Setra Systems Power Patrol Manual

Operator’s Guide
Power Patrol Power Meter
Includes:
Power Patrol
and
HeadStart 1.0 Software
June 2, 2014

ii
Setra Systems, Inc. | 159 Swanson Rd. | Boxborough, MA 01719 USA
Phone [phone] | Fax [phone] | www.setra.com

iii
Table of Contents
INTRODUCTION .......................................................................................................................... 6
The Power Patrol Power Meter ...............................................................................................................6
Power Patrol Meter Safety Summary and Specifications........................................................................6
Symbols on Equipment ............................................................................................................................7
Power Patrol Résumé de Sécurité et Spécifications................................................................................9
Symboles des Equipements .....................................................................................................................9
Power Patrol Meter Technical Specifications........................................................................................11
FIELD INSTALLATION.................................................................................................................. 13
Mounting a Power Patrol Meter............................................................................................................13
Wiring Connections on a Power Patrol Meter.......................................................................................13
Wiring CTs..............................................................................................................................................14
CT Wire Lead Polarity .......................................................................................................................................14
Connecting a Communication Cable......................................................................................................15
Connecting via a USB Cable Adapter................................................................................................................15
Connecting via a RS-485 Adapter .....................................................................................................................15
Installing the RS-485 Adapter to a Computer ..................................................................................................16
Connecting via an Ethernet Cable ....................................................................................................................17
Powering the Power Patrol Meter .........................................................................................................17
Power Patrol Single-Phase Connections ..........................................................................................................17
COM—Communications LED .................................................................................................................18
Power Patrol (Serial & Ethernet Communication) ...........................................................................................19
Phase Verification ..................................................................................................................................19
Verifying the Power Patrol Meter Setup Using the LEDs .................................................................................19
Phase Verification Error Table..........................................................................................................................20
Power Patrol Meter Diagram.................................................................................................................21
COMMUNICATING WITH A POWER PATROL METER ........................................................................... 22
Setting the Network Address Switches..................................................................................................23
Installing the HeadStart Software and Communicating with the Power Patrol Meter......................... 24
Communication Setup......................................................................................................................................24
About IP Addresses ..........................................................................................................................................27
Connecting the Ports........................................................................................................................................29
Establishing Communication Protocol...................................................................................................29
Using HeadStart Software......................................................................................................................30
HeadStart Screens ............................................................................................................................................30

iv
Communication and Status Messages .............................................................................................................30
HeadStart Command Buttons ..........................................................................................................................30
Communications....................................................................................................................................31
Setting USB Communication Parameters.........................................................................................................31
Setting Serial Communication Parameters ......................................................................................................32
Setting Ethernet Communication Parameters .................................................................................................33
Communication Error.......................................................................................................................................35
Meter Setup...........................................................................................................................................36
Entering Wiring Information for an Element ...................................................................................................37
Comms. Setup........................................................................................................................................38
Real-Time Values ...................................................................................................................................38
Using Real-Time Values to Verify Setup ...........................................................................................................39
Read/Write Registers—Read/Set Objects .............................................................................................40
Resetting BACnet Objects/Modbus Registers ..................................................................................................41
Sync Registers...................................................................................................................................................41
Firmware................................................................................................................................................42
SECTION IV—ALL THINGS MODBUS.............................................................................................. 43
Modbus Data Scaling—Interpreting the Power Patrol Registers .....................................................................43
Selecting a Scalar..............................................................................................................................................44
Examples Using a Data Scalar...........................................................................................................................44
Values Requiring Two Registers .......................................................................................................................45
Configuration Registers ....................................................................................................................................45
Pulse Output/Input Registers...........................................................................................................................46
Absolute/Net Value Measurement Registers ..................................................................................................47
Positive Power/Energy Measurement Registers..............................................................................................51
Negative Power/Energy Measurement Registers ............................................................................................55
Protocol Commands.........................................................................................................................................60

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SECTION V—ALL THINGS BACNET ............................................................................................... 64
Configuration Objects ......................................................................................................................................64
Pulse Output/Input Objects .............................................................................................................................66
Absolute/Net Value Measurement Objects .....................................................................................................66
Positive Power/Energy Measurement Objects ................................................................................................69
Negative Power/Energy Measurement Objects...............................................................................................70
APPENDICES............................................................................................................................ 71
Appendix A—Power Patrol Meter Wiring Diagrams .............................................................................71
Power Patrol Plus Wiring Diagrams..................................................................................................................72
Appendix B—Connecting to a Network.................................................................................................75
Communication Protocol .................................................................................................................................75
Daisy Chain Layout for RS-485 Network...........................................................................................................75
Networking Using the BACnet/Modbus Protocol ............................................................................................75
Appendix C—Digital I/O Functions ........................................................................................................76
Digital Pulse Outputs........................................................................................................................................76
Appendix D—VERIS H8035/H8036 Emulation.......................................................................................78
VERIS Modbus Integer Registers ......................................................................................................................79
VERIS Multipliers ..............................................................................................................................................80
VERIS Modbus Floating Point Registers ...........................................................................................................82
Appendix E—Conversion Table..............................................................................................................85
Decimal to Hexadecimal Conversion Table ......................................................................................................85
Appendix F—Troubleshooting ...............................................................................................................87
Troubleshooting Communication Issues ..........................................................................................................87
FREQUENTLY ASKED QUESTIONS .................................................................................................. 88
GLOSSARY .............................................................................................................................. 90

6
INTRODUCTION
The Power Patrol meter monitors the voltage, current, power, energy, and many other electrical
parameters on single- and three-phase electrical systems. A Power Patrol meter uses direct connections
to each phase of the voltage, and uses current transformers or Rogowski coils to monitor each phase of
the current. Information on energy use, demand, power factor, line frequency, and more are derived
from the voltage and current inputs.
The communications interface to the meter is an USB communication, or RS-485 serial/Ethernet
connection that uses the BACnet Master Slave Token Passing (MS/TP) protocol or Modbus protocol for
sending commands and retrieving data. A separate remote terminal unit (RTU), Data Logger, or Building
Management and Control System is usually connected to the Power Patrol to provide data recording
and trend logging plus a human interface or display.
POWER PATROL
The Power Patrol is light-weight and compact enough to
mount within an electrical panel. It is typically used for
long-term monitoring of electrical systems.
Up to 127 Power Patrol meters may be connected to a
single BACnet client for monitoring and recording power
usage at multiple locations within a single site. Up to 247
meters may be connected to Modbus.
There is a configurable digital pulse output port on the
Power Patrol that can be used to output kWh, kVARh, or kVAh pulses to external devices, or to toggle on
and off to control a remote device or relay.
Power Patrol Meter Safety Summary and Specifications
This general safety information is to
be used by both the Power Meter
operator and servicing personnel.
Setra Systems, Inc. assumes no
liability for user’s failure to comply
with these safety guidelines.
PS3037-X-X
These items conform to the
following:
Conforms to UL Std 61010-1, 3rd
Edition & IEC 61010-2-030, 1st
Edition
Certified to CSA Std C22.2 No.
61010-1, 3rd Edition
The Power Patrol is an over-voltage Category III device. Use approved rubber gloves with mechanical protection and
goggles when operating the device.
CAUTION: THIS METER MAY CONTAIN LIFE THREATENING VOLTAGES. QUALIFIED PERSONNEL MUST DISCONNECT
ALL HIGH VOLTAGE WIRING BEFORE USING OR SERVICING THE METER.

7
WARNING
Use of this device in a manner for which it is not intended may impair its means of protection.
Symbols on Equipment
Denotes caution. See manual for a description of the meanings.
When connecting the Power Patrol to an AC load, follow these steps in sequence to prevent a shock hazard.
1. De-energize the circuit to be monitored.
2. Connect the CTs to the phases being monitored.
3. Connect the voltage leads to the different phases. Use proper safety equipment (gloves and protective
clothing) as required for the voltages monitored.
DENOTES HIGH VOLTAGE. RISK OF ELECTRICAL SHOCK. LIFE THREATENING VOLTAGES MAY BE PRESENT.
QUALIFIED PERSONNEL ONLY.
Hazardous voltage exist, there are no user serviceable parts inside. Do not open the enclosure.
DO NOT EXCEED 600V. This meter is equipped to monitor loads up to 600V. Exceeding this voltage will cause
damage to the meter and danger to the user. Always use a Potential Transformer (PT) for loads in excess of
600V. The Power Patrol is a 600 Volt Over Voltage Category III device.
Pulse output: 30V max open voltage, 5mA max current.
See the appendix for pulse output usage.
SENSOR LIMITATIONS
USE ONLY SHUNTED CURRENT TRANSFORMERS (CTs).
Do not use other CTs. Only use shunted CTs with a 333mV maximum output only. Serious shock hazard and
logger damage can occur if unshunted CTs are used. The UL listing covers the use of the following Setra
Systems CTs that are UL Recognized and have been evaluated to IEC 61010-1:
CT‐SCP‐020 (20A), CT‐SCP‐050 (50A), CT‐SCP‐0100 (100A), CT‐SCP‐0200 (200A), CT-PF-12 (Power Flex
Rogowski Coil), CT-PF-24 (Power Flex Rogowski Coil) and the CT-PF-36 (Power Flex Rogowski Coil).
FCC COMPLIANCE
SPP-E-N, SPP-E-D, SPP-S-N, SSP-S-D
This device has been tested and found to comply with the limits for a Class A digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at user’s own expense.
Operation is subject to the following two conditions: (1) This device may not cause harmful interference,
and (2) this device must accept any interference received, including interference that may cause
undesired operation.

8
Equipment protected throughout by double insulation (IEC 536 Class II).
MAINTENANCE
There is no required maintenance with the Power Patrol. Abide by the following items:
Cleaning: No cleaning agents, including water, should be used on the Power Patrol.
Battery Life: (If equipped) The lithium battery is only used to maintain the date and clock settings during power
failure and has a life expectancy of greater than 10 years. Contact Setra Systems for service.
No accessories are approved for use with the Power Patrol other than those specified in the Setra Systems product
literature and price sheets.
If the power Meter appears damaged or defective, first disconnect all power and sensors. Call or email technical
support for assistance.
Setra Systems, Inc.
159 Swanson Road
Boxborough, MA 01719
Phone: [phone]
www.setra.com

9
Power Patrol Résumé de Sécurité et Spécifications
Cette information de sécurité est
destinée à être utilisée à la fois
par l'opérateur de l'enregistreur
et le personnel de service. Setra
Systems, Inc n'assume aucune
responsabilité pour l'utilisateur
qui ne respecte pas les directives
en matière de sécurité.
PS3037-X-X
Tous les articles sont conformes à
ce qui suit:
Conforme à UL Std 61010-1, 3rd
Edition & IEC 61010-2-030, 1st Edition
Certifié CSA Std C22.2 No. 61010-1,
3rd Edition
Le Power Patrol est un appareil de surtension de catégorie III. Utiliser des gants en caoutchouc approuvé avec protection
mécanique et des lunettes lors de l'utilisation de l'appareil.
ATTENTION: CE METER PEUT CONTENIR DE HAUTES TENSIONS QUI PEUVENT ÊTRE DANGEREUSES. UN PERSONNEL
QUALIFIÉ DOIT DÉBRANCHER TOUS LES CÂBLES À HAUTE TENSION AVANT D’UTILISER OU DE RÉPARER
DU METER.
ATTENTION
L'utilisation de cet appareil d'une manière pour laquelle il n'est pas destiné peut annuler ses moyens de
protection.
Symboles des Equipements
Signifie prudence. Voir le manuel pour une description de la signification.
En faisant la connexion du Power Patrol à une prise de courant alternatif, suivez ces étapes en ordre pour
empêcher un risque de choc.
1. Décharger le circuit à contrôler.
2. Connectez le TC aux phases à surveiller.
3. Connectez les fils de tension à des phases différentes. Utiliser des équipements de sécurité (gants et des
vêtements de protection) qui sont nécessaires pour les tensions surveillées.
INDIQUE HAUTE TENSION. RISQUE DE CHOC ÉLECTRIQUE. HAUTES TENSIONS PEUVENT ÊTRE PRÉSENTES
QUI METTENT LA VIE EN DANGER. PERSONNEL QUALIFIÉ UNIQUEMENT.
Tension dangereuse existent, il n'y a aucune pièce réparable par l'utilisateur n'ouvrez pas le boîtier.
NE PAS DEPASSER 600V. Ce compteur peut contrôler les charges jusqu'à 600V. Le dépassement de cette
tension peut causer des dommages à l'appareil et du danger pour l'utilisateur. Utiliser toujours le potentiel
transformateur (PT) pour des charges de plus de 600V. Le Power Patrol est un appareil à 600 V de surtension
de catégorie III.

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Sortie d'impulsion: 30V max tension ouverte, 5 mA courant maxi. Voir l'appendice pour sortie d'impulsions
l'utilisation.
LIMITATIONS DE DÉTECTEUR
UTILISEZ SEULEMENT TRANSFORMATEURS DE COURANT (TC) SHUNTÉE.
N’utilisez pas d'autres TC. Utilisez seulement des TC shuntée avec une puissance maximale 333mV. Un sérieux
risque de décharge électrique et des dommages à l'enregistreur peut se produire si des TC pas shuntée sont
utilisés. Utiliser seulement les CTs des Setra Systems suivants qui sont énumérés jusqu'au 600V/CATIII.
CT‐SCP‐020 (20A), CT‐SCP‐050 (50A), CT‐SCP‐0100 (100A), CT‐SCP‐0200 (200A), CT-PF-12 (Power Flex
Rogowski Coil), CT-PF-24 (Power Flex Rogowski Coil) and the CT-PF-36 (Power Flex Rogowski Coil).
L'équipement protégé en double isolation (IEC 536 Classe II)
Entretien
Il n'y a aucun entretien requis avec le Power Patrol. Respectez les points suivants:
Nettoyage: Aucun agents de nettoyage, y compris l'eau, doit être utilisé sur le Power Patrol.
Espérance de Vie de la Batterie: La pile au lithium est utilisée uniquement pour maintenir les paramètres de date
et d'heure en cas de coupure de le courant et a une espérance de vie de plus de 10 ans. Contactez DENT
Instruments pour le service.
Pas d'accessoires approuvés pour une utilisation avec le Power Patrol sauf ceux spécifiés par DENT Instruments
dans ses documentations sur les produits et également sur les prix.
Si le compteur semble endommagé ou défectueux, tout d'abord déconnecter le pouvoir de l'appareil. Alors s'il
vous plaît appelez 541.388.4774 ou contacter par courriel l'assistance technique pour obtenir de l'aide.
Setra Systems, Inc.
159 Swanson Road
Boxborough, MA 01719
Phone: [phone]
www.setra.com
Email:

11
Power Patrol Meter Technical Specifications
Specification
Description
Service Types
Single Phase, Three Phase-Four Wire (WYE), Three Phase-Three Wire (Delta)
3 Voltage Channels
80-346 Volts AC Line-to-Neutral, 600V Line-to-Line, CAT III
Current Channels
3 channels, 0.525 VAC max, 333 mV CTs, 111 mV Rogowski coils, 0-4,700+ Amps
depending on current transducer
Maximum Current Input
158% of current transducer rating (mv CTs) to maintain accuracy. Measure up to 4000
Amps Power Flex Rogowski Coil
Measurement Type
True RMS using high-speed digital signal processing (DSP)
Line Frequency
50/60Hz
Power
From L1 Phase to L2 Phase. 80-600VAC CAT III 50/60Hz SPP: 90mA Max, Non-user
replaceable .5 Amp internal fuse protection
Power Out
Unregulated 5VDC output, 140 mA max
Waveform Sampling
12 kHz
Parameter Update Rate
.5 seconds
Measurements
Volts, Amps, kW, kWh, kVAR, kVARh, kVA, kVAh, Apparent Power Factor (aPF),
Displacement Power Factor (dPF). All parameters for each phase and for system total.
Accuracy
Meter: 0.2% (<0.1% typical) ANSI, C12.20-2010 Class 0.2
Resolution
0.01 Amp, 0.1 Volt, 0.01 watt, 0.01 VAR, 0.01 VA, 0.01 Power Factor depending on
scalar setting
Indicators
Bi-color LEDs (red and green): 1 LED to indicate communication, 3 LEDs for correct
phasing (Green when voltage and current on the same phase; Red when incorrectly
wired.) Pulse output LED, Power On LED
Pulse Output
Open Collector, Optically Isolated , 5mA max current, 30V max open voltage
Communication
Direct
User Selectable Modbus RTU or TCP; BACnet Master Slave Token Passing protocol
(MS/TP) RS-485 or IP (Ethernet)
Serial Meters
Max Communication
Length
1200 meters with Data Range of 100K bits/second or less
Communication Rate
(baud)
Modbus: 9600 (Default), 19200, 38400, 57600, 76800, 115200
BACnet: 9600, 19200, 38400, 76,800 (Default)
Data Bits
8
Parity
None, Even, Odd
Stop Bit
2, 1
Data Formats
BACnet IP, BACnet MS/TP, Modbus TCP, Modbus RTU
Mechanical
Operating Temperature
-7 to + 60⁰C (-20 to 140⁰F)
Humidity
5% to 95% non-condensing
Enclosure
ABS plastic, 94-V0 flammability rating

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Specification
Description
Weight
366.5 g (12.92 oz, 0.808 lbs)
Dimensions
24.2 x 8.5 x 4.0 cm (9.5” x 3.3”x 1.6”)
Ingress Protection (IP) Rating
20
HeadStart Minimum System Requirements
Operating System
Windows® 7 (32 or 64 bit), Windows® 8 Pro, Vista (32 or 64 bit), XP
Communications Port
One USB port or serial port
Hard Drive
50 MB minimum available
Processor
Pentium Class 1 GHz or more recommended
Safety
Serial/Ethernet Meters
The following are UL listed:
SPP-E-N, SPP-E-D, SPP-S-N, SPP-S-D
Power Patrol Meter
Conforms to UL Std 61010-1, 3rd Edition & IEC 61010-2-030, 1st Edition
Certified to CSA Std C22.2 No. 61010-1, 3rd Edition
Table I-1: Technical Specifications

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FIELD INSTALLATION
Mounting a Power Patrol Meter
The Power Patrol meter must be installed in an approved electrical panel or enclosure using proper
installation practices according to the local electrical codes.
To mount the Power Patrol, use the two tabs provided at both ends of the case. Securely mount
the Power Patrol near a dedicated circuit disconnect breaker.
Figure I-1: Power Patrol mounting tabas
Wiring Connections on a Power Patrol Meter
High voltage MAY BE PRESENT. Risk of electric shock. Life threatening voltages may be present.
Qualified personnel only.
Haute tension peut être présente. Risque de choc électrique. Tensions dangereuses peuvent
être présentes. Personnel qualifié uniquement.
The Power Patrol meter has the following connections:
Either a three-wire connector for the RS-485 BACnet/Modbus link and/or an Ethernet
connector.
Four voltage connections. Voltage leads are customer supplied. The Power Patrol meter is self-
powered from L1 and L2.
WARNING! Remove the meter from all sources of voltage before mounting.
Mounting tab,
located on each
end of meter case

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
3 CT inputs
Digital output ports. The ports can be used to output kWh, kVARh, or kVAh pulses to external
devices, or to toggle on and off to control a remote device or relay.
USB port for powering the meter during setup
Wiring CTs
1) Insert the CT wires into the connector/s. See the following CT wire lead polarity table for the correct
wiring configuration.
CT WIRE LEAD POLARITY
CT Type
CT Lead +
CT Lead -
Shield
Power Flex (Rogowski coil)*
Red
Black
Shield Wire
Split Core CT mV (SCP, SCM series)
White
Black
Table II-1: CT Polarity
2) Attach the CT connectors onto the Power Patrol connections labeled CT 1, CT 2 and CT 3.
3) Place the CTs on the phase wires of the load to be monitored and corresponding to the phase of the
voltage leads. The CT labeled CT 1 must be placed on L1 phase voltage wire, CT 2 must be on the L2
voltage and CT 3 on the L3 voltage. Refer to Phase Verificatio later in this section for information
about the CT LEDs and verifying the CT installation.
NOTE: The directionality for Rogowski Coils is the arrow on the label pointing toward the
* Power Flex Rogowski Coils have a shield wire which must be connected to the meter. This reduces
interference and improves accuracy of the CT.
CT Inputs
Ethernet
Port
RS-485
Port
Digital
Output Port
Voltage Connections
USB Port

15
Connecting Communication Cable
High voltage MAY BE PRESENT. Risk of electric shock. Life threatening voltages may be present.
Qualified personnel only.
Haute tension peut être présente. Risque de choc électrique. Tensions dangereuses peuvent
être présentes. Personnel qualifié uniquement.
Communication between a Power Patrol meter and a logger or computer is established with an USB
cable, a serial RS-485 adapter or an Ethernet connection. A serial connection (RS-485) is limited in speed
while a parallel connection (Ethernet) or USB connection is much faster.
NOTE: Configuration of Power Patrol meter can be completed prior to field installation by powering
device via computer and USB cable using HeadStart software.
CONNECTING VIA A USB CABLE
Connect one end of USB cable into the Power Patrol and the other end into your computer. To begin
communicating via an USB cable you must first set it up with HeadStart Software. See USB Connection in
the Communicating with a Power Patrol Meter section.
CONNECTING VIA A RS-485 ADAPTER
To complete the connection between the Power Patrol meter and the computer, the three wires coming
from the RS-485 adapter are plugged into the Power Patrol.
Insert each white ferrule into the appropriate RS-485 connection on the Power Patrol. The red wire
inserts in (+), the black wire in (-) and the green wire in GND, Figure II-1.
Verify that the dip switches on the back of the RS-485 adapter are set to: RS-485, Echo Off, 2 Wire, 2
Wire as shown in Figure II-2.
The adapter is ready to be connected to the Power Patrol meter.
Figure II-2: Dip switches on back
of RS-485 Adapter
Figure II-1: RS-485 Adapter

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INSTALLING THE RS-485 ADAPTER TO A COMPUTER
Installation of an RS-485 adapter and HeadStart software can be completed and tested with a meter
prior to the field installation.
1) Insert one end of a USB cable into the RS-485 adapter and the other end into a USB port on the
computer.
2) Insert the CD that came with the RS-485 adapter into your computer.
3) The Found New Hardware Wizard window appears.
The window states “This wizard helps you install software for: Model USOPTL4,” and asks “What do
you want the wizard to do?”
4) Select Install the software automatically and click Next.
5) Click Finish when the installation is complete.
6) Remove the CD from your computer.

17
CONNECTING VIA AN ETHERNET CABLE
Connect one end of the Ethernet cable into the Power Patrol and the other end into your computer. To
begin communicating via an Ethernet cable you must first set it with HeadStart software. See Ethernet
(TCP/IP) Connection in the Communicating with a Power Patrol Meter section.
Powering the Power Patrol Meter
The Power Patrol meter can be powered through USB cable and computer prior to field installation for
configuration purposes.
For field installation, connect the Power Patrol meter 14
AWG THHN Minimum 600VAC rating (or equivalent in
order to maintain 600VAC safety rating of the device)
voltage leads as close as possible to a building-installed,
dedicated circuit disconnect breaker. Mark the breaker
as the “disconnect”for the Power Patrol. Refer to the
wiring diagrams in the Appendix for specifics of the
wiring connections.
Follow local electrical codes during this installation.
Figure II-3: Voltage leads into circuit breaker
The Power Patrol meter is self-powered from the L1 and L2 lines. When 80–600VAC or DC is placed
across the L1 and L2 wires, the three phasing LEDs begin to flash in sequence.
POWER PATROL SINGLE-PHASE CONNECTIONS
The Power Patrol meter can be used to monitor single-phase loads. There are several guidelines to keep
in mind about this type of connection:
1) The Power Patrol is powered from a potential between L1 and L2. This can be phase-to-phase (230V)
or phase-to-neutral (115V). With a single-phase 230V panel, the L1 and L2 voltage leads are
connected between the L1 and L2 voltage sources. With a 115V circuit, the L1 voltage lead is
connected to the L1 “hot lead,” and the L2 voltage lead is connected to neutral.
2) Each CT must be paired with the correct voltage source. The current and voltage need to be in-
phase for accurate measurements. For instance, CT 1 would monitor branch circuit supplied by
voltage source L1, and so on.
3) The neutral must be connected because the Power Patrol uses line-to-neutral measurements for all
calculations.

18
A Typical 230V Single-Phase Panel
Setup (US Wire Colors)
Connect the Black L1 voltage lead to Voltage L1, Red L2 voltage lead to L2 voltage, White Neutral voltage
lead to neutral. CT1 would monitor L1 loads and CT2 would monitor L2 loads. Based on the above
guidelines, CT3 can be used if the Blue L3 voltage lead is connected to either L1 or L2. As long as voltage
lead L3 and CT3 are in-phase, the Power Patrol meter will provide correct kW readings. If the Blue L3
voltage lead was connected to L2 voltage source, then CT3 could monitor any L2 branch circuit. Or, if the
Blue L3 voltage lead was connected to L1 voltage source, then CT3 could monitor any L1 branch circuit.
A Typical 115V Single-Phase Panel
Setup
Connect the Black L1 voltage lead to Voltage L1 (hot), Red L2 voltage lead to Neutral, and White N
voltage lead to neutral. CT1 would monitor the L1 load. CT3 can be used if the Blue L3 voltage lead is
connected to L1. CT3 could then monitor any L1 branch circuit.
System Values
System values are the sum of L1 + L2 + L3 measurements. System values may not be meaningful since
two different devices or loads can be monitored by a single Power Patrol element.
When paired with the right voltage phase, each CT provides individual kW/kWh readings for that CT
channel.
COM—Communications LED
The Power Patrol COM LEDs signal the following communication information.
POWER PATROL (SERIAL COMMUNICATION ONLY)
BACnet
Modbus
Description
Steady Green
Steady Green
Power is applied to the meter.
Flashing Green
Flashing Green
The meter is communicating.
Steady Red
Communications failure, or talking with BACnet while the meter is in
Modbus mode.
Flashing Red
The meter is receiving communication on the bus for a meter at
another address.
Table II-2: Serial COM LED Signals

19
POWER PATROL (SERIAL &ETHERNET COMMUNICATION)
The Ethernet cable has a Link LED on its connector that glows amber when connected to the network
and flashes green during Ethernet traffic.
BACnet/Modbus
Description
Steady Green
Power is applied to the meter.
Flashing Green
The meter is communicating.
Table II-3: Ethernet COM LED Signals
Phase Verification
Phase Verification is a unique feature of the Power Patrol meter that simplifies installation by ensuring
proper CT orientation and avoiding faulty data collection.
VERIFYING THE POWER PATROL METER SETUP USING THE LEDS
The Power Patrol meter uses three bi-color Phase Verification LEDs to check each phase. These LEDs
provide the following information:
All LEDs are green—the system power factor is greater than 0.55 and the CTs are properly
placed on the corresponding voltage phases.
Any one LED is red—there is a phasing connection error.
Two LEDs are red and one is green—two CTs are reversed.
All three LEDs are red—all CTs are incorrectly connected.
DID YOU KNOW?If the total system
power factor is less than 0.55, the
LEDs will be red even if
connected properly. This
situation is rare but could occur
if, for example, the load to be
monitored is a lightly loaded
electric motor where it is
common for the power factor to
be less than 0.55 and the
corresponding LEDs will be red.
Phase Verification LEDs

20
The following table describes the Phase Verification error conditions and the appropriate correction.
PHASE VERIFICATION ERROR TABLE
CT1
CT2
CT3
Error Description
Correction



Setup is correct and the system power factor
is greater than 0.55.
-or-
All CTs are disconnected.
Connect the CTs.



All CTs are incorrectly connected,
-or-
The system power factor is less than 0.55.
Rotate the CT connections by one position by
move CT 1 to CT 2, CT 2 to CT 3 and CT 3 to
CT 1, until all LEDs are green.
The system power factor is less than 0.55 but
the CTs are connected properly indicating a
light load.



CT 2 and CT 3 are reversed.
Switch the position of the CTs flashing red.



CT 1 and CT 2 are reversed.
Switch the position of the CTs flashing red.



CT 1 is swapped with either CT 2 or CT 3.
Switch CT 1 with CT 2.
-or-
Switch CT 1 with CT 3.



CT 2 is swapped with either CT 1 or CT 3.
Switch CT 2 with CT 1.
-or-
Switch CT 2 with CT 3.



CT 3 is swapped with either CT 1 or CT 2.
Switch CT 3 with CT 1.
-or-
Switch CT 3 with CT 2.



CT 1 and CT 3 are reversed.
Switch the position of the CTs flashing red.
Table II-4: Phase Verification LED Error Resolution