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Alpha 20 Panel Meter, with Relay.
Demand System Control, relay triggers alarms, and alerts via Modbus.
 
Alpha 20 Data Sheet.

Alpha 20 Manual

Alpha 20
Single and 3 phase Multi Meter measuring: Volts Amps, Frequency, RPM, kW. kVAr, KVA, kWh, Current Demand, KVA Demand with RS485 Modbus port and relay limit switch or pulse output.
 
The Alpha 20 will trip the on board relay when the programmed parameter exceeds the trip limits.  Closing an alarm circuit and a status change in Modbus. Relay also serves as a pulse output source.

Field configurable for any Single, 3P 3/4 wire system up to 600V L/L. 1 or 5 amps.

On board meter memory stores Minimum Maximum: Voltage. Current, Run Hrs. On Hrs., Interrupts. UL
Prices.

1ea. AP20 311EA-LR00  $169.00
3 Phase, Aux. 40-300Vac/dc, Input 500V L/L 1/5Amp RS485, Limit Switch. P/O Relay.

1ea. AP20311LA-LR00  $169.00
3 Phase, Aux. 12-48Vdc, Input 500V L/L 1/5 Amp RS485, Limit Switch. P/O Relay.

Parameters
Single Phase Phase Angle Per Phase (1, 2, 3)
Three Phase System Active Power (kW)
User Selectable 3PH 3W/4W Active Power Per Phase (KW1, 2. 3
On site CT Primary Programmable System Re-Active Power (kVAr)
CT Secondary Programmable 1A/5A Re-Active Power Per Phase (KVAr1,2, 3
On Site PT Primary Programmable System Apparent Power (kVA)
On site select-Auto Scroll+Fixed Apparent Power Per Phase (kVA1, 2, 3
Min / Max Storage of Volt/ Current Import kWh (8 digit resolution)
Run Hour, On Hour, Interrupts Export kWh (8 digit resolution)
System Voltage Import kVArh (8 digit resolution)
System Current Export kVArh (8 digit resolution)
Phase Voltage (L1-N, L2-N, L3-N) Apparent Energy kVAh (8 digit resolution)
Line Voltage (L1-L2, L2-L3, L1-L3) System Current Demand
Line Current (IL1 , IL2, IL3) Max Current Demand
Frequency Max KVA Demand
System Power Factor Max KW Demand
Power Factor Per Phase Max KW Import Demand
System Phase Angle. Max KW Export Demand
RPM
Split Core Current Transformers Solid Core Current Transformers
NEMA 4 Poly Enclosure $60.00
Includes casketed  front door with small hasp for securing.
Cutout 93x93mm for 96mm DIN style meters. Mounting hardware included. Drill where suitable, no knockouts. Dimensions: 6x6x4"