|
US$209.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
HJ 681-2013: Electromagnetic environmental monitoring method for AC electric power transmission and distribution project (on trial)
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| HJ 681-2013 | English | 209 |
Add to Cart
|
3 days [Need to translate]
|
Electromagnetic environmental monitoring method for AC electric power transmission and distribution project (on trial)
| Valid |
HJ 681-2013
|
Standard similar to HJ 681-2013 HJ 511 HJ 945.3 HJ 943 Basic data | Standard ID | HJ 681-2013 (HJ681-2013) | | Description (Translated English) | Electromagnetic environmental monitoring method for AC electric power transmission and distribution project (on trial) | | Sector / Industry | Environmental Protection Industry Standard | | Word Count Estimation | 8,816 | | Quoted Standard | GB/T 2900.1 | | Regulation (derived from) | Ministry of Environmental Protection Bulletin 2013 No. 71 | | Issuing agency(ies) | Ministry of Ecology and Environment | | Summary | This standard specifies the AC Transmission frequency electric field generated by power frequency magnetic field monitoring methods. Wood standard applies to 110 kV voltage level and to h AC Transmission away. Other voltage levels of AC power transmission | HJ 681-2013: Electromagnetic environmental monitoring method for AC electric power transmission and distribution project (on trial)
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Electromagnetic environmental monitoring method for AC electric power transmission and distribution project (on trial)
AC Transmission Electromagnetic Environment Monitoring
(Trial)
Electromagnetic environmental monitoring method
for AC electric power transmission and distribution project
(On trial)
(Release)
People's Republic of China National Environmental Protection Standards
Issued on.2013-11-22
2014-01-01 implementation
Issued by the Ministry of Environmental Protection
Table of Contents
Preface .ii
1 Scope 1
2 Normative references 1
3 Terms and definitions ..1
4 monitoring technology requirements .1
5 Quality Assurance 3
Foreword
To implement the "People's Republic of China Environmental Protection Law", protecting the environment, safeguarding human health, specifications AC Transmission Electromagnetic Environment
Monitoring the development of this standard.
This standard specifies the content AC Transmission electromagnetic environment monitoring, methods and other technical requirements.
This standard is the first release.
This standard by the Ministry of Science, Technology and Environmental Protection, Division of radiation safety regulatory organizations to develop.
This standard is mainly drafted by. Environmental Protection Department of Environmental Radiation Monitoring Technical Center.
This standard MEP November 22, 2013 for approval.
This standard since January 1, 2014 implementation.
The standard explanation by the Ministry of Environmental Protection.
AC Transmission Electromagnetic Environment Monitoring (Trial)
1 Scope
This standard specifies the AC Transmission frequency electric field generated by power frequency magnetic field monitoring methods.
This standard applies to 110kV and above voltage AC power transmission project. Other voltage levels of AC Transmission Electromagnetic Loop
Environmental monitoring may be performed with reference to this standard.
2 Normative references
The standard content of the following documents cited in the articles. For undated references, the effective version applies to this standard.
GB/T 2900.1 Electrotechnical Basic terminology
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1 AC Transmission AC electric power transmission and distribution project
Powered by an AC voltage of the power features (mainly refers to the voltage) is transformed from electrical energy delivered to the power supply needs to work
Cheng, including transmission lines and substations (or switching stations, series compensation station).
3.2 frequency electric field power frequency electric field
Charge at any time intercropping 50Hz cycle of charge generated electric field. Measurement frequency electric field intensity of the physical quantity is the electric field strength, the unit
In volts per meter (V/m), commonly kilovolts per meter (kV/m) on the project.
3.3 power frequency magnetic field power frequency magnetic field
At any time intercropping 50Hz cycle generated by the current magnetic field. Measurement frequency magnetic field strength can be physical magnetic induction or magnetic field
Strength, the unit was Tesla (T) and amperes per meter (A/m), the engineering unit of magnetic induction popular micro tesla (μT).
4 Monitoring Technical Requirements
4.1 Monitoring Factors
AC power transmission project monitoring factors electromagnetic environment of power frequency electric field and power frequency magnetic fields, monitoring indicators were frequency electric field intensity and frequency
Magnetic induction (or magnetic field strength).
4.2 Monitoring Instruments
Frequency electric and magnetic fields should be monitored using a dedicated probe or power frequency electric and magnetic fields monitoring instruments. Frequency electric field and power frequency magnetic monitoring instruments
Field monitoring instrument can be a separate probe, the two may be synthesized instruments.
Power frequency electric and magnetic fields monitoring instrument probe may be one-dimensional or three-dimensional. You can only monitor the space electric field at a point in one direction one-dimensional probe
Or magnetic field strength; probes can simultaneously measure the three-dimensional space is a point in the electric field, the magnetic field intensity components of three mutually perpendicular directions (X, Y, Z) of.
The probe through the optical fiber and the host (handset) connected to a fiber length of not less than 2.5m. Applications Battery-powered monitoring instrument.
Frequency electric field probe holder monitoring instruments should be easy to damp non-conductive material.
Monitoring results of the monitoring instruments should be used in root mean square value of the instrument readings, the root mean square values see GB/T 2900.1.
4.3 Environmental conditions
Environmental conditions should be consistent with the instrument requirements. Monitoring should be carried out in the absence of rain, no fog, no snow weather. Monitoring ambient humidity
It should be 80% or less, to avoid leakage current monitoring instruments stents and other effects.
4.4 Monitoring Methods
Monitoring points should be selected on other power lines, communication lines and flat open space, away from trees and no broadcast lines.
Probe monitoring instruments should be set up in the ground (or based on the plane) above 1.5m height. You may also need to monitor the height of the other,
And indicated in the monitoring report.
While monitoring frequency electric field from the monitors and monitoring instrument probe shall be not less than 2.5m. Monitoring instruments and probes from fixed objects
From not less than 1m.
While monitoring frequency magnetic field, monitor the probe may be supported by a small dielectric handle, and can be hand-held by the monitors. One-dimensional probe
When monitoring labor frequency magnetic field should be adjusted so that the position of the probe in the direction of monitoring the maximum.
4.5 Monitoring Sites
4.5.1 Overhead Transmission Line
Monitoring section path should be chosen in the cross-sectional direction to span the central conductor sag lowest position, as shown in FIG. Single-circuit transmission line
Should be at the lowest position in the phase conductors to sag projected point as a starting point, multi-circuit transmission lines on the same tower should sag lowest position corresponding to span two
Connection to the central tower projected as a starting point, the monitoring points should be uniformly distributed over the cross-sectional direction of the edge on both sides of the phase conductors. For hung to tower mode
Symmetrically arranged transmission lines, simply arranged monitoring points in the direction of the cross section of the side of the tower. Monitoring point spacing is generally 5m, measured to the order
From the edge of the projected outer conductor at 50m so far. When measuring the maximum distance between two adjacent monitoring points should be less than 1m.
In addition to the cross-section line monitoring, but also in other locations line monitoring should be recorded and the relative position of the monitoring point line and around
Environmental conditions.
Figure 1 below the overhead transmission lines and power frequency magnetic field frequency electric field distribution diagram monitoring
4.5.2 underground transmission cables
þ þM6
Wire sag lowest position
, ¥
Under construction (structures) within the monitoring thereof, should be at a distance of 1.5m wall or other fixed object outside the area of the distribution. As it does not meet the distance
From the requirement, then take a plane home based position as a monitoring center point, but the distance around the monitoring point and fixed objects (such as walls) is not less than
1m.
Under construction (structures) balcony or terrace monitoring should be from the wall or other fixed object (such as a fence) regional distribution 1.5m away.
If you can not meet the distance requirements, balcony or terrace to take based on the plane center position as a monitoring point.
4.6 Data recording and processing
Carried out within the power transmission project uptime monitoring, continuous measurement of each monitoring point five times, each time monitoring of not less than 15 seconds and
Read steady state maximum. If the instrument readings undulating monitoring time should be extended.
Arithmetic mean calculated for each monitoring location 5 readings as the monitoring results.
In addition to monitoring data, to be recorded when monitoring temperature, relative humidity and other environmental conditions and monitoring equipment, monitoring time; for transmission
Lines should be recorded arrangement of wires, wire height, phase distance, wire and wire division model number, line voltage and current; for
Substation monitoring should be recorded at the location of equipment layout, equipment name, and bus voltage and current.
5 Quality Assurance
Select the location of the monitoring points should be representative.
Monitoring equipment should be used with the measured object is consistent in terms of frequency, range and response time.
Monitoring instruments must be regularly calibrated and used within the validity of his certificate. Monitoring both before and after each inspection equipment to ensure normal operation of the instrument
status.
Monitoring personnel shall be subject to professional training, pass the examination and obtain a certificate of jobs. On-site monitoring shall be not less than two monitors to
get on.
Monitoring of trade-offs, and data monitoring results should be statistically abnormal data processing principles.
Exclude confounding factors as possible when monitoring, including human disturbance factors and environmental disturbances.
Monitoring should establish a complete document file.
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of HJ 681-2013_English be delivered?Answer: Upon your order, we will start to translate HJ 681-2013_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time. Question 2: Can I share the purchased PDF of HJ 681-2013_English with my colleagues?Answer: Yes. The purchased PDF of HJ 681-2013_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to [email protected]. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.
|