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MultiCube

Single Phase

Multi-Function Electricity Meter

Installation and Operation

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Summary of Contents for MultiCube Single Phase

Page 1: ...MultiCube Single Phase Multi Function Electricity Meter Installation and Operation ...

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Page 3: ...le for errors or omissions The apparatus has been designed and tested in accordance with EN 61010 1 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use This operating guide contains information and warnings which must be followed by the user to ensure safe operation and to maintain the apparatus in a safe condition We reserve the right to make changes and improv...

Page 4: ...us Frequency PF THD 14 2 5 ENERGY REGISTER RESET 15 2 6 PEAK VOLTAGE RESET 15 2 7 PEAK CURRENT RESET 15 2 8 PEAK DEMAND RESET 15 2 9 ISOLATED PULSE OUTPUTS 16 3 INSTALLATION 17 3 1 PANEL MOUNTING 17 3 2 CT CONNECTIONS 18 3 3 VOLTAGE CONNECTIONS 18 3 4 AUXILIARY MAINS SUPPLY L N 19 3 5 CONNECTION SCHEMATICS 20 4 PROGRAMMING 21 4 1 DESCRIPTION 21 4 2 ENTERING AND EXITING PROGRAMMING MODE 21 4 3 SETT...

Page 5: ...mmencing installation CAUTION WARNING Refer to Operating Manual Danger Risk of Electric Shock Figure 1 1 Safety Symbols WARNING The meter contains no user serviceable parts Installation and commissioning should be carried out by qualified personnel 1 2 Maintenance The equipment should be maintained in good working order Damage to the product should be repaired by the manufacturer The meter may be ...

Page 6: ... are integrated over long time periods providing a number of energy registers System frequency is detected by digital processing of the voltage input signal 2 1 1 Rolling Demand Amps and kW Demands Average values of Amps and kW are calculated over a user programmable time period 10 2500 seconds for Amps 1 60 minutes for kW The displays show the averages for the most recent time period ending at th...

Page 7: ...Pk Demand Peak MD readings are the maximum recorded values of corresponding Rolling Demand values These may be used to determine the maximum load requirement of a system They are often used to determine spare capacity in a supply system supply plant requirement etc On power failure or brown out Peak Demand values are automatically saved in non volatile memory within the MultiCube The memory requir...

Page 8: ...epeatedly until the desired page is displayed The number of pages available is dependant on meter type To select voltage measurement press the V key until the desired page is displayed Only a single page is available for voltage measurement on all meter types To select power measurements press the P key repeatedly until the desired page is displayed The number of pages available is dependant on me...

Page 9: ...erage display based on 10 sub period values 1s to 250s is updated at the end of each sub period on the bottom line The largest recorded value of this is displayed on the top line as Peak Volts Peak Volts Instantaneous true rms Volts scaled by the user programmable PT primary is updated each second on the bottom line The largest measured instantaneous value peak is shown on the top line PF Hz W Pow...

Page 10: ...ency detected on voltage input signal Instantaneous var calculated as var VA2 W2 denotes Export Watts Demand MD based on rolling average of instantaneous kW Peak kW MD largest since last reset Current Period kW MD Instantaneous kW Import Wh Register Instantaneous watts integrated over time is accumulated in this register while the load is receiving real power The most significant 7th digit is disp...

Page 11: ...umulated in this register while the load is receiving real power The most significant 7th digit is displayed on the middle line Export varh Register Instantaneous var integrated over time is accumulated in this register while the load is generating real power The most significant 7th digit is displayed on the middle line Total varh Register The absolute sum of import and export varh registers A si...

Page 12: ...Amps Peak Amps Volts Peak Volts PF Frequency Watts Import Wh Amps Demand Peak PF Frequency VA PF Frequency var Single Phase MultiCube Type 4 Menus I V P E Amps Peak Amps Volts Peak Volts PF Frequency Watts Import Wh Amps Demand Peak PF Frequency VA Export Wh No Pulse PF Frequency var Watts Demand Peak Single Phase MultiCube Type 5 Menus I V P E Amps Peak Amps Volts Peak Volts PF Frequency Watts Im...

Page 13: ...his provides direct readings with decimal points and legends automatically selected e g kW or MW etc 2 4 1 Voltage Scaling Phase Peak PT Setting Example Display 60V 80V 20 00 V 81V 800V 200 0 V 801V 8 000V 2 000 kV 8 001V 50 000V 20 00 kV 2 4 2 Current Scaling Phase Peak MD Pk MD CT Setting Example Display 5A 8A 5 000 A 9A 80A 50 00 A 81A 800A 500 0 A 801A 8 000A 5 000 kA 8 001A 20 000A 20 00 kA ...

Page 14: ...g kW Demand Peak Demand and kW on the MD page are displayed with 1 less digit of resolution than those above e g 20 00 kW becomes 20 0 kW 2 4 4 Energy Registers Wh VAh varh PT Setting x CT Setting Example Display 300VA 3 000VA 9999 999 kWh 3 001VA 30 000VA 99999 99 kWh 30 001VA 300 000VA 999999 9 kWh 300 001VA 3 000 000VA 9999999 kWh 3 000 001VA 30 000 000VA 99999 99 MWh 30 000 001VA 300 000 000VA...

Page 15: ... occur To reset Peak Voltage Select the Voltage display page as described above Press P and E keys together and Hold for 5 seconds 2 7 Peak Current Reset The peak current reading may be reset to zero using the front panel keys Once reset the old value will be immediately replaced by the latest instantaneous reading and subsequent peaks as they occur To reset Peak Amps Select the Current display pa...

Page 16: ...ing management centres etc Each output takes the form of a normally open volt free contact pair which provides a low resistance for 100mS at the end of a pre set number of increments of the associated energy register pulse rate The pulse rate of each output may be programmed by the user to match the requirements of the external system For further details on programming the MultiCube refer to Secti...

Page 17: ...e allowed behind the panel for the meter Remove the panel mounting clips and insert the meter into the cut out from the front of the panel Push the meter home Ensure the screws in each panel mount clip are fully retracted and insert the clips as shown in the diagram below Tighten the screws to secure the meter firmly in the panel DO NOT OVERTIGHTEN Figure 3 1 Fitting The Meter in a Panel ...

Page 18: ...ary The CT Input to the meter is isolated from all other parts of the circuit WARNING NEVER leave the secondary of a current transformer open circuit while a primary current flows In this condition dangerous voltages may be produced at the secondary terminals 3 3 Voltage Connections Cables used for the voltage measurement circuit should be insulated to a minimum of 600V AC and have a minimum curre...

Page 19: ...en A suitable supply voltage is not available locally Measurement voltages are expected to vary over a wide range A backup supply is required to maintain meter display External fusing is required for safe installation The external fuse should be rated at 250V 100mA Type T WARNING CHECK the instrument LABELS for correct input ratings Incorrectly rated inputs may permanently damage the device NOTE T...

Page 20: ...Installation Page 20 Single Phase MultiCube 3 5 Connection Schematics Figure 3 2 Single Phase Connection ...

Page 21: ...he unit to be set up for a specific application Programming is available using the front panel keypad and display while the unit is operational 4 2 Entering and Exiting Programming Mode To enter programming Press I and V together and hold for 5 seconds When all user programmable settings are complete Press I and V together and hold for 5 seconds to return to measurement mode ...

Page 22: ...rmer connected to the meter inputs The secondary of the CT must match the nominal input current specified on the meter label Once set the constant acts as a multiplying factor in the internal calculation of relevant measurements Figure 4 1 Setting The CT Primary Constant Press U to increase the CT Primary Constant in steps of 1 Amp Press V to decrease the CT Primary Constant in steps of 1 Amp Pres...

Page 23: ...d to the meter inputs The secondary of the PTs must match the nominal line line input voltage specified on the meter label If no potential transformers are fitted the PT setting must match the nominal line line input voltage specified on the meter label Figure 4 2 Setting The PT Primary Constant Press U to increase the PT Primary Constant in steps of 1 Volt Press V to decrease the PT Primary Const...

Page 24: ...to suit a wide variety of data logging building management type applications During programming the Pulse Output 1 Rate is displayed scaled as the Wh register for convenience A display of PL 1 rAtE 10 0 kWh indicates that a single pulse will occur at output 1 at the end of each 10 kWh Figure 4 3 Setting The Pulse Output 1 Rate Press U to increase the Pulse Output Rate by a factor of 10 Press V to ...

Page 25: ... suit a wide variety of data logging building management type applications During programming the Pulse Output 2 Rate is displayed scaled as the total varh register for convenience A display of PL 2 rAtE 10 0 kVArh indicates that a single pulse will occur at output 2 at the end of each 10 kvarh Figure 4 4 Setting The Pulse Output 2 Rate Press U to increase the Pulse Output Rate by a factor of 10 P...

Page 26: ...10 2500 seconds steps of 10s This period may be selected to set a convenient filter for short term fluctuations in input power as required During programming the Average Period is displayed in seconds Figure 4 5 Setting Ampere Demand Period Press U to increase the Averaging Period by 10 seconds Press V to decrease the Averaging Period by 10 seconds Press and hold for 2 seconds when done ...

Page 27: ...inutes This period may be selected to match specific standards or to set a convenient filter for short term fluctuations in input power as required During programming the Average Period is displayed in minutes Figure 4 6 Setting Watts Rolling Demand Period Press U to increase the Averaging Period by 1 minute Press V to decrease the Averaging Period by 1 minute Press and hold for 2 seconds when don...

Page 28: ...CT Ib 1 Amp optional Fully Isolated 2 5kV 1 minute Measurement Range Voltage Current 20 to 120 0 5 to 120 Frequency Range Fundamental Harmonics 45 to 65Hz Up to 20th harmonic Input Loading Voltage Current Less than 0 1 VA Less than 0 1 VA Overloads Voltage Current x2 for 2 seconds maximum x40 for 0 5 seconds maximum Auxiliary Supply Standard 230 Volt 50 60Hz 15 Options 110 Volt 50 60Hz 15 Others t...

Page 29: ...egisters Class 2 0 IEC 1268 Timebase Better than 100ppm Display Display Type Custom supertwist LCD with LED backlight Data Retention 10 years minimum Stores energy registers user settings and peaks Display Format Display Update 3 Lines 12mm digits 3 8mm custom legends 1 second Digital Pulse Outputs Function 1 pulse energy unit Output 1 N Import Wh Output 2 N Export Wh Scaling Settable 1 10 or 100 ...

Page 30: ... deg C to 65 deg C 25 deg C to 70 deg C Environment IP54 Humidity 75 non condensing Mechanical Enclosure DIN 96mm x 96mm Mablex ULV94 V O Dimensions 96mm x 96mm x 80mm 72mm behind panel 130mm behind panel with options unit fitted Weight Approx 400g Terminals Rising Cage 4 0mm2 cable max ...

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Page 32: ... Design Electronics Ltd 228 Bolton Road Bradford West Yorkshire BD3 0QW England Telephone 44 0 1274 729533 Fax 44 0 1274 721074 Email sales ndmeter co uk Or support ndmeter co uk Copyright Northern Design 2004 ...

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