64418RW is a heavy-duty industrial electromagnetic relay from Reliance NBR series, designed as auxiliary switching component for Reliance DC drive control cabinets and AutoMax PLC auxiliary control loops. Original production has been terminated. Available market stock includes unused original surplus products and fully tested refurbished relays for maintenance replacement on outdated papermaking, metallurgy and chemical drive equipment. It can be interchanged with other 64418 series variants such as 64418-1X and 64418RS with consistent mounting size.

64418 is the base part number of Reliance NBR standard relay platform. Suffix RW specifies dedicated coil voltage grade and SPDT contact layout. Different suffix codes differentiate coil specification and terminal definition while keeping unified overall mechanical dimension for cabinet installation.

Rated coil operating voltage is 24VDC with nominal power consumption of 1.8W. Contact structure is SPDT single-pole double-throw, rated resistive load capacity 10A at 250VAC and maximum breaking voltage 300VAC. Dielectric withstand voltage between coil and contact assembly reaches 2000VAC, and normal-state insulation resistance exceeds 1000 megaohms. Mechanical service life is over 10 million switching cycles, and electrical service life under full rated load exceeds 100000 operations. Operating ambient temperature ranges from -25℃ to +70℃, storage temperature covers -40℃ to +85℃, and working relative humidity ranges 5%~95% under non-condensing environment. The component complies with UL and CE industrial safety standards.

The relay is constructed with fixed phenolic base and metal fixing brackets, featuring screw-type exposed copper terminals for direct hard wiring without pluggable socket structure. Four pre-drilled mounting holes are available for cabinet screw fixation. No onboard communication interface is configured, and all circuit connection is finished via hard wiring into auxiliary control circuits.

It performs logic switching for auxiliary control power, fault feedback signals and interlock loops inside Reliance drive and control cabinets. It transmits equipment running status and fault trigger signals between field devices and main AutoMax control system to realize interlock protection and signal transfer.

It is widely fitted inside DC drive cabinets of papermaking roller transmission, metallurgical rolling mill and chemical pump driving systems, serving as general-purpose auxiliary switching spare for legacy Reliance automation control equipment maintenance and renovation.

Cut off full cabinet power supply and wait over 20 minutes for residual electric discharge before disassembly or wiring modification. Conduct quarterly maintenance to blow off internal core dust with dry low-pressure compressed air and check terminal tightness and oxidation condition. If abnormal switching or false fault alarm occurs, inspect coil integrity and contact ablation first before replacing the relay. Avoid unexpected overvoltage surge input on coil terminals to prevent internal winding burnout.