The specific application of access control system

(1) Building Entrance Control
In the building, traditional access control management is often only set up in the various functional areas of non-public areas, and ignores the control of open access. For the purpose of improving the safety level of the whole building, it is more important to manage the public areas and public areas, and to exclude various security risks. Therefore, installing intelligent channel gates at the main entrances and exits of buildings can effectively manage the entrance and exit of buildings, thereby improving the building's safety. A set of two-way access gates are set up at the main entrance of the building (according to the width of the passages, a reasonable number of access gates are set). Internal staff of the building can freely access the access gates by virtue of the internal employee card issued by the Building Card System Center, and at the same time, each access gate. Above the installation of 2 sets (in and out of a) high-definition color camera (can clearly identify the characteristics of the person's face and body style clothing), in the same time when the staff swipe the camera to take pictures, the camera image of the card in detail recorded the entry and exit gates of the personnel Time images and other information are also stored in a large-capacity database, so that property and related personnel can make inquiries if needed. The internal employees of the building swiped in and out of the gates to realize the attendance management function, and the setting of entrance gates prevented the harassment of internal staff by busy people (such as malicious door-to-door sales personnel).

(2) Conference check-in
A set of access gates at the entrances and exits of large conference venues is used to sign conference attendance and control participants. Participants entered and exited the gate through the swiping card entrance and exit gates, which facilitated the attendance of the attendees and the statistics and inquiries of the meeting managers; they provided an easy solution to effectively control and manage the attendance and attendance of participants. At the same time, it has also euphemistically rejected the entry of non-attendants and safeguarded the order of the meetings. The management of the conference through the channel gate greatly reduces the workload of the conference service personnel and greatly improves the work efficiency of the exhibition.
(3) Consumption Management
A set of access gates are set up at the entrances and exits of some places that implement regular-rate consumption (canteens, restaurant cafeterias, bathing establishments, etc.). Consumers swipe cards to enter the consumption sites through the access gates, and the system automatically deducts corresponding fees according to the preset consumption amount. Amount, but also declined access to unauthorized card users. The entrance passage gate will automatically display the balance of the user's card on the lcd screen of the gate while the user swipes the card. If less than the minimum balance required for a single purchase, the gate will not open, and the user is reminded to recharge at the recharge. The management of these consumption sites through channel gates can ensure the orderly management of these sites and improve management efficiency.

(4) Visitor Management
Channel control through the channel gate controls visitor access. When there are outside visitors, visitors first report to the reception desk to explain the reason for the visit, the interviewed person and the expected visit time. The front desk receptionist shall contact the interviewee through the internal telephone of the building to confirm. After obtaining feedback from the respondents, the receptionist creates a visitor card through the card-issuing equipment. The information of the identity of the visitor (identity card, work permit, etc.) is entered into the card-making workstation through a dedicated document scanner and passes through the HD camera installed at the reception desk. Visitors are photographed and their identity image information is stored in the database. The receptionist then uses the information returned by the respondent to open the corresponding permissions to the visitor (such as elevator access, room access, restaurant consumption, etc.) and visitors. The time is set for aging. After the information such as the visitor's identity information and visitor's permission is entered, the card is automatically issued by the automatic card dispensing machine. Visitors enter the building through the access gate of the building by opening a visitor card with the corresponding authority; when the visit is over, visitors pass through the gate to exit the building and set up a “temporary card” automatic card receiving device at the exit of the access gate. The authority visitor inserts the visitor card into the automatic card receiving machine to receive the card and read the card out of the building. When the excess card or the timed guest card enters the card receiving device, the channel gate is yellow and an alarm sound is sent to inform the staff to deal with the situation. At the same time as visitors enter and exit the entrance gate of the building, the camera above the barrier gate also photographs the visitors and records information to save the database.
Of course, the self-driving visitor enters the building and the parking card is issued by the garage automatic card feeder at the entrance of the garage parking lot. Visitors only need to give the parking card to the reception staff to open the corresponding authority, without issuing the card twice, and the visitor who drives the visitor himself. The card can be taken back by the parking system. The automatic issuing of cards to the visitors and the automatic closing of the access gates greatly improve the management efficiency and increase the overall safety of the building.

I. High & Low voltage cabinets installation of power plant

1. 10KV high voltage switch cabinet installation of power plant

2. 0.4KV low voltage switch cabinet installation of power plant

3. Installation of generator protection system, synchronization system, transformer protection, H.V. motor protection, circuit protection in a power plant.

II. Electrical configuration testing items of power plant

1. Vacuum circuit breaker insulation resistance measurement, each phase circuit resistance measurement and AC voltage withstand tests of 10KV H.V. switch cabinet.

2. DC resistance measurement of CT and PT, polarity test, ratio test, AC voltage withstand tests in 10KV H.V. switch cabinet.

3. AC voltage withstand tests for whole 10KV H.V. switch cabinet.

4. AC resonant test for 10KV H.V. electric cable.

5. DC resistance measurement of generator stator and rotor.

6. Generator stator coil insulation resistance measurement and DC voltage withstand tests.

7. Generator rotor insulation resistance measurement.

8. Generator rotor AC impedance and power loss tests.

9. No-load characteristic test of generator

10. Generator checking phase sequence (fist checking phase and second checking phase separately).

11. Generator short circuit characteristic test.

12. Measurement of residual voltage of stator after automatic magnetic blow-out and switch opening of generator.

13. Generator shaft voltage measurement.

14. Generator simulate synchronization.

15. All of the second circuit checking, measuring, switch tripping & closing tests, protection fixed value setting, protecting the STG trip test and magnetic blow-out tripping test for Steam Turbine and generator.

III.Electrical problem troubleshooting in power plant

Problem Description: a coal mine`s 35KV H.T. switchgear OC protection tripped suddenly in He`nan Province, it caused sudden power lost of mine fan and endanger miner safety.

Auto-reclosing via switchgears` automatic reclosing function, through analysis, the reason is a set of 3000KW generator failure. Specific reason is: When the turbo-generator was running normally, exciting voltage lost suddenly, leading phase operation happened, the generator absorbed reactive power and lead to becoming motor running. Generator protection and power plant connecting line protection did not launch. After the generator absorbed a certain value of reactive power, the 35KV H.T. switchgear`s OC protection tripped.


Investigation: generator and power plant connecting line protection setting fixed value exceed the protection fixed value of 35KV switchgear side, it lead to nearby protection did not launch and override trip when generator failure.

Electrical Cabinet Care

Electrical Cabinet Care,10Kv Electrical Cabinet Care,0.4Kv Electrical Cabinet Care,Electric Governing Reconstructing

Shandong Qingneng Power Co., Ltd. , https://www.steamturbine.be