Mianyang Weibo Electronic WB9128-1 User manual

Designing, Manufacturing and Supplying WB Series Electric Isolated Sensor and Digital
Electrical Transducer since 1989
USER MANUAL
WB9128-1 Power Transducer
(RS 485 Interface 3-phase 3 wire; 3 –phase 4-wire)
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Certified
Quality Warranty
Any quality problem found in WB series products, we offer
One year free charge of repair the products, and six months guaranteed free charge of change and return the
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WB9128-1 Power Transducer (RS 485 Interface)
Safety claim
The information in the safety claim of the equipment documentation is intended to ensure that equipment is
properly installed in order to maintain it in a condition.
It is assumed that everyone who would be associated with the equipment should be familiar with the contents of
that safety section, or this safety guide.
When electrical equipment is in operation, dangerous voltages will be present in certain parts of the equipment (e.g.
the input terminal). Failure to obverse warning notices, incorrect use, or improper use may endanger personnel and
equipment and course personal injury or physical damage.
Before working in the terminal strip area, the equipment must be isolated.
Proper and safe operation of the equipment depends on appropriate shipping and handling, proper storage,
installation and commissioning, and on careful operation, maintenance and servicing.
The operating manual for the equipment gives instructions for its installation, commissioning, and operation.
However, the manual cannot cover all conceivable circumstances or include detailed information on all topics. In
the event of questions or specific problem, do not take any action without proper authorization. Contact the
appropriate WB technical sales office and request the necessary information.
Standard application
1. Accuracy
Accurate degree is conformed to IEC688:1992
2. Safety
2.1 Overload capability
Overload capability is conformed to IEC688:1992
2.2 Isolation voltage
Can be endured testing voltage is conformed to Q/72085584-0.1-2004
2.3 Insulation impedance
The insulation impedance is no less than 20M Ohm, is conformed to Q/72085584-0.1-2004
3. Electromagnetic Capability
3.1 Electromagnetic field immunity test according to IEC 61000-4-3:1995
3.2 Power frequency magnetic field immunity test according to IEC 61000-4-8:1993
Product Description and Application
WB9128-1 adopts special made isolation module, professional MCU controller and high speed data synchronizing
sampling and processing technologies to isolate and convert active power of three-phase four-wired electric system
or 3 phase 3 wire system into RS485 bus and load independent output DC average current signal 4-20mA or
0-20mA and dc voltage signal 0-5V or 1-5V; It has certain advantages of input/output isolation, high
performance, low drifting by temperature, and low power consuming, etc.
Product Dimensional Drawing (unit: mm)
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Key Technical Data:
1. Input: Phase Voltage AC 57.7V ~ 289V; Line Voltage AC 100V ~500V; Current AC 1A~ 50A;
2. Input Configuration System: 3- phase 3- wire; 3- phase 4- wire;
3. Linear Measurement Range: Voltage 20% - 100% of rated input voltage; Current 1% - 100% of rated
input current; Power Factor: -0.1 – 1.0 -0.1;
4. Input Frequency: 50Hz;
5. Short Time Over Load Capacity: 2 times of input voltage, continuous 1 second, interval 10 seconds;
repeat 10 times; 20 times of input current, continuous 1 second, interval 300 seconds, repeat 5 times;
6. Output Types: One channel RS 485; 2 – Channel analogue quantities;
7. Analogue Output Specifications: DC Voltage output:2.5V±2.5V; 0-5V; 1..5V;3V±2V; DC
Current:10mA ± 10mA; 0-20mA; 4-20mA; 12mA±8mA;
8. Output
Parameters:E,R,PQ,C,S,Ua,Ub,Uc,Uab,Ubc,Uac,Ia,Ib,Ic,Pa,Pb,Pc,Qa,Qb,Qc,Ca,Cb,CC,Sa,Sb,Sc
9. Accuracy Grade: Current, voltage 0.2% reactive/active power /power factor 0.5%
10. Response Time: 200ms;
11. Auxiliary Power Supply: DC 12V; DC 24V;
12. Static Current: 65mA;
13. Operating Temperature: 0-50 ℃;
14. Communication Protocol: Modbus – RTU;
15. Baud Rate: 300, 600, 1200,2400, 4800, 9600,19200,38400,57600,115200;
16. Parity Bit: odd, even, none;
17. EMC Index: Surge: power supply port, communication port, analogue output port, input port, ±2KV;
Highest Grade: 3; EFT（Electrical Fast Transient）protection: ±2KV;
18. Stop Bit: Odd Parity 1 stop bit; Even Parity 1 stop bit; None Parity 1 stop bit; None Parity 2 stop bite;
19. Address: 1 – 247;
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20. Voltage Insulation: dc 2500V; 1 minute;
21. Temperature Drift: 100 PPM;
22. Output Ripple: 10mV;
23. Mounting: DIN Rail 35mm Mounting;
Communication Protocol
Order Register
Address Content Meaning Byte
1 0
2 1 E Active Energy 4
3 2
4 3 R Reactive Energy 4
5 4 Psum Total Active Power 2
6 5 Qsum Total Reactive Power 2
7 6 Csum Total Power Factor 2
8 7 Ssum Total Apparent Power 2
9 8 Ua A Phase Voltage 2
10 9 Ub B Phase Voltage 2
11 10 Uc C Phase Voltage 2
12 11 Uca CA Line Voltage 2
13 12 Uab AB Line Voltage 2
14 13 Ubc BC Line Voltage 2
15 14 Ia A Phase Current 2
16 15 Ib B Phase Current 2
17 16 Ic C Phase Current 2
18 17 Pa A Phase Active Power 2
19 18 Pb B Phase Active Power 2
20 19 Pc C Phase Active Power 2
21 20 Qa A Phase Reactive Power 2
22 21 Qb B Phase Reactive Power 2
23 22 Qc C Phase Reactive Power 2
24 23 Ca A Phase Power Factor 2
25 24 Cb B Phase Power Factor 2
26 25 Cc C Phase Power Factor 2
27 26 Sa A Phase Apparent Power 2
28 27 Sc B Phase Apparent Power 2
29 28 Sc C Phase Apparent Power 2
Note 1: Output parameters of WB9128-1 power transducer can be selected by the User. Its default settings of
address is 1, baud rate is 9600 bps and 1 stop bit. If the user needs other settings of communication address, baud
rate, system types, output parameters and output specifications, WB9128-1 can be configured by configuration
software, please refer to 《WB9128-1 upper computer user configuration manual 》。
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Right Use of WB9128-1
1. Wiring: 3- phase 3 - wire ( notice: the user needs short circuit of pin 2, pin3, pin 4 first, then connect with
load
Load
Sensor
Current direction A
C
B
A
B
C
5 Pin
2、3、4Pin Short Circuit
1 Pin
11 pin
10 pin
9 pin
8 pin
7 pin
6 pin
Analogue
OUT2
RS485B
OUT1
RS485A
GND
+E
Analogue
RS485
Converter
PC Series Port
Power
Supply
Current direction
3-phase 4-wire
Load
Sensor
Current Direction A
C
B
A
B
C
N
5 pin
3 pin
1pin
2、4 pin
11 Pin
10 Pin
9 Pin
8 Pin
7 Pin
6 Pin
Analogue
OUT2
RS485B
OUT1
RS485A
GND
+E
Analogue
RS485
Converter
PC Series Port
Power
Supply
Current Direction
Current Direction
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2. RS 485 output data calculation method
Rx is parameter value returned by register; Umax represents rated voltage value; Imax represents rated
current value.
3 –phase 3-wire calculation
Parameter Name Calculation Method Data Format Parameter Content
Line Voltage Rx×Umax/ 3×0.0001 Unsigned Integer Uca,Ubc,Uab
Current Rx×Imax×0.0001 Unsigned Integer Ia,Ic
Power Factor Rx×0.0001 Signed Integer COSφ
Total Active Power Rx×Umax×Imax× 3
×0.0001 Signed Integer Psum
Total Reactive
Power
Rx×Umax×Imax× 3
×0.0001 Signed Integer Qsum
Total Apparent
Power
Rx×Umax×Imax× 3
×0.0001 Unsigned Integer Ssum
3-phase 4-wire calculation
Parameter Name Calculation Method Data Format Parameter Content
Phase Voltage Rx×Umax×0.0001 Unsigned Integer Ua,Ub,Uc,
Line Voltage Rx×Umax/ 3×0.0001 Unsigned Integer Uca,Ubc,Uab
Current Rx×Imax×0.0001 Unsigned Integer Ia,Ib,Ic
Power Factor Rx×0.0001 Signed Integer COSφ，COSφa， COSφb，COSφc
Active Power Rx×Umax×Imax× 0.0001 Signed Integer Pa,Pb,Pc
Reactive Power Rx×Umax×Imax× 0.0001 Signed Integer Qa,Qb,Qc
Apparent Power Rx×Umax×Imax
×0.0001 Unsigned Integer Sa,Sb,Sc
Total Active
Power Rx×Umax×Imax× 3×0.0001 Signed Integer Psum
Total Reactive
Power Rx×Umax×Imax× 3×0.0001 Signed Integer Qsum
Total Apparent
Power
Rx×Umax×Imax
×3×0.0001 Unsigned Integer Ssum
3. Analogue Output Data Calculation
3-phase 3-wire
Output Parameter Output
Specification
Actual Output Value Calculation Formula
U z ( Rated Output Line Voltage :V )
Iz (Rated Output Current : mA)
0V～5V Psum=( U z-0)/5×(Ux×Ix× 3)
1V～5V Psum=( U z-1)/4×(Ux×Ix× 3)
2.5V±2.5V Psum=( U z-2.5)/2.5×(Ux×Ix× 3)
3V±2V Psum=( U z-3)/2×(Ux×Ix× 3)
Psum
0mA～20mA Psum=( I z-0)/20×(Ux×Ix× 3)
Psum=( I z-4)/16×(Ux×Ix× 3 4mA～20mA )
Psum=( I z-10)/10×(Ux×Ix× 3 10mA±10mA )
Psum=( I z-12)/8×(Ux×Ix× 3 12mA±8mA )
0V～5V Qsum=( U z-0)/5×(Ux×Ix× 3)
Qsum=(
U z-1)/4×(Ux×Ix× 3 1V～5V )
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2.5V±2.5V Qsum=( U z-2.5)/2.5×(Ux×Ix× 3)
3V±2V Qsum=( U z-3)/2×(Ux×Ix× 3)
Qsum
Qsum=( I z-0)/20×(Ux×Ix× 3 0mA～20mA )
Qsum=( I z-4)/16×(Ux×Ix× 3 4mA～20mA )
Qsum=( I z-10)/10×(Ux×Ix× 3 10mA±10mA )
Qsum=( I z-20)/8×(Ux×Ix× 3 12mA±8mA )
0V～5V Csum=( U z-0)/5
1V～5V Csum=( U z-1)/4
2.5V±2.5V Csum=( U z-2.5)/2.5
3V±2V Csum=( U z-3)/2
Csum
0mA～20mA Csum=( I z-0)/20
Csum=( I z-4)/16 4mA～20mA
Csum=( I z-10)/10 10mA±10mA
Csum=( I z-12)/8 12mA±8mA
0V～5V Ssum=( U z-0)/5×(Ux×Ix× 3)
1V～5V Ssum=( U z-1)/4×(Ux×Ix× 3)
Ssum
Ssum=( I z-0)/20×(Ux×Ix× 3 0mA～20mA )
Ssum=( I z-4)/16×(Ux×Ix× 3 4mA～20mA )
0V～5V Uab、Ubc、Uca=( U z-0)/5×UxUab
1V～5V Uab、Ubc、Uca=( U z-1)/4×Ux
Ubc Uac
Uab、Ubc、Uca=( I z-0)/20×Ux 0mA～20mA
Uab、Ubc、Uca=( I z-4)/16×Ux 4mA～20mA
0V～5V Ia、Ic=( U z-0)/5× I x
1V～5V Ia、Ic=( U z-1)/4× I x
Ia
0mA～20mA Ia、Ic=( I z-0)/20× I x
Ic
4mA～20mA Ia、Ic=(
I z-4)/16× I x
3- Phase 4-wire
Parameter Name Output
Specifications
Actual Output Value Calculation Formula
U z ( Rated Output Line Voltage :V )
Iz (Rated Output Current : mA)
0V～5V Psum=( U z-0)/5×(Ux×Ix×3)
1V～5V Psum=( U z-1)/4×(Ux×Ix×3)
2.5V±2.5V Psum=( U z-2.5)/2.5×(Ux×Ix×3)
3V±2V Psum=( U z-3)/2×(Ux×Ix×3)
Psum
0mA～20mA Psum=( I z-0)/20×(Ux×Ix×3)
4mA～20mA Psum=( I z-4)/16×(Ux×Ix×3)
Psum=( I z-10)/10×(Ux×Ix×3) 10mA±10mA
Psum=( I z-12)/8×(Ux×Ix×3) 12mA±8mA
0V～5V Qsum=( U z-0)/5×(Ux×Ix×3)
1V～5V Qsum=( U z-1)/4×(Ux×Ix×3)
2.5V±2.5V Qsum=( U z-2.5)/2.5×(Ux×Ix×3)
3V±2V Qsum=( U z-3)/2×(Ux×Ix×3)
Qsum
0mA～20mA Qsum=( I z-0)/20×(Ux×Ix×3)
Qsum=( I z-4)/16×(Ux×Ix×3) 4mA～20mA
Qsum=( I z-10)/10×(Ux×Ix×3) 10mA±10mA
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Qsum=( I z-20)/8×(Ux×Ix×3) 12mA±8mA
0V～5V Csum=( U z-0)/5
1V～5V Csum=( U z-1)/4
2.5V±2.5V Csum=( U z-2.5)/2.5
3V±2V Csum=( U z-3)/2
Csum
0mA～20mA Csum=( I z-0)/20
Csum=( I z-4)/16 4mA～20mA
Csum=( I z-10)/10 10mA±10mA
Csum=( I z-12)/8 12mA±8mA
0V～5V Ssum=( U z-0)/5×(Ux×Ix×3)
1V～5V Ssum=( U z-1)/4×(Ux×Ix×3)
Ssum
0mA～20mA Ssum=( I z-0)/20×(Ux×Ix×3)
Ssum=(
I z-4)/16×(Ux×Ix×3) 4mA～20mA
0V～5V Ua、Ub、Uc=( U z-0)/5×UxUa
1V～5V Ua、Ub、Uc=( U z-1)/4×Ux
Ub
0mA～20mA Ua、Ub、Uc=( I z-0)/20×Ux
Uc
Ua、Ub、Uc=(
I z-4)/16×Ux 4mA～20mA
0V～5V Ia、Ib 、Ic=( U z-0)/5× I x Ia
1V～5V Ia、Ib 、Ic=( U z-1)/4× I x
Ib
0mA～20mA Ia、Ib 、Ic=( I z-0)/20× I x
Ic
4mA～20mA Ia、Ib 、Ic=(
I z-4)/16× I x
0V～5V Pa、Pb、Pc=( U z-0)/5×(Ux×Ix)
1V～5V Pa、Pb、Pc=( U z-1)/4×(Ux×Ix)
2.5V±2.5V Pa、Pb、Pc=( U z-2.5)/2.5×(Ux×Ix)
Pa
3V±2V Pa、Pb、Pc=( U z-3)/2×(Ux×Ix)
Pb
0mA～20mA Pa、Pb、Pc=( I z-0)/20×(Ux×Ix)
Pc
4mA～20mA Pa、Pb、Pc=( I z-4)/16×(Ux×Ix)
Pa、Pb、Pc=( I z-10)/10×(Ux×Ix) 10mA±10mA
Pa、Pb、Pc=( I z-12)/8×(Ux×Ix) 12mA±8mA
0V～5V Qa、Qb、Qc=( U z-0)/5×(Ux×Ix)
1V～5V Qa、Qb、Qc=( U z-1)/4×(Ux×Ix)
2.5V±2.5V Qa、Qb、Qc=( U z-2.5)/2.5×(Ux×Ix)
Qa
3V±2V Qa、Qb、Qc=( U z-3)/2×(Ux×Ix)
Qb
0mA～20mA Qa、Qb、Qc=( I z-0)/20×(Ux×Ix)
Qc
4mA～20mA Qa、Qb、Qc=( I z-4)/16×(Ux×Ix)
10mA±10mA Qa、Qb、Qc=( I z-10)/10×(Ux×Ix)
Qa、Qb、Qc=(
I z-20)/8×(Ux×Ix) 12mA±8mA
0V～5V Ca、Cb、Cc=( U z-0)/5 Ca
1V～5V Ca、Cb、Cc=( U z-1)/4
Cb
2.5V±2.5V Ca、Cb、Cc=( U z-2.5)/2.5
Cc
Ca、Cb、Cc=(
U z-3)/2
3V±2V
Caution:
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1. Pay attention to the auxiliary power information, especially the auxiliary power grade,
and polarity, other wise will damage the product.
2. Pay attention to the wire connection; wrong terminal connection will cause
malfunction of the product and even damage the product;
3. Don’t dismantle the product, and carry with care to avoiding bump and fall of the
product;
4. If the product has been using under the environment with strong magnetic field
interference, please pay attention to the shield of input wire, and the output signal wire
should be as short as possible. For product intensive installation, the space between
each product should not be smaller than 10mm.
5. Only use identified terminals.
6. There is no lightening strike prevention circuit design in this product. For out door and
hazardous environment using, please add protective alternatives.
7. This product uses fire prevent ABS crust, its temperature withstand is only limited as
+85℃, higher than this limitation will cause the product deformation. Please use and
store carefully.
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