Northern Design Cube400V User manual

Cube400V
Installation Guide
Revision 4
1 Safety
This instruction sheet gives details of safe installation and operation of the Cube400V electricity meter. Labels on each
meter give details of equipment ratings for safe operation. Take time to examine all labels before commencing installation.
Safety symbols on the meter have specific meanings as:
Caution Risk of Danger
Refer to Instructions
Danger
Risk of Electric Shock
Safety may be impaired if the instructions are not followed or the meter is used in a manner not
specified by the manufacturer.
Contains no user serviceable parts. Field wiring and commissioning should only be carried out
by qualified personnel, in compliance with applicable national regulations.
e.g. National Electrical Code (NEC) for US; Canadian Electrical Code for Canada
For further Information contact the manufacturer:
Address: Northern Design (Electronics) Ltd: 228 Bolton Road, Bradford, West Yorkshire, BD3 0QW. (UK)
Web: http://www.ndmeter.co.uk
Email: [e-mail]
2 Maintenance
The equipment should be maintained in good working order. Damaged equipment must be sent to the manufacturer (or
his authorised agent) for repair. The meter may be cleaned by wiping lightly with a soft cloth. No solvents or cleaning
agents should be used. All inputs and supplies must be isolated before cleaning any part of the equipment.
3 Intended Use
The Cube400V is a precision multi function electricity monitor which measures system power parameters, including kW,
Volts and Amps and displays them on an LCD. Measured parameters may be sent to remote systems for storage or
display using an optional communications interface (e.g. Modbus

RTU RS485 or Ethernet).
The Cube400V is intended for mounting in the faceplate (panel) of an electrical enclosure with only the front
keypad/display panel remaining accessible to an operator after installation. Panels should be 1mm to 4mm (0.04” to
0.16”) thick with a square cut-out of 92mm, +0.8/-0.0mm (3.62” +0.03” -0”). Insert the meter from the front of the panel,
slide the panel clips from the rear of the case and push firmly against the panel ensuring even pressure on each clip.
The safety of any system containing the meter as a component remains the responsibility of
the system manufacturer. After installation in a system, the ratings of the overall system, which
reflect the ratings of the meter, must be visible to the user.
A suitably located and easily reached switch or circuit breaker must be included as part of the
installation. This could, for example, be a safety-interlocking device on the door/front panel of
the electrical enclosure. This switch/circuit breaker must be marked as the disconnecting
device for the equipment and must comply with the relevant requirements of IEC 60947-1 and
IEC 60947-3.
Disconnect / Isolate all supplies before commencing installation.

4 Standard Connections
4.1 Current Transducers
Only current transducers which meet the manufacturer’s specifications should be used.
Current Transducer (CT) connections are not galvanically isolated from the voltage inputs and
must therefore not be accessible to the operator after installation. Installed CT cables and any
extensions to these, must not be accessible to the operator.
Minimum Current Transducer Specification:
Input Current Range: 0 to 1.2 In (In = nominal rated current in amps)
Output Voltage: 0.33Vac at In
Insulation: 600Vac (Core to secondary conductors)
Cable: Operating Temperature, 105°C (221°F)
Insulated 600Vac
The following list of UL & CE recognised current transducers has been approved for use with the Cube/Rail series of meters:
Part Number Primary Current (XXX) Secondary Window Size
XFR/S0142/XXX 5, 10, 30, 50, 75, 100, 150, 200Amps 0.333Vac 19.1 x 19.1mm(0.75” x 0.75”)
XFR/S0152/XXX 75, 100, 150, 200, 300, 400, 600Amps 0.333Vac 31.8 x 31.8mm (1.25” x 1.25”)
XFR/S0162/XXX 100, 200, 300, 600, 800, 1000, 1500Amps 0.333Vac 50.8 x 50.8mm (2.0” x 2.0”)
XFR/S1142/XXX 5, 10, 30, 50, 70, 100, 150, 200Amps 0.333Vac 19.1 x 19.1mm(0.75” x 0.75”)
XFR/S1152/XXX 50, 70, 100, 150, 200, 250, 300, 400, 600Amps 0.333Vac 31.8 x 31.8mm (1.25” x 1.25”)
XFR/S1162/XXX 100, 200, 300, 400, 600, 800, 1000, 1200, 1500Amps 0.333Vac 50.8 x 50.8mm (2.0” x 2.0”)
XFR/S1172/XXX
1
400, 600, 800, 1000, 2000, 3000Amps 0.333Vac 127.0 x 76.2mm (5.0” x 3.0”)
NOTE 1: Model XFR/S1172/XXX is only approved for use up to an ambient temperature of 30ºC (86°F). All other models
are approved for use up to 55ºC (131°F).
If the current transducer secondary cables require extending, care must be taken to avoid pickup of electrical interference.
With suitable low capacitance screened cables, the cable can be extended to 100m (328ft) or more.
Extensions to the supplied current transducer cables must ensure all connections remain
inaccessible to the operator after installation.
All cables and connections must meet the minimum specifications provided.
4.2 Voltage Connections
To maintain proper insulation from the mains supply, the neutral wire should only be used in
power networks where the system neutral is protectively earthed
4.2.1 Voltage Cables
Voltage cables must be rated for safe use in the electrical enclosure which houses the meter
(e.g. UL1015) and must meet the following minimum specification: Temperature: 105°C
(221°F); Insulation 600Vac.
4.2.2 Auxiliary Mains Supply
The meter is powered from an auxiliary mains supply which is required to energise the metering circuit and display. This
can be connected in parallel with one of the measurement phase voltages if it is rated correctly.
Ensure the auxiliary mains supply L-N is powered from a correctly rated and fused AC source
as specified on the meter label.
4.2.3 Voltage Terminals
Voltage: 277Vac (3-4)
480Vac (4-5, 5-6)
Cable: 30-14 AWG, Stripped 5.5 to 6.5mm (0.2” to 0.25”)
Torque: 0.5Nm (4.4in lb)

4.2.4 Voltage Fuses
Fuses (US/Canada)
Rated Voltage Type Rupture In (A) Standards
≥500Vac Fast 1.0A UL248 (US)
C22.2 No. 248 (CAN)
Fuses (Other Countries)
Rated Voltage Type Rupture In (A) Standards
≥500Vac Fast 1.0A IEC 60269 - 2
4.2.5 Auxiliary Mains Fuses
Fuses (US/Canada)
Rated Voltage Type Rupture In (A) Standards
≥250Vac Fast 0.1A UL248 (US)
C22.2 No. 248 (CAN)
Fuses (Other Countries)
Rated Voltage Type Rupture In (A) Standards
≥250Vac Fast 0.1A IEC 60269 - 2
4.3 Communications Options
Communications outputs are safety isolated from the measurement voltages at a minimum of 3.5kV.
Communications cables running within an electrical enclosure may come close to high voltages
and therefore must be insulated to the following minimum specification:
Safety Compliant: e.g UL1015; Operating Temperature: 105°C (221°F); Insulation 600Vac
4.3.1 RS485 Output Terminals (Optional)
Voltage: 30Vdc
Cable: 30-14 AWG, Stripped 5.5 to 6.5mm (0.2” to 0.25”)
Torque: 0.5Nm (4.4in lb)
4.3.2 Ethernet Output (Optional)
Connection: RJ45
Cable: Cat5e FTP (Foil screened)
4.4 Pulse Output Connections
The pulse outputs take the form of isolated volt free normally
open contact pairs. Pulse 1 is associated with active energy
(kWh) and Pulse 2 with reactive energy (kvarh).
The contacts are isolated from all other circuits (3.5kV).
Pulses can be used as input to remote counters, pulse loggers,
building energy management system etc.
Light emitting diodes and remain ON
during each associated output pulse.
Pulse output cables running within an electrical enclosure may come close to high voltages
and therefore must be insulated to the following minimum specification:
Safety Compliant: e.g UL1015; Operating Temperature: 105°C (221°F); Insulation 600Vac
4.4.1 Pulse Output Terminals
Voltage: 70Vdc/33Vac (13-14, 13a-14a)
Cable: 30-14 AWG, Stripped 6.0 to 7.0mm (0.24” to 0.28”)
Torque: 0.5Nm (4.4in lb)

4.5 Typical Connections
3-Phase 3 or 4-Wire (*Optional Neutral)
Single Phase
NOTE: For single phase systems it is advisable to link out unused current inputs (9-10 and 11-12) with a short insulated
wire link. This prevents unwanted noise affecting meter readings.

5 Display Menus
+
Enter/Exit Quality Menu
5
A
150.0
150.0
150.0
230.0
230.0
V
230.0
-
kVAr
3-Phase
239.0
276.0
kVA
138.0
kW
kWh
1234567.8
RMS Phase Amps RMS Phase Volts System Power
1
Real Energy (kWh)
3 4
Amps Quality Menu
/ Next/Prev
Pk hold
A
150.0
150.0
150.0
L-L
400.0
400.0
V
400.0
46.00
46.00
46.00
kW
kVArh
1234567.8
THD
15.0
15.0
A%
15.0
Peak Hold Amps
3
RMS Line-Line Volts Per-Phase Real Power Reactive Energy (kvarh)
3 4
Total Amps % Distortion
A
T-Avg
150.0
150.0
150.0
Pk hold
230.0
230.0
V
230.0
bal
A
3-Phase
10.0
50.0
Hz
1.000
Cos∅
∅∅
∅
KVA h
1234567.8
10.0
10.0
A%
02 10.0
Harmonic
Time-Averaged Amps Peak Hold Volts
3
System Page 2
1
Apparent Energy (kVAh)
3 4
Amps Harmonics 2-15
Pk hold
A
T-Avg
150.0
150.0
150.0
T-Avg
230.0
230.0
V
230.0
KVA
46.00
460.0
46.00
HRs
Run
1234567.8
V olts Quality Menu
/ Next/Prev
Peak Time-Averaged Amps
3
Time-Averaged Volts Per-Phase Apparent Power Hours Run
2
Pk hold
T-Avg
230.0
230.0
V
230.0
-
KVAr
-
46.00
460.0
-46.00
Export
kWh
1234567.8
THD
15.0
15.0
V%
15.0
Peak Time-Averaged Volts
3
Per-Phase Reactivet Power
1
Export Real Energy
3 4
Total Volts % Distortion
1.000
1.000
1.000
Cos∅
∅∅
∅
Export
kVArh
1234567.8
10.0
10.0
V%
02 10.0
Harmonic
Per-Phase Power Factor
1
Export Reactive Energy
3 4
Volts Harmonics 2-15
MD
kVAr
3-Phase
239.0
276.0
kVA
138.0
kW
Power Maximum-Demand
1
Pk hold MD
kVAr
3-Phase
239.0
276.0
kVA
138.0
kW
Peak-Hold Mean-Demand
1
Note 1: A display of after a value indicates a capacitive load.
Note 2: The Hours Run register accumulates the total time during which the real power (kW) exceeds a preset level.
This is always displayed with a resolution of 0.1hour.
The percentage level of kW at which the Hours Run register accumulates is user programmable from 1% to 100% of full
scale current. Hours run reset cannot be disabled.
Note 3: Press and together and hold for 2 seconds to reset the displayed value. This feature may be disabled
before mounting in a panel. Refer to Cube400 option links guide to disable
Note 4: Scaling of the energy registers is set by the nominal input currents and voltages and remains constant during
operation of the meter. Energy registers will each accumulate from zero to 99,999,999 then restart from zero.
Note 5: Power quality menus are optional on some meters.

6 Programming
A
Ct
Pri
L 200
Current Transformer Primary
V
Pt
Pri
L-L
L 480
and to enter programming.
or selects from the standard list of settings while L
LL
Lis displayed. (List Mode)
or increases or decreases the value while F
FF
Fis displayed. (Fine adjust)
and together to toggle between L
LL
Land F
FF
F. Accepts the set value.
Voltage Transformer Primary 6
MD
PER
ÄÅin
30
Set the integration period in minutes used for the sliding time window MD calculation for kW and
kvar.
or increments or decrements the value. Accepts the set value.
Power MD Integration Time
T-Avg
PER
SEC
10
Set the integration period in seconds used for the sliding time window calculation for voltage and
current.
or increments or decrements the value. Accepts the set value.
Current/Voltage Average Time
HRS
Run
SEt 250
kW
Set the instantaneous system kW level above which the Hours Run timer will accumulate. Below
this level Hours Run will remain unchanged.
or increments or decrements the value. Accepts the value.
Hours Run Trigger Point
kWh
PULS
RAtE
0.1
Set the amount of energy (kWh Pls1 kvarh pls2) required to trigger each Pulse Output.
or selects the next/previous Pulse Rate. Accepts the value.
Pulse Rate (kWh per Pulse)
PULS
LE
0.1
Set the contact closure time for both pulse outputs.
or selects the next/previous Pulse Length from a standard list. Accepts the value.
Pulse On Period (Seconds)
PULS
TEST
Hld 999
Tests both pulse outputs and associated circuits without the need of a test load.
or starts/stops a test pulse stream. The display shows Hld (Hold) or RU . The
counter shows the total number of pulses during the test.
and reset the test counter to zero. exits pulse test mode. Pulse Test Mode
Note 6: If external VT is not used, DO NOT ALTER the voltage transformer primary setting for any other system voltage
i.e. for 110V, 208V, 230V system. LEAVE Un (Voltage Transformer Primary Setting) TO 480V ONLY.
If external VT is used, alter the voltage transformer primary setting as stated in the following examples.
For 11000/110V VT, alter the setting to 48000 (multiplying factor: 11000 / 110 = 100 i.e. 480X100)
For 6600/110V VT, alter the setting to 28800 (multiplying factor: 6600 / 110 = 60 i.e. 480X60)

7 Specification
INPUTS
System 3 Phase 3 or 4 Wire Unbalanced Load or Single Phase
Voltage Un 480/277V. 3 Phase 3 or 4 Wire
Current Sensors
Output @ Nominal In
Accuracy
Phase Error
0.333Vac
±1% (0.1In – 1.2In)
5A-50A Models <2.5°at 0.5In. Other models <2.0°at 0.5In
Measurement Range Voltage 20% to 120% Un
Current 0.2% to 120%
Frequency Range Fundamental 45 to 65Hz
Harmonics Up to 30th harmonic at 50Hz
Individual to the 15th
Voltage Burden <0.1VA per phase
Overload Voltage x4 for 1 hour
Current x2 Continuous
DISPLAY
Type Custom, Supertwist, LCD
Data Retention 10 years min. Stores kWh & Meter set-up
Format 2 Rows x 4 Digits, 1 Row x 8 Digits + Legends
Scaling Direct reading. User programmable CT & PT
CT Primary programmable from 5A to 25kA
VT primary programmable from 10V to 440kV
Legends Wh, kWh, MWh etc. depending on user settings
AUXILIARY SUPPLY
Standard 230V 50/60 Hz ±15%
Options 110V 50/60 Hz ±15%
Load 5 Watt Max.
Overload x1.2 continuous
METER ACCURACY All errors ± 1 digit
kWh Better than Class 1 per EN 62053-21 & BS 8431
Kvarh Better than Class 2 per EN 62053-23 & BS 8431
kW & kVA Better than Class 0.25 IEC 60688
kvar Better than Class 0.5 IEC 60688
Amps & Volts Class 0.1 IEC 60688 (0.01In – 1.2In or 0.1Un – 1.2Un)
PF ±0.2° (0.05In – 1.2In and 0.2Un – 1.2Un)
Neutral Current Class 0.5 IEC 60688 (0.05In – 1.2In)
OVERALL METERING ACCURACY
5A-50A Models
Other Models
Better than Class 2 Meter with Class 1 CTs
Better than Class 1 Meter with Class 1 CTs

PULSE OUTPUTS
Function 1 Pulse per unit of energy
Scaling Settable between 1 & 1000 counts of energy register
Pulse Period 0.1 sec. default; Settable between 0.1 and 20 sec
Rise & Fall Time < 2.0ms
Type N/O Volt free contact. Optically isolated BiFET
Contacts 100mA ac/dc max ; 70Vdc/33Vac max ; 5W maximum load
Isolation 3.5kV 50Hz 1 minute
MODBUS® Serial Comms (Option)
Bus Type RS485 2 wire + 0v. ½ Duplex, ¼ unit load
Protocol MODBUS® RTU with 16 bit CRC
Baud Rate 4800, 9600 or 19,200 User settable
Address 1 – 247 User settable
Latency Reply within 250ms max.
Command Rate New command within 5ms of previous one
Isolation 3.5kV
ETHERNET (Option)
Electrical IEEE std 802.3. 2000 Edition
Data Rate 10 Mbits/s
Protocol TCP, UDP, DHCP, FTP, TFTP, HTTP, SNTP, SNMP
Connection 10/100 Base T - RJ45
Isolation 3.5kV
GENERAL
Temperature Operating -10°C to +55°C (14°F to 131°F)
Storage -25°C to +70°C (-13°F to 158°F)
Humidity < 75% non-condensing
Environment IP54 (when correctly mounted, as described, in a panel)
Altitude <2000m (6561ft)
MECHANICAL
Terminals Rising Cage. 4mm
2
(12 AWG) cable max.
Enclosure DIN 43700 96 x 96
Material Mablex® with fire protection to UL94-V-O. Self extinguishing
Dimensions 96 x 96 mm x 83.5 mm (72 mm behind panel)
3.78” x 3.78” x 3.29” (2.83” behind the panel)
Weight ~ 250 gms
SAFETY
Conforms to EN 61010-1 Overvoltage Category III & BS 8431
E. & O. E.
© Northern Design (Electronics) Ltd, October 2016