Mianyang Weibo Electronic WBI417S41 User manual

Designing, Manufacturing and Supplying WB Series Electric Isolated Transducer and
Digital Electrical Transducer since 1989
USER MANUAL
WBI417S41 TRUE RMS SENSING
AC current transducer
www.weiboelectronic.cn
[email protected]
Tel: [phone]
Fax: [phone]
ISO9001/ ISO14000/ ISO18000 /Certified Company

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Mianyang Weibo Electronics Co.,Limited
No.98 Youxian East Road, Youxian District, Mianyang City, P.R. China
Tel: [phone] Fax: [phone]
www.weiboelectronic.cn
[e-mail]
WBI417S41 TRUE RMS SENSING AC current transducer
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 will be associated with the equipment will 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 or 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

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Product Description and Application
WBI417S41 converts AC input current into a load independent output signal true RMS (0)4-20mA. It
has adopted electromagnetic isolation principle for real time measurement of AC current from electric
net or electric circuit. It is good application for measurement of distorted current waveform.
The product has certain advantages of total galvanic isolation between input/output, high accuracy, low
drifting by temperature, and wide temperature bearable range, etc.
Product Dimensional Drawing (unit: mm)
Aperture Size: 4 mm
Product Terminal Identification Drawing
Input I
9
Auxiliary Power/Output Ground（GND）
Auxiliary Power（+E）
1
3
4
Output (Iz)
Non-identified terminal cannot be used
Mianyang Weibo Electronics Co.,Limited
No.98 Youxian East Road, Youxian District, Mianyang City, P.R. China
Tel: [phone] Fax: [phone]
www.weiboelectronic.cn
[e-mail]

3
Mianyang Weibo Electronics Co.,Limited
No.98 Youxian East Road, Youxian District, Mianyang City, P.R. China
Tel: [phone] Fax: [phone]
www.weiboelectronic.cn
[e-mail]
Key Technical Data:
1. Input: AC 0~0.5A; 0-1A; 0-2A; 0-3A; 0-5A; 0-8A; ( Optional)
2. Output: TRUE RMS 0-20mA or 4-20mA;
3. Accuracy class: 0.2
4. Frequency range: 25Hz～1kHz
5. Linear Range: 0~120% of nominal input
6. Responding Time: 300ms
7. Over Load Capacity: 20 times of nominal input, continuous 1 second; interval 300 seconds, repeat
5 times;
8. Auxiliary Power: +12VDC or +24VDC;
9. Load capacity: 6V;
10. Current consumption for static status: 24mA
11. Isolation Voltage (Input versus Output): ≥2500V DC; for 1 minute
12. Output Ripple: ＜4mV (root-mean-square value, output load is 250Ohm)
13. Drifting by Temperature: 200×10-6/℃，
14. Ambient Temperature: (Commercial grade) 0℃~50℃
(Industrial grade)-25℃～+70℃
15. Mounting : DIN Rail 35mm Mounting or screw mounting
Instruction of Installation and Use
1. The product has adopted structure compliance with EN50022; suitable for DIN rail mounting
NS35/7.5, NS35/15. Installation steps are as following (please reference to dimensional
drawing):
Step 1: Immobilize one side of product‘s mounting trough to the DIN mounting rail;
Step 2: Pull out the spring clasp;
Step 3: Place whole mounting trough to the DIN mounting rail properly;
Step 4: Release spring clasp to make sure the installation.
2. The product has calibrated before out of factory. After correctly wiring, it can be powered and
used immediately. But for further precise signal sampling, user needs to warm-up the product
for 3 minutes before use.

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3. The auxiliary power requires isolation voltage≥2000VAC, DC current output ripple＜10mV.
4. Multiple transducers can share with one set auxiliary power together., and the wire shared
between the transducers and power should be short. It's better to connect each transducer to
the auxiliary power individually.
5. Wiring in terms of the terminal identification drawing strictly.
6. Basic testing method for accuracy
(1) According to the terminal definition table to connect the testing circuit;
(2) The testing must to be done by under the following conditions；
Auxiliary power: 24V±5％，ripple≤5mV
Ambient temperature: 25℃±5℃
Relative humidity: RH(45～75)％
Accuracy for Signal Power Source instrument: 0.05
Signal
Source
Transducer
Power Supply
250Ohm
3
1
-
+ V1
R
-
3
6 +
V2
-
(3) Warming up the transducer for 3 minutes
(4) using output monitoring meter V1 to measuring the output of signal power source
instrument, set a any input value which is within the measuring range of the
transducer Ir (e.g. if input value is 5A, the output is 4mA～20mA, the expected
output value Iz should be calculated as:
Iz = (20mA－4mA)×Ir/5A＋4mA
Mianyang Weibo Electronics Co.,Limited
No.98 Youxian East Road, Youxian District, Mianyang City, P.R. China
Tel: [phone] Fax: [phone]
www.weiboelectronic.cn
[e-mail]

5
Mianyang Weibo Electronics Co.,Limited
No.98 Youxian East Road, Youxian District, Mianyang City, P.R. China
Tel: [phone] Fax: [phone]
www.weiboelectronic.cn
[e-mail]
(5) Using output monitoring meter V2 to measuring the output voltage Uo of the
transducer, the basic introduced errorγof the transducer should be calculated as:
γ= (Uo－Iz×250Ω)/[(20mA－4mA)×250Ω]×100
(6) Repeating step (4) (5), if calculated absolute value is less than the given accuracy
value of the transducer; it shows the transducer’s accurate grade is qualified.
Caution:
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.