Product Description
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| Product Information | Resources |
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| Specifications |
| Product Attribute | Attribute Value |
| Input Voltage Range | 100-130VAC or 200-250VAC |
| Frequency | 50/60Hz |
| Power Consumption | 0.5 VA max. |
| Nominal Current | 2.5 amps |
| Minimum Current | 0.25 amps |
| Current Adjustment | 0 - 5 amps x PF |
| Current Output | 4-20mA for chart recorders |
| Repeat Accuracy | 1 % (fixed conditions) |
| Output | SPDT 10A at 240VAC resistive |
| Expected Relay Life | Mech: 10 million operations Elec: 100,000 operations at rated load |
| Trip Delay | OFF or 0.3 to 180 seconds |
| Restart Delay | OFF or 0.1 to 4 hours |
| Indicators | Red LED: Overload or Underload; tripped Yellow LED: Restart timing |
| Transient Protection | 2500V for 10ms |
| Operating Temp | - 20º to 131º F |
| Humidity Tolerance | 97% w/o condensation |
| Enclosure Material | ABS plastic |
| Agency Approvals | UL Listed to US and Canadian safety standards CSA Certified |
| Series Features |
| MODEL 421 Over/Under Motor Load Monitor |
| Series Description: The Model 421 detects an overload or under-load condition on all types of running motors; conveyor motors, elevator motors, mixer motors, submersible pumps, suction pumps, etc. The monitor detects the actual power used (voltage x current x power factor) and is more sensitive than simple current monitors. The Model 421 can be used with single-phase motors, or using the Model 276C Current Transducer, with three-phase motors. Matching CTs allow the Model 421 to be used with virtually any size of motor. Trip and restart delays are provided; one or both can be turned on or off. |
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