due to overcurrent or undercurrent conditions and prevent injuries.