DL

People's Republic of China Electric Power Industry Standard

DL500-92

Published 1992-11-28 1993-05-01 implementation

People's Republic of China Department of Energy published

Table of Contents

theme of the content and scope of application ……………………………………………… (1)

quoted standard……………………………………………………………………………… (1)

terminology, symbols, code-named …………………………………………………… (1)

Product Classification and model the meaning of……………………………………………… (2)

Technical Requirements……………………………………………………………………… (3)

Test method ………………………………………………………………………………… (6)

inspection rules ……………………………………………………………………………(11)

logo, packaging, transportation, storage……………………………………………………… (12)

People's Republic of China Electric Power Industry Standard

Table of Contents

1 theme of the content and scope of application

2 quoted standard

3 terminology, symbols, code-named

4 Product Classification and model the meaning of

5 Technical Requirements

6 test method

7 inspection rules

8 logo, packaging, transportation, storage

Voltage monitor orders technical conditions

1 theme of the content and scope of application

1.1 Subject Matter

The standard voltage monitor terms, product classification, technical requirements, test methods, inspection rules and signs and so on.

1.2 Scope

This standard applies to on the power system with the normal operation of a state of slow change in voltage deviation caused by continuous monitoring and statistics function of equipment or instruments, such equipment or instrument by product classification of the environmental conditions are essentially GB6587.1 provided equipment group Ⅱ , and its transport pilot rating of 2; by product safety requirements for classification are set forth in GB4793 Class Ⅰ security apparatus.

2 quoted standard

Power Quality GB12325 allow supply voltage deviation

SD325 power system voltage and reactive technical guidelines

GB6587.1 environmental testing of electronic measuring instruments SOMAD

GB6587.2 electronic measuring instruments temperature test

GB6587.3 humidity tests of electronic measuring instruments

GB6587.4 electronic measuring instruments vibration test

GB6587.5 electronic measuring instruments impact test

GB6587.6 transport pilot electronic measuring instruments

GB6587.7 electronic measuring instruments basic safety test

GB6587.8 electronic measuring instruments power frequency and voltage test

GB4793 safety requirements for electronic measuring instruments

GB6593 electronic measuring instruments testing rules

Power system harmonics management SD126 Provisions

3 terminology, symbols, code-named

3.1 voltage deviation

The normal operation of power systems as a result of the state of slow change, so that offset voltage occurs, the voltage deviation of the actual operating voltage value and the system rated voltage value of the difference.

3.2-tuning voltage (standard) value (Ub)

In power system voltage monitoring points, or the voltage level of the user by the end of voltage electrical installation of the monitoring voltage monitor (hereinafter referred to monitor), the tuning voltage is in accordance with the provisions of GB12325 and SD325 bias voltage allows the upper limit of voltage standard values and lower limits of voltage standard value.

3.3 start-up voltage (Uq)

Just drive monitor transfinite time, and exceeded the corresponding indicator appears to be stable voltage monitoring.

3.4 Setting the value of the basic error voltage (rz)

1992-11-28 People's Republic of China approved by the Department of Energy

1993-05-01 implementation

In normal use conditions, monitor the maximum and minimum levels of start-up voltage tuning voltage Uq and the corresponding tuning voltage (standard) the difference between the value of Ub and tuning voltage (standard) value of Ub ratio (expressed as a percentage).

r_z=…………………………………（1）

3.5 return voltage (Uf)

Just so that monitor the state of access to qualified from transfinite state has been monitoring the voltage value.

3.6 Sensitivity (K)

The maximum and minimum levels starting with the corresponding voltage to return to the absolute difference between the voltage and start-up voltage ratio (expressed as a percentage).

K=…………………………………（2）

3.7 has been monitoring the rated voltage (Un)

Been monitoring the monitoring system was rated voltage of rated voltage. Its value is 220,380 V, 3,6,10,35,63,110,220,330,550 kV, and so on.

3.8 rated voltage supply (Ug)

Monitor the work of the power of the rated voltage value. Its value is 100,220,380 V, and so on

3.9 integrated measurement error (rc)

In normal use conditions, was measured comprehensive measurements cx (such as the passing rate of voltage, voltage ultra-ceiling rate, the minimum rate of super-voltage, or voltage ultra-cap, super-maximum and minimum levels of supply time, etc.), corresponding to the preset value has been measured cy relative error (expressed as a percentage).

r_c=…………………………………（3）

3.10 clock error

In the time intervals in order to time the instructions said that the incremental deviation or reduction.

3.11 lost time power protection

When monitor power after losing their jobs, the standby power to ensure retention of the memory monitor data, and can continue to follow the provisions of the time when.

3.12 Voltage passing rate

Voltage quality monitoring statistics unit of time for the "min". Voltage passing rate calculation formula for

Voltage passing rate (%)=……………………………（4）

Note: The voltage monitoring the total time for the actual time the total power supply.

4 Product Classification and model the meaning of

4.1 Product Classification

4.1.1 by product category

a. Records of style.

Note: by monitoring voltage transfinite time and the total power supply time by the corresponding timer accumulated by the artificial calculated the passing rate of voltage monitor.

b. Statistical

Note: The microprocessor-based components, and can automatically record statistics monitor.

4.1.2 by way of sub-installed

a. hang-mounted;

b. slot-loading;

c. Taiwan-style home;

d. portable.

4.1.3 being monitored by the rated voltage points:

a. 3kV and above.

Note: Monitor sampling voltage from the power grid voltage transformer secondary voltage, and its ratings are 100V.

b.220V。

Note: for 220V single-phase power supply system.

c.380V。

Note: for 380V three-phase three-phase voltage power supply system to monitor the average passing rate.

4.2 Model meaning

5 Technical Requirements

5.1 Conditions of Use

5.1.1 normal use conditions:

5.1.1.1 ambient temperature: -5 ~ 40 ℃.

5.1.1.2 Relative Humidity: 40 ℃ 20% ~ 90%.

5.1.1.3 atmospheric pressure: 79.5 ~ 106.0kPa (an altitude of 2000m and below).

5.1.1.4 monitor the work of power supply in Table 1 under the conditions set out should work correctly.

5.1.2 Limit conditions:

5.1.2.1 ambient temperature: -20 ~ 50 ℃.

5.1.2.2 Relative Humidity: 50 ℃ at 90%.

5.1.3 transportation, storage conditions:

5.1.3.1 ambient temperature: -40 ~ 60 ℃.

5.1.3.2 Relative Humidity: 50 ℃ at 90%.

5.1.4 the surrounding environment requirements:

a. are not allowed to have a stronger vibration and shock;

b. electromagnetic field strength does not allow more than power plants, substations that may be encountered within the scope of the overall strength;

c. does not allow any damage to insulation corrosion of metals and gas and the existence of conductive medium, shall not contain the media explosion hazard, do not allow the existence of a serious mold.

Note: When the need to monitor installed in the not in conformity with the provisions of Article 5.1 of the environment, the purchase should be consultations with the factories.

5.2 Appearance

5.2.1 Monitor panel should be clean and beautiful, writing should be clearly visible, the display and adjust the device should be installed properly.

5.2.2 Monitor the outer surface should be smooth and no obvious mechanical damage and spalling coating layer and so on. Components should be installed correctly, a solid reliable, flexible, no loosening of the fastening parts. Plastic parts no bubbles, deformation and other defects.

5.3 security requirements

5.3.1 basic safety requirements:

5.3.1.1 Insulation resistance under normal conditions of use shall not be less than 5MΩ.

5.3.1.2 Dielectric strength: In the normal use conditions, monitor the test site should be able to withstand Table 2 provides the test requirements, and no breakdown and flashover occurred.

Table 2

5.3.1.3 Leakage Current: less than 3.5mA (AC RMS).

5.3.2 safety requirements:

5.3.2.1 monitor the tag should be in accordance with Article 5 of the GB4793 relevant requirements.

5.3.2.2 monitor temperatures in the limit should be able to maintain a normal working 24h, its main performance should meet the technical requirements of the relevant provisions.

5.3.2.3 monitor under the conditions of normal use, the temperature rise should be consistent with the provisions of Table 3.

Table 3

5.3.2.4 monitor the external structure should be fit for the first GB4793 the relevant provisions of 9.3.

5.3.2.5 monitor the event of the failure can easily become charged hit conductive parts, should be consistent with the protection of ground to make a direct connection, and to ensure good conductivity.

5.4 Functional Properties

5.4.1 basic functions;

5.4.1.1 monitor should have a monitoring voltage deviation and, directly or indirectly, Statistics voltage or voltage passing rate exceeded the rate of function.

5.4.1.2 record-type monitoring device should be able to store and display super-voltage cumulative time limit, the minimum voltage super time and voltage monitoring cumulative total of time.

5.4.1.3 type of statistical monitoring requirements are as follows:

a. statistical monitor should have a monthly and daily statistics function, can display or print voltage cumulative passing rate and the passing of time, voltage, ultra-ceiling rate and the corresponding cumulative time, the minimum rate of super-voltage and the corresponding cumulative time, at least for storage the previous month and the month, the day before and the day of recording data.

b. with the print function should also have a monitor on the whole point of printing, print average, maximum and minimum values and their corresponding times of printing, instant printing;

c. on a typical day monitoring data shows that print function monitor, the typical day can be set, the general of not less than 3 days;

d. can be provided for storage of tune-up or print the record and statistics;

e. monitor with the printer, the print may not have an impact on other functions;

f. shows year, month, day, hour, minute , seconds, and can automatically switch.

5.4.1.4 can be monitored real-time display voltage monitor, the refresh cycle for 2s, display spaces for the four, showing the value of relative error less than ± 0.5% ± 5 words.

5.4.2 should be able to monitor preset voltage rating monitored setting as required to monitor the voltage in the range of allowable deviation of the upper limit and lower limit, the tuning range should be monitored to meet the rated voltage Un ± 10% of the requirements . Setting can be preset or arbitrary set of control keys, must be the installation of locking devices or measures taken by encryption.

5.4.3 monitor should be set up automatic recovery system, recovery time should be less than or equal to 2s, allowing the use of its conditions, to consecutive normal work.

5.4.4 Monitor lose their jobs once the power supply, the work of its back-up power supply should ensure the protection of no less than loss of electricity 72h.

5.4.5 under the conditions of normal use, monitor its own power loss should be less than or equal to 3VA, and voltage transformer can be installed on the secondary side. On with a printer, power loss of more than 3VA monitor, you should use an external power supply.

5.4.6 Monitor being used to monitor the voltage RMS sampling, the sampling period of at least 1 times per second, and as a pretreatment value of storage. 1min as a statistical unit, taking 1min voltage pretreatment values within the average, as a real-time monitoring system on behalf of the actual operating voltage.

5.5 precision

5.5.1 under conditions of normal use, should ensure that monitoring in the monitoring of rated voltage Un ± 20% range of its comprehensive measurement error rc ≤ ± 0.5%.

5.5.2 in the normal use conditions, setting the upper limit voltage and lower limit of the basic errors are rZ ≤ ± 0.5%.

5.5.3 under the conditions of normal use, monitor the sensitivity of K ≤ 0.5%.

5.5.4 under the conditions of normal use, monitor the clock error within ± 1s not more than a day or a year of not more than ± 5min.

5.6 Environmental test requirements

Environmental testing requirements as set forth in table 4. After environmental testing, and monitor for visual inspection, should have no rust, cracks, peeling off coating layer, such as injury; text and logo should be clear; control mechanism should be flexible; fastening should be no loose parts; plastic pieces should be no foaming, cracking, deformation; mechanical components should be no break down, obviously deformed; electrical components should be no significant displacement or off. After environmental testing, according to the requirements of the project to test performance characteristics, the results should be in line with the first article 5.3,5.4 requirements.

Table 4

Continued table

5.7 monitor the reliability requirements of the working hours MTBF MTBF (lower limit) should be 10000h.

6 test method

6.1 Appearance Inspection

Monitor in non-working state, with operations in conjunction with visual inspection, the results should be in accordance with the provisions of Article 5.2.

6.2 Safety Test

6.2.1 basic safety tests:

a. insulation resistance measurement: Monitoring in non-working condition, connected to a power switch at the location megohm table with 500V power supply into line measurement of the shell and to the insulation resistance, and its value should be in accordance with the provisions of Article section 5.3.1.1 (test, and test parts of parallel resistors and other components can be open);

b. Dielectric strength test: according to GB6587.7 section 3.2 of the relevant provisions of the implementation and the results should be in accordance with paragraph 5.3.1.2 the provisions of Article;

c. leakage current test: GB6587.7 by Article 3.3 of the relevant provisions of the implementation of the results should be in accordance with section 5.3.1.3 of the Ordinance.

6.2.2 security test:

a. temperature rise test: monitor the use of ambient temperature in the normal upper limit of ± 2 ℃, as well as supply voltage ± 2% upper limit of experimental conditions, which lasted 24h, the temperature rise should be consistent with the 5.3.2.3 Article;

b. conductive properties Inspection: Measuring reach and protection of electrical connection between the grounding terminal resistance test current should be 25A, at both ends of the voltage should not exceed 12.5V, the corresponding resistance value at this time should be not more than 0.5Ω;

c. fault conditions test (focused assessment transformer): The monitor will be sub-winding transformer short-circuit test simulation until fuse fuse protection, the pilot should not have open fires and electric shocks discharge of harmful gases (test directly Then in any sub-winding current limiting impedance remains work).

6.3 Functional Properties of inspection

6.3.1 test connection:

In the normal use conditions, the test monitor cable to connect by Figure 1. Test may allow the temperature of the maximum and minimum levels and room temperature respectively.

A A

T V V T

By monitoring the power Working power

Figure 1. Monitor features test connection

T-regulator; A-ammeter; V-Voltage Meter

6.3.2 test the basic functions: the setting was required to monitor the rated voltage, voltage setting, the lower limit and the voltage changes in the scope of monitoring and regulating the output voltage to the set range. When the monitoring time after more than 1min, for statistical monitoring can be significantly adjusted or printing methods, the output voltage cumulative time pass rate, voltage, ultra-ceiling rate, the minimum rate of super-voltage and the corresponding time; to record monitoring device, show that the total time voltage monitoring, voltage ultra-cap time, the minimum voltage super time. Changes in the size of the input signal, the next in less than 1min ago, while the output of the statistical value of the same, after the full 1min to change the statistics.

6.3.3 Print Control Test (only for printers equipped with the monitoring device is carried out):

a. into the month (day) the end of time, after a specified time later, that is, print out the month (day) of the statistics;

b . into a printing time and the necessary statistics, when the internal clock to reach the moment, that is, print out the relevant statistics. And print out the whole point of time the voltage statistics and on (date) the cumulative statistics;

c. on a typical day monitoring statistics, a typical day may order the printing of the whole point 24h statistics;

d. statistics, time, print and other functions of the test can be carried out.

6.3.4 blackout test:

a. monitored voltage signal disappears when the monitor should be an immediate cessation of statistical work, the internal clock continues to run, in terms of follow-up statistics, the automatic deduction of blackout time, and in accordance with Article 5.4.4 the provisions of Article;

b. Monitor Working power blackout, a backup power supply must immediately put into operation automatically, and in accordance with section 5.4.4 of the Ordinance.

6.3.5 locking device to check:

When the latch or encryption devices work, should no longer be able to monitor changes such as tuning voltage operation.

6.3.6 Multi-channel monitor test:

Statistics can be monitored on the multi-channel input signal monitor, test, asked to be monitoring the signal at the same time increase in the input. Test methods in accordance with paragraph 6.3.1 ~ the requirements of Article 6.3.5.

6.3.7 power loss test:

To monitor the imposition rated parameters and inputs used in its voltammetry measurement, the measured values in line with Article 5.4.5 loss provision.

6.4 Accuracy Test

6.4.1 Test conditions:

Bseline test should be carried out under the working conditions: ambient temperature 20 ± 2 ℃, relative humidity 45% ~ 75%, atmospheric pressure 79.5 ~ 106.0kPa, and meet the requirements of Table 1 power supply conditions. Experiments in the environment do not have a doubt, they can at a temperature of 20 ± 10 ℃, relative humidity is less than 75%, power supply voltage of Ug ± 20%, power frequency of 50Hz ± 5% under the condition of the pilot. Test wiring connections in accordance with Figure 2. In which the performance of the exchange of regulated power supply should be consistent with the testing requirements, monitor subjects must be placed in the corresponding temperatures. Before the test can be carried out on the warm-up monitoring.

A

T V

Figure 2 monitors the accuracy of tests wiring

T-regulator