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| Part Number | AP20-311EALR000000 | AP20-311DALR0000AN | AP20-311LALR000000 | AP20-311EBLR0000AN |
| Manufacturer | Sifam Tinsley Instrumentation Inc | Sifam Tinsley Instrumentation Inc | Sifam Tinsley Instrumentation Inc | Sifam Tinsley Instrumentation Inc |
| Series | Alpha 20 | Alpha 20A+ | Alpha 20 | Alpha 20A+ |
| Packaging | Box | Retail Package | Retail Package | Retail Package |
| Product Status | Active | Active | Active | Active |
| Type | Multifunction Meter (Current, Voltage, Frequency, Power) | Multifunction Meter (Current, Voltage, Frequency, Power) | Multifunction Meter (Current, Voltage, Frequency, Power) | Multifunction Meter (Current, Voltage, Frequency, Power) |
| Measuring Type | Current (3-Phase), Voltage, Wattage | Current (3-Phase), Voltage, Wattage | Current (3-Phase), Voltage, Wattage | Current (3-Phase), Voltage, Wattage |
| Measuring Range | 1 ~ 5A, 0 ~ 500VAC | 1 ~ 5A, 100 ~ 500V | 1 ~ 5A, 0 ~ 500VAC | 1 ~ 5A, 100 ~ 500V |
| Display Type | LCD - Red Characters | LCD - Red Characters | LCD - Red Characters | LCD - Red Characters |
| Number of Characters Per Row | 4, 4, 4 | 4, 4, 4 | 4, 4, 4 | 4, 4, 4 |
| Display Characters - Height | 0.713" (18.10mm) | 0.713" (18.10mm) | 0.713" (18.10mm) | 0.713" (18.10mm) |
| Output Type | Relay | Relay | Relay | Relay |
| Voltage - Supply | 40 ~ 300VAC/DC | 20 ~ 40VAC, 20 ~ 60VDC | 40 ~ 300VAC/DC | 60 ~ 300VAC/DC |
| Panel Cutout Dimensions | Square - 92.80mm x 92.80mm | Square - 92.80mm x 92.80mm | Square - 92.80mm x 92.80mm | Square - 92.80mm x 92.80mm |
| Mounting Type | Panel Mount | Panel Mount | Panel Mount | Panel Mount |
| Termination Style | Screw Terminal | Screw Terminal | Screw Terminal | Screw Terminal |
| Ingress Protection | IP54 - Dust Protected, Water Resistant | IP54 - Dust Protected, Water Resistant | IP54 - Dust Protected, Water Resistant | IP54 - Dust Protected, Water Resistant |
| Features | Alpha 20 Multifunction Programmable Power/Energy Meter | Alpha 20 Multifunction Programmable Power/Energy Meter | Alpha 20 Multifunction Programmable Power/Energy Meter | Alpha 20 Multifunction Programmable Power/Energy Meter |
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