Overview – WN3, ATS, 63A, 4P, 110VAC COIL 0306-4993-01
The Cummins WN3, ATS, 63A, 4P, 110VAC COIL 0306-4993-01 is specified for transfer switch and genset changeover panels rated for 63 A four-pole service with a 110 VAC control supply and is supplied to the original dimensional and material standard.
Parts Characteristics
A four-pole automatic transfer switch unit rated 63 A, switched by a 110 VAC operating coil. It moves both line conductors and neutral between two sources, so the load never sees two supplies at once and never loses its safety earth reference during changeover.
Applicable Models & Applications
Used in standby generator installations and changeover panels where a 110 VAC control circuit drives the transfer. Verify your panel’s coil voltage and pole count before ordering – 110 VAC and 220 VAC coils and three-pole and four-pole units are frequently mixed up.
Maintenance & Replacement
Exercise the transfer switch monthly under load if the site allows it. A switch that sits untouched for months welds its contacts, seizes its mechanism and fails on the one night it is actually needed – the classic standby-power post-mortem finding.
Inspect the contact tips and terminal lugs on an annual schedule: look for pitting, discolouration or carbon tracking, re-torque every terminal to specification, and check the coil leads and auxiliary contacts for cracked insulation. Photograph the wiring before any disassembly so reconnection is exact.
Verify the coil supply voltage at the coil terminals during a transfer. A coil fed a sagging or noisy control supply chatters, half-travels and burns out long before its rated life, and the fault is in the control circuit, not the switch.
Replace the complete switch unit rather than attempting to dress burned contacts – a transfer switch is a safety device and its contact pressure and travel are matched at the factory. Confirm the replacement’s pole count, current rating and coil voltage against the panel schedule before the outage window.
Price Reference (USD)
Expect a market price around USD 400-900 for the WN3, ATS, 63A, 4P, 110VAC COIL 0306-4993-01; we confirm the exact figure on your pro-forma invoice.
Value & Service
We stock brand-new four-pole units with the 110 VAC coil and confirm rating and coil voltage against your panel details before dispatch, so the changeover works on the first test.
When you need a dependable WN3, ATS, 63A, 4P, 110VAC COIL 0306-4993-01 for your Cummins Electrical Parts, Racer Machinery keeps the right units in stock and ships worldwide so your machine is back to work without delay.
