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Product overview

Panel Upgrade, same as KW1850-P1-D-W installed in NEMA 4X Enclosure w/ labeled and prewired supply voltage connections


  • Multi Point Sub-Metering Electrical Panel for Tenant Billing
  • Equipment Load Monitoring
  • Power Quality Monitoring
  • Data Centers
  • Industrial Applications
  • Predicted Maintenance
  • Renewable Energy
  • Overhead Cost Reduction
  • “NET ZERO”
  • LEED
  • Green Buildings and Refrigeration

Product specifications

Service Type:
Single Phase, 3 Phase – Four Wire (WYE), Three Phase – Three Wire (Delta)
100 - 415Vac, 50/60Hz, 100 - 300Vdc on terminals L and N
Rated Voltage:
100-400VAC Line to Neutral (L-N) or 100-690VAC Line to Line (L-L) RMS for three phase or 100-400VAC RMS for single phase
Input Impedance:
PT Burden:
Number of CT Inputs:
Acceptable CT Inputs:
333mV or Rogowski Coil (cannot mix CT’s)
ANSI C 12.20 class 0.5; IEC62053-22 Class 0.5s
AC Fuse Protection:
1A/250VAC External Fuse (not provided)
Measurement Type:
Real-time, True RMS measurement of instantaneous Voltage, Current, Power, Frequency, Harmonics, Phase Angle, Demand, Unbalance Factor, Running Time, and Power Factor
Line Frequency:
Digital Inputs / Type:
18 Digital Inputs for Water and Gas Metering Pulse Counting / Dry Node
Pulse Frequency (MAX):
100Hz, 50% Duty Cycle
SOE Resolution:
Auxiliary Power Output:
15VDC, 1W
Relay Output:
Load Voltage:
250VAC, 30VDC
Max Load Current:
3A (Resistant Load)
Isolation Voltage:
4000VAC (1 min)
Action Time (MAX):
10 milliseconds
Mechanical Life:
>5,000,000 cycles, typical
Conduction Impedance (MAX):
Measurement Data Parameters:
Energy, time of Use, Power Demand, Current Demand, Real Time Metering, Power Quality, Time, Alarming, Data Logging – See Table 1 complete list of Functions and Parameters
Multi-Tariff Time of Use (TOU):
4 tariffs (sharp, peak, normal, valley), 14 schedules, 14 segments, weekends and 10-year holiday settings
Over/Limit Alarms:
Ten limit alarms configured for peak demand, current, or power quality
LCD Display:
LCD Graphic Display with Backlight High-resolution Display
Pulse Output:
Two-wire pulse train, Isolation Voltage 2500VAC, 0-30 VDC Load Voltage, 10mA Max Load Current, Pulse Width 20~100ms (80ms Default), Pulse Constant 1~60,000 (50000 Default) IMP/kWh
Memory Capacity:
8GB or 8MB (based on model selection) onboard memory for data-logging and historical trend analysis
Supported Protocols:
KW1850-P1-D-S: Modbus-RTU via RS485 KW1850-P1-D-W: Modbus TCP, BACnet IP, SNMP, SNTP, WiFi, WPA, WPA2, HTTP/HTTPS, FTP, SMTP, NTP, SNMP MQTT, RSTP, IPV6
Maximum Distance:
1200 meters (3,937 Feet) with data range of 100K bits/second or less
Supported Baud Rates:
1200 to 115200 Baud Rate (19200 Modbus Default)
Data Bits / Parity / Stop Bit:
8 / None (default), Even, Odd / 2, 1 (default)
Modbus Address Range:
1 to 247 (The default is 1)
Operating Temperature Range:
-13 to 158°F (-25 to 70°C)
Storage Temperature Range:
-40 to 185°F (-40 to 85°C)
Operating/Storage Humidity Range:
5 to 95%, non-condensing
Enclosure Material | Flammability Rating:
Polycarbonate / 94-V0
Wire Size:
16-22 AWG (1.5 to 0.6 mm2)
IEC 35mm DIN Standard
Accuview Utility Software, Windows Based. USB-RS485 converter is required to connect to computer for KW1850-P1-D-S only
Password Protected to access Settings. Sealed and Tamper Proof Cover.
Agency Approvals:
BTL Certified, CE, RoHS2, cULus Listed (File # E359521)
Product Dimensions:
6.38" (162 mm) x 3.74" (95 mm) x 2.64" (67 mm)
Optional Meter Enclosure (KW1850-ENC):
Ingress Protection:
Base / Cover Material:
Fiberglass Reinforced Polycarbonate / Polycarbonate (opaque)
Steel Mounting Plate
Quick-release laches that can be secured via screw lock or with a padlock
Flammability Rating:
UL 746C 5-inch flame test
UL 508A, EN 62208
Impact Strength:
IK 08
Enclosure Dimensions (L x W x H):
11.8" (300 mm) x 11.8" (300 mm) x 7.4" (187 mm)

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