Hoyt KW4000 User's Manual
Contents
1. MAIN FEATURES The Series 4000 is factory programmed offering one model for both 3 or 4 wire services or branch circuits The factory has program the Amperage and 15 min demand period KW4000 only according to the distributors purchase order There are six 6 kWh digits across the top section of the display which are the kilowatt hours accumulated There are no resets available for kWhs like a utility meter and there are no multipliers needed to read the energy consumed There are three additional readings along the bottom of the display These readings are three digits of voltage three digits of amperage and three digits of instantaneous kilowatts These power readings will display HI when the readings go to 4 digits 1 1000 Amps or kW The Series 4000 Demand Meter Model KW4000 will scroll to Maximum Demand demand interval is factory set at 15 minutes unless otherwise instructed Sliding or Rolling Window is the demand method used by this meter The factory programs the relay to1 KWhr per pulse as a standard unless otherwise instructed There is a RS485 ModBus terminal next to the relay This port works with our Intelligent Converter that plugs into the RS232 Com Port in your computer NMI offers software programs Call the factory for more information The voltage and the current terminals are removable If a field calibration check is necessary the terminals simply unplug and a portable meter tester c2. HERTZ A practical unit measuring the number of positive and negative values occurring in one second Sixty Hz is typical in the US and fifty is used in Europe VOLT AMPERE A unit of volts and current that flows because of the voltage Volt ampere and kilowatts are the same at unity power factor In an AC circuit with power factor other than unity the VA equal the square root of watts squared plus reactive volt amperes squared The greater the VA over kW is reflected by poor power factor KVA A common abbreviation for 1000 volt amperes POWER FACTOR The ratio of active power kW to apparent power KVA Power Factor PF can be corrected by capacitors or synchronies motors THD and D TOTAL HARMONIC DISTORTION and Distortion Lets defined linear and non liner loads From a simple and practical point of view a linear load is that when supplied by a sinusoidal voltage absorbs also a sinusoidal current On the contrary a non linear load will absorb a non sinusoidal current for the same supply voltage although such current is habitually of periodical type Representative examples are Static power converters AC to DC power supplies Discharge lamp lighting Arc furnaces electric welding machines Transformers Iron core reactors etc The Distortion can be measured in two different ways giving parameters known as d and THD THD rate is referred to the total R M S value where as d is obtained by multiplying a fundamental voltage
3. Canadian National Standards CUL ANSI C12 16 Accuracy Compliant FCC Class A Part 15 New York City Board of Fire Underwriters Michigan Compliant COMMUNICATION NETWORK ON ONVERTER R WMTH 170 VAC ONINTELLIGENT C CENT CONVERTE ELLIGENT CONVERTER TO Pc 52 TMSTEO SHIELUEL T One or more meter can be connected to a PC so you can read all the parameters at one central location There is a terminal block marked RS485 GR which is the connections for the 3 wire 16 shielded cable You can connect more than one meter to a circuit but you must assign a different identification number to each meter This can be expanded by the use of hexadecimal coding 10 MODBUS PROTOCOL The Series 4000 Energy Meter can communicate by means of the ModBus protocol as described below When the meter communicates with MoBus it uses the RTU mode Remote Terminal Unit Each 8 bits byte in a message contains two 4 bits hexadecimal characters MoBus RTU Protocol Default Configuration 001 9600 8 bits N 1 bit Baud Rates 1 200 2 400 4 800 96 000 The format for each byte in RTU mode is Code 8 bits binary hexadecimal 0 9 A F Two hexadecimal characters contained in each 8 bits field of the message Bits per Byte 8 data bits Error Check Field Cyclical Redundancy Check CRC ModBus Functions Function 01 Function 03 or 04 Reading of the Relay State Reading of n words 16 bits 2 bytes This function p
4. Rules Union Safety Rules or any other applicable safety rules when working with energized circuits must be adhere to A license electrician must perform this installation for all applicable warrantees to be in effect The Series 4000 kit is made up of 4 components 1 meter and 3 CTs Solid core CTs up to 400 Amps are included in the standard kit with larger sizes and split core CTs as an option The line wires feeding this meter shall be protected with in line 5 Amp fuses or a 15 Amp 3 pole circuit breaker Most all of our current transformers have a 5 Amp at F L secondary output Never leave the black and white wires open when the meter is out of service There is appreciable voltage depending on the rating of the CT and the primary load An open CT will hum and vibrate in larger sizes CHECK FOR SHIPPING DAMAGE and SHORTAGES The Watt Watcher Meters are shipped in a protective box with the solid core CTs Split Core CTs may be in another box After unpacking your meter please check for obvious damage or if any components are missing In either case promptly notify the distributor where it was purchased ERRORS AND OMISSIONS We have taken all precautions to create a complete installation manual NMI is not liable for any omissions or errors contained within Please contact us if you have any questions after reading through this manual Thank You NOTE TO THE ELECTRICIAN PLEASE LEAVE THIS MANUAL WITH THE METER WHEN LEAVING THANK YOU
5. accurate readings The meter shall save the energy readings in non volatile RAM during power outages No batteries to be permitted in the meter 2 Meter Function a Calibration of the meter shall be a function of the software The manufacturer shall use 5 resistors on all analog inputs The meter shall be designed for lifetime accuracy using a check sum program embedded in the firmware of the meter b The current transformer circuit on the motherboard shall contain isolating transformers ITF for total isolation between the secondary side of the current transformers and the instrument measuring circuit c The meter shall calculate energy consumption on three phase services 3 or 4 wire using remote CTs to match the amperage of the circuit being monitored d The meter shall contain a relay capable of being programmed for energy counts from 1 1000 watt hours e The meter shall contain an RS 485 RTU ModBus port for remote reading by a PC f The voltage and current terminals shall be removable for field calibration surveys 3 Meter Display a The meter shall have a LCD display kWh readings shall be displayed in six digits Multipliers to read energy usage shall not be accepted b The screen shall also display Volts Amps and Real Time kW phase to neutral or phase to phantom neutral if the meter is on a 3 wire network up to 999 Amps Page 2 Three Phase meter specifications cont 4 Accuracy and Listings The meter sha
6. by a series of currents with frequencies multiple of the fundamental frequency Expected distortion rates commonly found in power systems are 5 and below in voltage and 30 and lower in current Higher readings do not necessarily mean a faulty facility but should be looked at for a potential problem PULSE OUTPUTS Each pulse represents a predetermined increment of power or other quantities Relay 1 in this meter is factory programmed for pulse equals 1 kWh ALARM RELAY Relay 2 may be field programmed to indicate high levels of energy or powers The relay can operate in conjunction with local indicators 1 horn or light SPECIFICATIONS Power Supply Single Phase 230 or 480 VAC in applicable models Voltage Tolerance 20 to 20 Frequency 50 to 60 Hz Power 6 VA Operating Temperature 10 to 50 degrees C Measuring Circuits Rated Voltage 300 V phase to neutral and 500 V phase to phase Rated Current 5 Amp secondary and 110 mv option Permanent Overload 1 25 Current Input Burden 0 75 VA Accuracy Voltage 05 Current 05 Energy 05 Power Factor 0 5 to unity 1 Measured Values between 5 and 100 of rated CT Mechanical Characteristics Enclosure NEMA 1 Flame Rating UL 94 VO Removal Voltage and Current Terminals Relays Maximum Switching Voltage 200 Vdc Maximum Switching Current 400 mA Maximum Operations Cadence 3600 operations per hour Standards USL United States UL Listed UL 508 CNL
7. SERIES 4000 ENERGY METER KWHR ENERGY METER ENERGY USED f RATE HASE POWER WAN SERIES 40 MODEL anes 800 325 6674 PALTAOE 1202084 240 RATER a SPHASE 3 d 5 ML2VA WATT WATCHER INSTALLATION AND OPERATION MANUAL HOYT ELECTRICAL INST WORKS INC PENACOOK NEW HAMPSHIRE PHONE 800 258 3652 www hoytmeter com INDEX Short Cut to Resetting the Demand Readings Inside Front Cover Introduction 1 Main Features 2 The Meter Terminal Description 3 Wiring Diagrams 4 Wiring Instructions 5 Solid Core Current Transformers 5 Split Core Model TP Current Transformers 6 Split Core Model 1250 Current Sensors 7 Common Terms Used Metering 8 Specifications 9 Communications 10 ModBus Protocol 11 Trouble Shooting 12 Warranty Back Cover INTRODUCTION You now have in your possession one of the most reliable and highly accurate meters ever manufactured To insure proper installation and performance please take the time to read this manual before installing this meter The installation information contained within this manual is to be used as a guide and any applicable electrical codes must take precedence over the information contained within WARNING We recommend that all electrical circuits that you are working on be DE ENERGIZED prior to installation of this meter or current transformers If this is not possible than any and all applicable OSHA Safety
8. an plug into them These terminals are a standard feature on all of our meters Also the CTs have two extra terminals that are used when paralleling two sets of CTs Remember Current Sensors with voltage outputs cannot be paralleled Voltage is not additive in parallel where current is There are holes in each corner of the meter for mounting the meter against a plywood board sheet rock wall or switch boards We don t recommend that the meters be mounted against a concrete wall If there are any technical questions that this manual does not cover please call our technical desk at 603 753 6321 THE SERIES 4000 CONNECTION TERMINALS Terminal No 11 12 Relay RS 485 N L2 L3 B amp W CT2 B amp W CT3 B amp W Note Designation Power Supply Pulse ModBus Protocol N Measuring Voltage Measuring Voltage Measuring Voltage Current Transformer Current Transformer Current Transformer Description Power Supply at 230 or 480 VAC Reed Relay RS485 Daisy Chains to other meters Neutral Voltage signal from Phase L1 Voltage signal from Phase L2 Voltage signal from Phase L3 Current or milli volt signal from CT1 Current or milli volt signal from CT2 Current or milli volt signal from CT3 Color code and size all wires according to National Electric Code Current Transformer wires shall be twisted to cancel noise Current Transformers and Line Voltage shall be phase related i e L1 and from the sam
9. e phase the same with L2 and L3 CONNECTION DIAGRAMS FOR THE SERIES 4000 Three Phase 4 wire service which also includes a Hi leg Service LINE LOAD 1 Use either 5 Amp in line fuses or a 15 Amp CB with lock 2 RS485 Terminals GRN optional 3 Relay 1 pulse relay B Three Phase 3 wire either a delta or 3 wires of a 4 wire service LINE Li L2 L3 nt LOAD 1 5 Amp in line fuses or 15 Amp CB with lock 2 RS485 Terminals GRN optional 3 Relay 1 pulse relay WIRING INSTRUCTIONS 1 All wiring to this meter must comply with National Electric Code or any local codes that are applicable A grounding conductor must be installed and connected to the ground lug located under the terminal cover in the meter The voltage wires connected to the line terminals in the meter can be No 14 gage The load for the meter is 03 Amps Either 5 Amp in line fuses or a 15 Amp circuit breaker with a locking handle should protect the voltage leads The extended wires from the meter to the current transformers can be 16 gauge stranded wire up to 100 and 14 to 200 distance The voltage and the current wires can be in the same conduit if you twist the current wires The CT leads must be shunted if the CT is to be installed before the meter arrives or if the meter is taken out of service Never leave the CT leads open on an energized circuit drawing current Exception is the NMI 1250 split core current sensors The secondary
10. ermits to read all the electrical parameters Each parameters is 32 bits long hence two words are required to inquiry for a parameter 4 bytes xx xx xx xx EXAMPLE Inquiry OA Meter peripherals number 10 in decimal 04 Reading function 00 00 Initial address first register 00 0A Number of registers to be read 7176 CRC character Answer 0A 04 14 00 00 08 4D 00 00 23 28 00 00 OF AO 00 00 00 90 00 00 00 60 2E 0A Meter number 10 in decimal 04 Reading function the one used for the inquiry 14 Bytes received 20 00 00 08 4D V X 10 register 00 Hex in decimal 212 5 V 00 00 23 28 mA in decimal 9000 mA 00 00 OF AO W in decimal 4000 W 00 00 00 60 PF X 100 in decimal 96 PF CB 2E CRC character Reading digital outputs relays Function 01 Inquiry Answer PP0100000008CRC PP peripheral No PP0101XXCRC Where XX hexadecimal byte translated to binary b7 b6 b5 b4 b3 b2 bo bit b0 relay 1 1 ON 0 OFF bit bl relay 2 1 ON 0 OFF ENGINEERING SPECIFICATIONS FOR K4000 SERIES THREE PHASE KILOWATT HOUR METER 1 1 GENERAL Submeter for three phase energy billing of kilowatt hours 1 Meter Technology a The meter shall calculate the electrical usage of individual or multiple tenant loads with the use of remote current transformers The meter shall use microprocessor based technology The meter shall be capable of sampling each power waveform calculating power factor and harmonic content to achieve
11. for Volts Amps and instantaneous kW No multipliers are needed to read the energy 2 If Amps and kW are over 999 the display will show HI 3 The RATE LED will blink every time one Kilowatt hour is consumed 7 COMMON TERM USED WITH METER READINGS VOLTAGE The potential between phase and neutral or phase to phase This can be 120 to 480 volts depending upon the model selected AMPERE A unit of electrical current which will flow through a resistance of 1 ohm by 1 volt WATTS A unit of active power which is defined as the rate at which energy is delivered to a circuit This is the power expanded when a current of one Ampere flows through a resistance of one ohm kW A common abbreviation for 1000 watts KW DEMAND A measurement of energy kW or KVA over a choice of a time interval in 15 or 30 minutes which is most common A thumb rule method is to count kWh in 15 minutes and multiply by four Multiply by two if the demand interval is 30 minutes ROLLING OR SLIDING WINDOW A demand interval that moves in time through a sub interval One example would be a 15 minute demand interval could comprise of 15 one minute sub intervals The first 1 minute sub interval will slide into the next measuring period dropping the last sub interval This is the method used in this meter and by many utility companies WATT HOUR A unit of electric energy that measures one watt in one hour There are one thousand watt hours in one kilowatt hour
12. ll comply with ANSI C12 16 Electricity Metering Standards FCC Class A Part 15 Emission UR UL component Listed The CTs shall comply to ANSI C57 13 to 6KV UL CUL Listed TOP DUE P S Communications a The meter shall have an RS 485 communication port The protocol shall be ModBus RS485 RTU Meters to be daisy chained together and connected to a gateway which is connected to the PC for either on site or off site readings b The meter shall contain an energy pulse relay as a standard feature Optional Wireless or PLC transmitters 6 Enclosure a Standard NEMA 1 Surface mount enclosure OPTION e NEMA 1 or 3R Multiple Meter assemblies
13. output of this split core is 110 mv not current In this case the black and white wires are capped separately if meter is not connected Form all wires neatly within the field termination area provided An extra row of CT terminals are provided if paralleling is required Both the voltage and the current terminals are removable if field testing is required in the future Please check carefully all connections before energizing meter Solid Core Current Transformers l Solid Core CTs up to 400 Amps is supplied with this meter The LX 400 Amp CT works in a range of 4 to 400 Amp The solid core CTs are more accurate than the split core and are much smaller Split Cores are available if the power cannot be turned off The H1 or white dot depending on the manufacture faces the line side of the service The black wire connects to the CT terminal B and the white wire connects to CT terminal W Note Shunt the black and white wires if the CT is installed and the meter has not been connected Twist the black and white wires independently from each CT Split Core Current Transformers Model NMI TP Series p1 PRIMARY MARK SCREW TERMIHALS SCREWS FOR ae INSERT TERMINALS LOAD A PRIMARY COHDUCTOR S ASSEMBLY HUTS SPRING LOADED CONTACTS t ASSEMBLY BOLTS Please refer to the above drawing 1 Remove and dispose of the packaging materials 2 To remove the end piece unscrew the assembly nuts push in on
14. the end piece to relieve the pressure on the bolts Pull the bolts out and pull the end from the main U shaped housing 3 Position the P1 side of the CT towards the line side of the service 4 There are 2 screw pressure terminals labeled S1 and S2 Connect the white common 5 Amp wire to the 52 terminal and black wire which is to the S1 terminal 5 The other two brass screws can be used for shunting out the CT with the use of a jumper if needed Remember to remove the jumper after connecting the CT to the meter Do not put the CT around an energized conductor unless the CT is shunted or connected to the meter A open CT will vibrate and hum CAUTION NMI RECOMMENDS THAT YOU TURN OFF ALL POWER BEFORE INSTALLING CTS Split Core Current Sensor Model NMI 1250 400 The secondary side of these split core transformers is 110 milli volts at 400 Amps You need to cap the black and white wires separately if the meter is not installed at the time the current sensor is working Pull hard on the bottom section to open the yoke of the sensor Install around conductor and snap back together Twist the black and white wires independently from each sensor The sensor wires and the voltage wires can be installed in the same conduit You can run up to 2000 with 16 gage wire OPERATION MODE OF THE SERIES 4000 Front Panel of the Series K4000 1 The Display has Six kWh 5 16 Digits across the top and three 3 16 digits
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