DENT Instruments PowerScout 3 Manual de usuario

USER’S MANUAL

PowerScout 3™

PowerScout 18™

ViewPoint™

October 25, 2010

DENT Instruments | 64 NW Franklin Avenue | Bend, Oregon 97701-2906 USA

Phone 541.388.4774 | Fax 541.385.9333 | www.DENTinstruments.com

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www.PowerMeterStore.ca

PowerScout™

SAFETY SUMMARY and SPECIFICATIONS

This general safety information is to be used by

both the Logger operator and servicing

personnel. DENT Instruments, Inc. assumes no

liability for user’s failure to comply with these

safety guidelines.

Conforms to UL Std 61010-1

Certified to CSA Std C22.2 No. 61010-1

The PowerScout™is an Over-Voltage Category III device.

CAUTION: This METER may contain life threatening voltages. QUALIFIED PERSONNEL MUST Disconnect all

high voltage wiring before USING or servicing the METER.

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 PowerScout™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 electric shock. Life threatening voltages may be present. Qualified

personnel only.

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 PowerScout is a 600 Volt Over Voltage Category III device.

USE ONLY CURRENT TRANSFORMERS (CTs) SUPPLIED.

Do not use other CTs. A serious shock hazard and meter damage can occur if other CTs are used.

Equipment protected throughout by double insulation (IEC 536 Class II)

No accessories are approved for use with the PowerScout™other than those specified in the DENT Instruments

product literature and price sheets.

If the Meter appears damaged or defective, first disconnect all power to the meter. Then please call

541.388.4774, or email tech support (techhelp@dentinstruments.com), for assistance.

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PowerScout™

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. DENT Instruments, Inc

n'assume aucune responsabilité pour l'utilisateur qui

ne respecte pas les directives en matière de sécurité.

Conforme à UL Std 61010-1

Certifié CSA Std C22.2 No. 61010-1

Le PowerScout ™ est un appareil de surtension de catégorie III.

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 PowerScout ™ 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.

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 PowerScout est un appareil à 600 V de surtension de catégorie III.

UTILISEZ SEULEMENT TRANSFORMATEURS DE COURANT (TC) FOURNIS.

Ne pas utiliser d'autres TC. Un sérieux risque de choc et de dommages au compteur peut se produire si d'autres TC sont

utilisés.

L'équipement protégé en double isolation (IEC 536 Classe II)

Pas d'accessoires approuvés pour une utilisation avec le PowerScout ™ 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 (techhelp@dentinstruments.com), pour obtenir de

l'aide.

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SECTION I: INTRODUCTION

Using this Manual

This manual contains information about the PowerScout™ 3, PowerScout™ 18, ViewPoint Software and the RS-

422/485 to Serial Adapter. For ease of use, this manual has been divided into five sections. The list of sections

and their contents follows:

Section I Introduction

Section II The PowerScout™

Section III ViewPoint™Software

Section IV Configuring the RS-422/485 Adapter

Section V Appendix

PowerScout Overview

The PowerScout™watt-transducers are made for the non-revenue submetering market. Each meter is made to

monitor the voltage, current, power and energy of a single three phase system. The PowerScout™meter uses

direct connections to each phase of the voltage, and uses current transformers (or Rogowski coils) to monitor

each phase of the current. Energy, demand, power factor, line frequency, etc. are derived from the voltage

and current inputs.

The communication interface to the unit is through an RS-422/485 serial connection that uses the 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 PowerScout to provide for data

recording and trend logging and any human interface or display.

Up to 41 PowerScout™18 meters (249 PowerScout™3 meters) may be connected to a single RTU for

monitoring and recording power usage at multiple locations within a single site.

The PowerScout™18 (PS18) consists of six independent three phase metering elements labeled “A” through

“F” in the drawing below. Each metering element has provision for three current transformers (CTs), one for

each phase. In this way, the PowerScout™ 18 can measure six independent three-phase loads.

The voltage reference is made on the power supply board as shown below. The single connection point for the

voltages is common to all six of the watt metering elements. Therefore, though six independent three phase

loads can be monitored by a single PowerScout™18 all six loads must have the same voltage source, e.g., be in

the same panel. To monitor multiple voltage sources, for example, 480/277V and 208/120V loads across a

transformer, two PowerScout™18’s will be needed, one for each voltage source.

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SECTION II: THE POWERSCOUT™

PowerScout Technical Specifications

Service Type Three Phase, Four Wire (WYE)

3 Voltage Channels CATIII 80-346 Volts AC Line-to-Neutral, 600V Line-to-Line

Current Channels

PS3 3 channels 0-5,000+ Amps depending on current transformer

PS18 18 channels 0-5,000+ Amps depending on current transformer

Measurement Type True RMS using high-speed digital signal processing (DSP)

Line Frequency 50/60Hz, DC

Waveform Sampling 13 kHz

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 Better Than 1% (<0.5% typical) for V, A, kW, kVAR, kVA, PF

Resolution 1 Amp, 1 Volt, 1 watt, 1 VAR, 1 VA, 0.01 Power Factor Depending on scaling

setting

Indicators 24 bi-color LEDs (red and green): 4 LEDs per each watt metering

element. Each element has 1 LED to indicate communication and 3 LEDs

for correct phasing (Green when voltage and current on the on the same

phase; Red when incorrectly wired. Patent pending.)

Communication

Direct Modbus over RS-485

Modbus Framing RTU (binary)

Communication Rate 9600 baud

Data Bits 8

Parity None

Stop Bit 1

Data Formats Modbus Protocol

Power From L1 Phase to L2 Phase. PS 18: 5 Watts typ. @ 600VAC, 2.5W typ. @

80VAC; non-user replaceable .5 Amp Internal fuse protection

Mechanical

Operating Temperature -7 to + 60 oC (20 to 140 oF)

Humidity 5% to 95% non-condensing

Enclosure Optional NEMA 4 rated, ABS plastic, 94-V0 Flammability Rating

Weight 0.4 kg (11 ounces) Exclusive of CTs

Dimensions Approx. 6” X 10” (15 X 25 cm) Circuit Board Only, PowerScout 18

ViewPoint™ Minimum System Requirements

Operating System Windows® 7 (32 or 64 bit), Vista (32 or 64 bit), XP or 2000

Communications Port One USB Port or Serial Port

Hard Drive 50 MB minimum available

Processor Pentium Class 1 GHz or more recommended

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Connections To The PowerScout

The PowerScout™has a connector for four voltage wire leads for making connections to voltage sources (L1, L2,

L3, Neutral). The PowerScout™18 also has connectors for up to 18 current transducers (CTs) (PowerScout™3

has 3 CTs). The PowerScout™also has a three wire connector for the RS-485 Modbus link.

CAUTION: THE POWERSCOUT™SHOULD ONLY BE WIRED BY QUALIFIED PERSONNEL. HAZARDOUS VOLTAGES EXIST.

ATTENTION: LE POWERSCOUT ™ NE DOIT ÊTRE BRANCHÉ QUE PAR UN PERSONNEL QUALIFIÉ. TENSIONS DANGEREUSES

SONT PRÉSENTES.

DANGER! THE UNENCLOSED POWERSCOUT BOARD REQUIRES EXTRA CAUTION WHEN CONNECTING. LIFE THREATENING

VOLTAGES EXCEEDING 600 VOLTS MAY EXIST ON THE BOARD. THE RISK OF SERIOUS INJURY OR DEATH SHOULD NOT BE

UNDERESTIMATED.

DANGER! LA PLAQUETTE DE CIRCUITS IMPRIMÉS SANS COUVERCLE EXIGE UN REDOUBLEMENT DE PRUDENCE QUAND ON

FAIT LA CONNEXION. LES TENSIONS DÉPASSANT 600 VOLTS PEUVENT EXISTER SUR LA PLAQUETTE ET PEUVENT METTRE

LA VIE EN DANGER. LE RISQUE DE BLESSURES GRAVES OU DE MORT NE DOIT PAS ÊTRE SOUS-ESTIMÉ.

Connecting the PowerScout™3

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PowerScout™18

Layout and Watt-Transducer Naming Convention

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WARNING! REMOVE THE METER FROM ALL SOURCES OF VOLTAGE BEFORE MOUNTING!

Mounting the PowerScout 3

The PowerScout™ 3 must be installed in an approved electrical panel or enclosure using proper installation

practices according to the local electrical codes. For convenience of mounting, two mounting tabs are

provided on the PowerScout™ 3.

Mounting the PowerScout 18

Open the top cover of the case to expose four (.275”/ 7mm) mounting holes, one at each corner. Using the

appropriate screw for the material that the PowerScout™will be mounted to, screw the case to the mounting

surface. The location you mount the case must be able to support at least 3 lbs.

Wiring the Modbus

For the PowerScout™18 only, open the top cover of the case (if so equipped) by turning the two corner screws

counter-clockwise until loose. Set two rotary switches (on the circuit board near to the Modbus/RS-485

connector) to the Modbus address desired. These switches (on both the PowerScout™3 and PowerScout™18)

set the address for metering element “A.” Metering elements “B” through “F” will always have a Modbus

address that is one higher than the element before. For example, if the rotary address switches are set to 01

then metering element “A” register values will be accessed at Modbus address 01, metering element “B”

registers will be accessed at Modbus address 02, “C” at address 03, and so on.

On the PowerScout™3 and PowerScout™18, the rotary switches are 16 position hexadecimal switches. The

default factory setting is hex 01 (Modbus Address Decimal 01). 254 different Modbus addresses are allowed

from 01 (hex 01) to decimal 254 (hex FE). Addresses hex 00 (Decimal 00) and hex FB through hex FF (Decimal

251 through 255) are reserved for factory use. (See Appendix A for a decimal to hex conversion, if your

equipment is decimal based.) Each PowerScout™18 uses 6 Modbus address.

Next connect the Modbus wires to the connector in the meter. Use Diagram below.

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Wiring of the CT’s:

For each of the six 3-phase metering elements A through F, connect the current transformers as shown in the

diagram below.

Note: The CTs are insensitive to orientation and may be placed on the wires to be monitored with the CT faces

in either direction. The CTs are connected on the PowerScout™board in positions labeled L1, L2, L3 and must

be placed on the phase wires of the load to be monitored corresponding to the phase of the voltage leads. i.e.,

The CT labeled L1 must be placed on L1 phase voltage wire, the L2 CT must be on the L2 voltage, and the L3 CT

on the L3 voltage.

Wiring of the Voltage Input:

Last, connect 14 AWG THHN (or equivalent) wires to the PowerScout™CAT III voltage terminals as shown in the

diagram above after a building installed dedicated circuit disconnect breaker while being as close as possible to

it (following the local electrical codes). Mark the breaker as the disconnect for the PowerScout™. Note that

the PowerScout™has an internal non-user replaceable .5 Amp Internal fuse protection.

Warning: DO NOT EXCEED 600Vac PHASE TO PHASE CAT III. When complete, close the enclosure cover, if

equipped.

Attention: NE PAS DÉPASSER UNE PHASE À 600VAC CAT III. Une fois terminé, fermer le covercle, s’il y en a un.

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Powering the PowerScout™3 and 18

The PowerScout™instruments are self-powered from the L1 and L2 lines. When 80 –340VAC or DC are put

across the L1 and L2 wires the three phasing LEDs will begin to flash in sequence. If the LEDs are all green then

the system power factor is greater than 0.55 and the CTs are properly placed on the corresponding voltage

phases.

If two or three of the LEDs are red then there is a phasing connection error. If two LEDs are red and one is

green. Switch the positions of the two CTs that are red. That should make all three LEDs green.

Using PhaseChek™

PhaseChek™ (patent pending) is a unique feature of the PowerScout™and greatly simplifies installation and, at

a glance, verifies correct CT orientation during installation. The PowerScout automatically adjusts for CT

orientation—greatly reducing set-up time and all but eliminating installation errors.

If two or three of the PhaseChek™ LEDs are red, then there is a phasing connection error. If two LEDs are red

and one is green, switch the positions of the two CTs that are red. That should make all three LEDs green.

If all three PhaseChek™ LEDs are red, probably the CTs are connected in the correct order but off by one

position. For example, the L1 CT is on the L2 phase, the L2 CT is on the L3 phase and the L3 CT is on the L1

phase. Rotate the CTs until all of the LEDs are green thus ensuring a correct metering condition.

You can also verify that your PowerScout™is set up correctly by using ViewPoint™. The ViewPoint™program is

designed to let you easily configure the PowerScout™for the current transformers connected to it and to check

readings. More information about ViewPoint™can be found in Section III of this manual.

Note: 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 the load to be monitored is a lightly loaded electric motor, for example.

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