JIANGSU Sfere720A User manual

Multi-function Power Meter
User Manual
Applied to:
Sfere720A
Sfere720B
JIANGSU SFERE ELECTRIC CO., LTD.

Safety instructions
Dangerous voltage!
Danger to life or risk of serious injury. Disconnect system
and device from power supply before beginning work.
Caution:
Please follow the documentation. This symbol warns of
possible danger that can arise during installation,
commissioning work.
CAUTION:
◆Make sure only the qualified technicians perform the installation and
maintenance;
◆Before performing wiring operation to the meter, make sure the CT input signal
and the power supply are switched off;
◆The electrical parameters supplied should be within the rated range;
The following situations may result in damages to the meter or cause mistakes in
the operation of the meter.
◆The voltage of the auxiliary power supply goes beyond the rated range.
◆The frequency of the power distribution system goes beyond the rated range.
◆The input polarity of the voltage or the current is incorrect.
◆Remove or connect the communication plugs without powering off.
◆Wrongly connected the signal terminal wires to power supply source.
Please don’t touch the rear terminals when the meter
is in operation!

Content
1. Product description.....................................................................................1
1.1 Compliance with standards.................................................................. 1
1.2 General................................................................................................. 1
1.3 Model selection.................................................................................... 2
2. Technical parameters.................................................................................. 3
2.1 Technical specification.......................................................................... 3
2.2 Function parameters............................................................................ 5
3. Installation and wiring................................................................................ 6
3.1 Meter dimensions.................................................................................6
3.2 Installation method.............................................................................. 6
3.3 Functions of wiring terminals............................................................... 7
3.4 Signal input wiring diagram.................................................................. 9
4. Display.......................................................................................................10
4.1 Panel description................................................................................ 10
4.2 Electrical variables display.................................................................. 10
4.2.1 Electrical variables display...........................................................11
4.2.2 Energy display..............................................................................15
4.2.3 Spare energy display....................................................................16
4.2.4 Harmonics display pages............................................................. 18
4.2.5 Demand value display pages....................................................... 20
4.2.6 Extreme value display..................................................................21
4.2.7 Tariff energy display pages.......................................................... 22
4.2.8 Time display.................................................................................27
4.3 Operation instruction for keys on panel.............................................27
4.3.1 Parameter setting menu structure.............................................. 29
4.3.2 System setting............................................................................. 32

4.3.3 Signal input setting...................................................................... 33
4.3.4 Communication setting............................................................... 34
4.3.5 Relay output setting.................................................................... 35
5. Communication.........................................................................................36
6. Extended function.....................................................................................36
6.1 Energy pulse output........................................................................... 36
6.2 Digital input........................................................................................ 37
6.3 Relay output....................................................................................... 37
6.4 Max./Min. value demand................................................................... 39
6.5 Event recording...................................................................................40
7. Common problems and troubleshooting................................................. 40
7.1 About communication........................................................................ 40
7.2 Measurements about U, I and P are incorrect................................... 41
7.3 About incorrect power running.......................................................... 41
7.4 Meter does not work.......................................................................... 42
7.5 The meter does not respond to any operation.................................. 42
7.6 Other abnormal phenomena..............................................................42

1
1. Product description
1.1 Compliance with standards
International standards
IEC62053-22:2003 Electricity metering equipment (a.c.)-Particular
requirements-Part 22: Static meters for active energy (classes 0,2S and 0,5S).
IEC62053-23:2003 Electricity metering equipment (a.c.)-Particular
requirements-Part 23: Static meters for reactive energy (classes 2 and 3).
IEC61010-1:2001 Safety requirements for electrical equipment for measurement,
control, and laboratory use – Part 1: General requirements.
IEC 61000-2-11 Electromagnetic compatibility (EMC)- Part 2-11
IEC60068-2-30 Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic
(12h+12h cycle)
1.2 General
SFERE720A/B multi-function power meters can measure voltage, current,
frequency, power, power factor, energy, harmonics and demand, record SOE events,
and realize off-limit alarm. They also have the functions such as communication,
digital input, relay output and energy pulse output. As an advanced smart digital
front-end acquisition components for grid, they are widely applied in many kinds of
control systems, energy management systems, substation automation systems,
power distribution automation systems, smart distributors and switch cabinets.
This series of products provide many wiring methods and convenient operation
methods which can meet different requirements at field.

2
1.3 Model selection
SFERE720A
SFERE720B
Appearance
and accuracy
Display mode
LCD
LCD
Installation mode
Panel
mounting
Panel
mounting
Active energy accuracy
0.5S
0.5S
Reactive energy accuracy
2S
2S
Real-time
measurement
U/I/P/Q/S/PF/F
▇
▇
Demand
▇
▇
Neutral current
-
▇
Energy
metering
Bi-directional energy
▇
▇
Four-quadrant reactive energy
▇
▇
Spare energy
-
▇
Tariff energy
-
▇
Power quality
Voltage/current THD
-
▇
Sub-harmonic content
-
2nd - 51st
Sequence component and phase
position of voltage and current
-
▇
Voltage and current unbalance
-
▇
Crest factor, current K factor
-
▇
Data record
Meter/load running time
▇
▇
Demand/max./min. Value record
-
▇
Off-limit record
-
▇
SOE event record
-
▇
Input and
output
Energy pulse output
▇
▇
RS485 communication interface
▇
▇
Digital input
-
▇
Relay output
-
▇
Note: ▇Yes;
— No

3
2. Technical parameters
2.1 Technical specification
Working environment
Working temperature
-10°C to 55°C
Storage temperature
-25°C to 70°C
Relative humidity
≤95% RH, no condensation
Working altitude
≤2500m
Protection degree
Front case IP64, rear case IP20.
Insulation
Between signal, power supply, output terminal to case
resistance >100MΩ
Working power supply
Rated range
AC/DC（20～300）V
Power consumption
≤5VA
Withstand voltage
≥2kV
Voltage input
Rated range
230V/400V（continuous: 1.2Un）
Resolution
0.1 V
Impedance
1.6 MΩ/per phase
Power consumption
≤0.1 VA /per phase
Over voltage
Instantaneous：2 times/10s
Frequency
45-65 Hz
Current input
Range
5A/1A, (continuous: 1.2In)
Resolution
1 mA
Impedance
≤20mΩ/per phase
Power consumption
≤0.2 VA/per phase
Over current
Instantaneous：10 times/5s
Relay output
Capacity
5A/250 VAC; 5A/30 VDC

4
Isolation voltage
Between contact and coil: 2000 VAC / min
Action time
10 ms max
Release time
5 ms max
Mechanical service life
106times
Energy pulse output
Pulse width
80ms±20%
Max. terminal voltage
35V
Max. terminal current
10mA
Pulse frequency
≤10Hz
Digital input
Sensitivity
ON:140～270V AC, OFF: <110 V AC
Isolation voltage
5000 VAC (1 min)
Scanning time
1 ms
Wave filtering time
30 ms
Communication interface
Physical interface
RS-485
Communication speed
Up to 115.2 kbps
Communication protocol
Modbus-RTU
Isolation voltage
2000 VAC (1 min)
Real-time clock
Error
≤0.5s/day
Electromagnetic compatibility
Electrostatic discharge immunity: IEC 61000-4-2-III
Radiated, radio-frequency, electromagnetic field immunity: IEC 61000-4-3-III
Electrical fast transient/burst immunity: IEC 61000-4-4-IV
Surge immunity: IEC 61000-4-5-IV
Immunity to conducted disturbances, induced by radio-frequency fields: IEC 61000-4-6-III
Power frequency magnetic field immunity: IEC 61000-4-8-III
Voltage dips, short interruptions and voltage variations immunity: IEC 61000-4-11-III

5
2.2 Function parameters
Functions
Sign
Accuracy
Range
Display range
Voltage
U
0.5
10--380 V
0--999.9 kV
Current
I
0.5
0--5 A
0--99.99 kA
Active power
P
0.5
0—5.7 kW
0--9999 MW
Reactive power
Q
0.5
0—5.7 kvar
0--9999 Mvar
Apparent power
S
0.5
0—5.7 kVA
0--9999 MVA
Power factor
PF
0.5
0--1.00
0--1.000
Frequency
F
±0.01Hz
45--65 Hz
45.00Hz-65.00 Hz
Active energy
EP
0.5s
--
0--99999999 MWh
Reactive energy
EQ
2
--
0--99999999 Mvarh
Voltage THD
THDu
Class A
51
0--99.99 %
Current THD
THDi
Class A
51
0--99.9 9%
Voltage sub-harmonic
content
HRUh
Class A
51
0--99.99 %
Current sub-harmonic
content
HRIh
Class A
51
0--99.99 %
Voltage unbalance
Uunb
Class B
--
--
Current unbalance
Iunb
Class B
--
--
Voltage sequence
component
U1, U2, U0
0.5
--
--
Voltage phase position
θU L1,θU L2,
θU L3
±0.1°
Current sequence
component
I1, I2, I0
0.5
--
--
Current phase position
θI L1, θI L2 ,θI L3
±0.1°
Extreme value
Max/Min
0.5
--
--
Demand
--
0.5
--
--

6
3. Installation and wiring
3.1 Meter dimensions
7.5 50.5
10(m ax)
□96
90
90
Picture 3-1 Meter dimensions
3.2 Installation method
Picture 3-2 Front view Picture 3-3 Back view

7
1) Open a 91×91（mm）hole on fixed switch gear；
2) Take the fixing claps off the meter；
3) Insert the meter to the cut-out；
4) Place the fixing claps, insert, fasten and fix the meter firmly on the panel.
3.3 Functions of wiring terminals
Function wiring terminals adopt the following numbers:
Power supply
1, 2
For AC and DC
Current signals
4, 5, 6, 7, 8, 9, 65, 66
Current input
Voltage signals
11, 12, 13, 14
Voltage input
Relay output
15—17
Two relay outputs
Energy pulse output
47, 48
Energy pulse output
RS485
communication
58, 59, 60
A, B and S severally.
Digital input
70—71, 72—73
Two digital inputs

8
Typical wiring diagram
Sfere720A
Sfere720B
12
L N
58
ABS
59 60
PC
RS232
RS485
1DI 2DI
～ ～
70 71 72 73
15 16 17
～～
Current Inputs
47 48
AP/RP
+
-
N
L
11 14
12 13
49
5678 6665
49
586 76665
I1 I2 I3 IN
S1 S2
S1 S2
S1 S2
S1 S2
V1 V3 N V2
V1
V2
V3
N
V1
V2
V3
N

9
3.4 Signal input wiring diagram
11 13 144 9 586 712
V1 V3 N
V2
I1 I2 I3
11 13 144 9 586 712
V1 V3 N
V2
I1 I2 I3
11 13 144 9 586 712
V1 V3 N
V2
I1 I2 I3
11 13 144 9 58
6712
V1 V3 N V2I1 I2 I3
11 13 144 9 58
6712
V1 V3 N V2I1 I2 I3
11 13 144 9 58
6712
V1 V3 N V2I1 I2 I3
11 13 144 9 586 712
V1 V3 N
V2
I1 I2 I3
11 13 144 9 586 712
V1 V3 N
V2
I1 I2 I3
11 13 144 9 586 712
V1 V3 N
V2
I1 I2 I3
S1 S2
S1 S2
S1 S2
S1 S2
S1 S2
S1 S2
S1 S2
S1 S2
S1 S2
S1 S2
S1 S2
S1 S2
S1 S2
S1 S2S1 S2
S1 S2
S1 S2
S1 S2 S1 S2 S1 S2
S1 S2
1-Phase,1CT,1PT
L
N
1-Phase,1CT,no PT
3P3W,3C T,no PT 3P3W,3 CT,2PT
L1
L2
L3
3P3W,3 CT,3P T 3P4W,3 CT,3P T
N
3P3W,2C T,no PT
3P3W,2 CT,2P T
L
N
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
L1
L2
L3
3P4W,3C T,no PT
N
L1
L2
L3
N
L1
L2
L3
N
L1
L2
L3
11 13 144 9 58
6712
V1 V3 N V2I1 I2 I3
S1 S2
S1 S2
(a) Input voltage can not be higher than the rated input voltage (100V or 380V)
of the product, or PT shall be considered to be used. For ease of maintenance,
we recommend to use the terminal block.
(b) Input current can not be higher than the rated input current (5A or 1A) of
the product, or CT shall be considered to be used. If the external CT is
connected with other meters, the tandem way shall be used for wiring. Before
removing the product’s current input wiring please cut off CT primary circuit or
short-circuit secondary circuit. For ease of maintenance, we recommend to use

10
the terminal block.
(c) To ensure the input three-phase voltage corresponding to the current, the
phase sequence and direction shall be consistent, or there will be numerical and
symbol error.
(d) External wiring must be same with the internal wiring setting of meter,
otherwise there will be a larger deviation for data measured by meter.
4. Display
4.1 Panel description
1
23
4
1－Model;
2－Phase indication;
3－Measured information and relevant information display;
4－Keys for switching display pages and setting parameters.
4.2 Electrical variables display
Meter measures and shows data of different types which are basic electrical
variables, bi-directional energy, spare energy, harmonics, demand, extreme value,
tariff energy and time. Press “ ” or “ ” to check the data of one type in cycle
sequence. Press “ ” to switch display pages between different types of data.

11
4.2.1 Electrical variables display
Electrical variables display pages show voltage, current, active power, reactive
power, apparent power, power factor, frequency and switch status. The detailed
instruction is shown as follows.
Table 4-1 Electrical variables display pages
Electrical variables display
Instruction
Three-phase voltage
U L1＝220.1V
U L2＝220.2V
U L3＝220.3V
Three-line voltage
U L12＝380.5V
U L23＝380.6V
U L31＝380.7V
Three-phase current
I L1＝500.1A
I L2＝500.2A
I L3＝500.3A

12
Frequency.
F＝50.00Hz
Three-phase active power,
P L1＝1901W
P L2＝1902W
P L3＝1903W
Three-phase reactive power.
Q L1＝1645var
Q L2＝1646var
Q L3＝1647var
Three-phase apparent power.
S L1＝14.7kVA
S L2＝14.8kVA
S L3＝14.9kVA

13
Total active power,
P＝5700W
Total reactive power.
Q＝4936var
Total apparent power
S＝45.7kVA
Three-phase power factor
PF L1＝0.950
PF L2＝0.960
PF L3＝0.970

14
Total power factor
PF＝1.000
Voltage unbalance
Uunb＝24.1%
Current unbalance
I unb＝5.8%
Neutral current
In＝5.06A
Note: if neutral current ratio is “0”, this page will not be
shown.

15
Digital input.
1 and 2 correspond to two digital inputs severally. If a
digital input acts, the corresponding number will flash.
Relay output.
1 and 2 correspond to two relay outputs severally. If
one relay output acts, the corresponding number will
flash.
4.2.2 Energy display
Energy display pages show bi-directional active and reactive energy, active and
reactive generator energy. The detailed instruction is shown as follows,
Table 4-2 Energy display pages
Energy display
Instruction
Import total active energy.
EP＝70005kWh

16
Export total active energy.
EP-＝9kWh
Import total reactive energy.
EQ＝650kvarh
Export total reactive energy.
EQ-＝0kvarh
4.2.3 Spare energy display
Spare energy display pages show active and reactive spare energy. When spare
energy metering starts, total energy metering will stop. The detailed instruction is
shown as follows,