SS451ET
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The Danaher SS451ET, part of the Slo-Syn Synchronous Motors series, offers single-phase operation utilizing a phase-shifting capacitor network. It delivers 450 oz-in of rated torque and operates at 72 RPM (60 Hz) or 60 RPM (50 Hz). The motor features an IP42 enclosure with insulation class B.
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Product Description:
SS451ET a precision Slo‑Syn synchronous motor from Danaher that is precise and capable of low-speed operation as well as high torque delivery in demanding applications. It is clearly identified by its part number for easy counting on inventory and has a 90 mm frame for slotting into standard NEMA 23, 34 and 42 mounts making integration into a preexisting setup easy. The module delivers 450 oz‑in of torque to secure handling of heavy loads without slippage. At 120 VAC, the motor is drawn at only 0.80 A and 0.30 A at 240 VAC, relatively low on power and cooling.
Operating at 72 RPM on 60 Hz or 60 RPM on 50 Hz, the SS451ET model provides reliable motion control with minimal vibration, making it ideal for precision conveyor systems and packaging machinery. It functions on single‑phase power and requires an external capacitor—14 µF at 120 VAC or 3 µF at 240 VAC—to maintain correct phase shift and consistent starting torque. The unit is built with IP42-rated protection and Class B insulation, allowing it to resist dust, light moisture, and temperatures up to 130 °C. It handles load inertia up to 7.5 lb‑in², supporting smooth acceleration without overshoot or performance lag.
This commercial device is available in leaded, connector, or terminal box versions, making it flexible for a range of wiring setups and easy to install in the field. Weighing only 6.15 lbs, it simplifies handling and mounting. Beyond mechanical drive applications, it can also operate as a synchronous condenser, providing a power factor correction function that improves electrical efficiency and reduces utility charges. With a leading power factor up to 0.8, the SS451ET not only delivers precise performance but also contributes to smarter energy usage across industrial systems.
Frequently Asked Questions about SS451ET:
Q: How do I choose the correct capacitor for SS451ET?
A: Select a 14 µF, 250 VAC phase‑shifting capacitor for 120 VAC operation and a 3 µF, 250 VAC unit for 240 VAC operation. You mount the capacitor close to the motor terminals to maintain proper phase shift and torque.
Q: What mounting considerations apply to SS451ET?
A: This motor variant mount on a flat surface using its 90 mm frame bolt pattern for stability. This ensures that the mounting structure supports its 6.15 lbs weight to prevent vibration.
Q: How does SS451ET handle sudden load changes?
A: SS451ET’s 5.5 lb‑in² to 7.5 lb‑in² rated load inertia supports smooth acceleration under varying loads. The drive experience minimal speed deviation because the synchronous design maintains lock with the field.
Q: What maintenance does SS451ET require for its insulation?
A: First, inspect the SS451ET’s winding insulation annually for signs of thermal aging. Second, replace the motor if insulation resistance falls below the Class B threshold to prevent failures.
Q: Can SS451ET improve my facility’s power factor?
A: You can operate this synchronous module without mechanical load to deliver reactive power as a synchronous condenser. It also reduces overall lagging loads and lower utility demand charges by adjusting excitation.
