Leisike

1. On the installation site, what should I do if the cable length of the surge protector does not meet the requirement of 0.5m or less?

Answer: V-shaped wiring method can be used (Kevin wiring method)

2. The lightning protection device with acoustic and optical alarm (AS) function has an alarm, how should I deal with it?

Answer: First press the mute button, and then check the surge protection module to see whether the status indicator window of the module changes from green to red. If yes, replace the module. If the window without modules turns red, it may be that the surge protection modules are loose in the base. Press the modules one by one to check whether the alarm is lifted (the light turns green). If it still does not work, the alarm module is damaged and the base needs to be replaced.

3. After a large lightning strike, it is found that the series backup protection circuit breaker in front of the lightning arrester trips. Can I reset it directly?

Answer: No. If the lightning arrester is damaged by short circuit or is struck by lightning for a long time, the backup protection circuit breaker of the front stage of the lightning arrester may act. Therefore, before resetting the lightning arrester, you need to perform an aging test on the module to check whether the lightning arrester is damaged. If the lightning arrester is not damaged, you can reset the backup protection circuit breaker.

4. Lightning protectors and equipment were damaged by lightning. What happened?

Answer: The reason for this situation is usually that the flow rate of the lightning protection device is small or the lightning intensity is too large. The current capacity of the surge protector should be properly increased according to the onsite conditions and standard requirements.

5. Why is my equipment broken when there is no change in the lightning protection after the lightning strike?

There are several reasons why this happens:

A. Is the grounding reference point of the device proper? Is the length of the surge protection cable too long?

The cable connected to the SPD should not exceed 0.5m. To this end, the grounding reference point of the device should be as close to the SPD as possible, or the cable length of the SPD should be reduced in Kevin connection mode.

B. Is the equipment fully protected?

A device (or system) usually has several types of cables connected to it, such as power cables, signal cables, and ground cables. In this case, the device (or system) is safe only when all cables connected to the device (system) are connected to the ground system through the corresponding surge protection device. If only a power or signal surge protector is installed, the device or system security cannot be guaranteed.

C. Is the rated working voltage of the surge protector consistent with that of the device?

In particular, on some signal cables, the working voltage of the surge protector must match that of the signal cable interface to ensure that the voltage protection level of the surge protector is lower than the tolerance of the device.

6. How can I simply check whether the grounding terminal of a power socket is properly grounded?

Answer: Remove the two screws from the socket panel and check whether the ground cable is connected to the ground cable (PE) in the middle of the socket panel. If the ground cable is not connected to the PE in the middle, you can determine that the socket is not grounded.

B. Use a multimeter and set the multimeter to the AC voltage range. In the first step, use a red and black marker to measure the voltage of the live line and the neutral line respectively. The voltage measured in the following figure is 223 volts. Step 2 Insert the red watch pen into the live wire jack, and the black watch pen into the ground jack. The voltage measured was also 223 volts. In this case, it can be determined that the grounding cable is reliably grounded. If the voltage measured between the live wire and the ground wire is very low or zero, then the ground wire is not a valid and reliable ground wire.

C. review with lamp test under the head removal, the two wire front-end insulating layer peeling chardonnay 05 cm out of copper wire, carefully insert each of the two threads of fire jack, jack and ground light bulbs will light up at this moment, at the same time, home of the leakage protector will disconnect the power supply socket, this socket grounding line is really effective. If the bulb does not light up, the grounding wire of this socket is not effectively grounded and does not form a loop, so the bulb will not light up.

D. Use an electrical plug test, also known as a phase detector. This test plug is more convenient to use, can test whether the live wire, ground wire, neutral wire is connected backwards, whether the lack of neutral wire, ground wire, etc. Directly plug the plug into the socket, its corresponding indicator light will light up, as shown in the figure below, the middle red light on means that the ground wire is missing.

7. What are the components of lightning protection?

Answer: BASICALLY INCLUDE: DIRECT STRIKE LIGHTNING PROTECTION, SIDE STRIKE LIGHTNING PROTECTION, INDUCTION NEEDS TO PROTECT 3 MAJOR PARTS, AND USE THE TECHNICAL MEASURES SUCH AS CONNECT FLASH, SHUNT, SHIELD, EQUAL PRESSURE, EQUAL POTENTIAL, GROUND.

8. If lightning rods are already installed, do you need surge protection?

Answer: Still need. Lightning rods are no substitute for surge protection. Lightning rods divert most of the harmful energy produced by direct strikes from outside buildings into the ground, thus preventing buildings from catching fire or exploding. However, the need to strike can generate a huge magnetic field and create a powerful overvoltage on power and data lines. This is known as induction. Sensitive ELECTRICAL EQUIPMENT IN THE BUILDING CAN BE PROTECTED IF HIGH QUALITY SURGE PROTECTORS HAVE BEEN INSTALLED. But IF a LOW-quality surge protector is installed or not INSTALLED, equipment can still be damaged.

9. What is the difference between a power line protector (SPD) and a data line protector (DLP)? Is it possible to install only one type of protection?

A: Power surges can damage devices not only through power cables, but also through data cables. Any electrical equipment connected to the power supply can be damaged by a surge through the power line. Devices CONNECTED to moDEMS or COMPUTER NETWORKS also REQUIRE data line SURGE PROTECTORS TO PREVENT DAMAGE TO THE POWER SUPPLY.

10. Is it OK if the camera is only for power supply, or only for video/control protection?

Answer: No. Each kind of camera has at least two parts: power supply/video signal. The camera with gimbal control also has gimbal control circuit. Only doing power, or only doing video/control line protection is not comprehensive. Lightning overvoltage can be strung into the equipment from any unprotected lines, causing damage to the equipment.

11. What are the main types of arresters?

Answer: THE KIND OF ARRESTER BASICALLY DIVIDES THREE BIG TYPES: IT IS POWER SUPPLY ARRESTER (BASICALLY IS PARALLEL WAY WHEN INSTALLING, ALSO SERIES WAY), PRESS THE DIFFERENCE OF VOLTAGE, DIVIDE THE SINGLE-PHASE POWER ARRESTER OF 22V AND THE THREE-PHASE POWER SUPPLY ARRESTER OF 380V. The second is the signal arrester, most used in computer networks, communication systems, the installation of the way is series. The third is the sky feeder arrester, which is suitable for the transmitter antenna system and the receiving radio signal equipment system, the connection mode is also series.

12. The ground cable of the lightning arrester is directly connected to the lead line of the lightning rod.

Answer: The grounding wire of the lightning arrester is directly connected to the lead line of the lightning rod. Under the premise that the equipotential measures are perfect, the voltage is raised and lowered at the same time, and there will be no lightning. Because the lightning protection device connects the external line of the device with the ground wire, and the device shell is connected with the lead line: so when the lead line potential is raised, the potential of the line will be raised, and the voltage is unchanged.

13. Does the installation of the lightning protection device mean the completion of the lightning protection project?

A: Lightning protection is a system engineering. It includes external and internal lightning protection measures. External surge protection measures include the flash connector, lead off, grounding device, and shared grounding system. Internal lightning protection measures include shielding (isolation), equipotential connection, proper wiring, and surge protector (SPD) installation. Therefore, installing a surge protector is only a part of a surge protection project, not a dry surge protection project.

14. How to make ground?

Answer: For the grounding treatment of the dry outdoor camera, because the environment is changeable and complex, it is generally adopted to build a simple grounding network around the pole, or introduce a nearby grounding network that meets the requirements, or connect it with other grounding metals nearby. The distance is usually no more than 20 meters.

15. How to shield the camera line?

A: In order to avoid the coupling phenomenon on the line and the mutual inductance current between the lines, the line needs to be shielded. Both ends of the shield are grounded. The metal shielded wire grooves are used for wiring, and the metal ends of the wire grooves are grounded. The joints of the metal wire grooves should be bonded.

16. When is direct mine protection necessary for outdoor cameras?

A: If the outdoor camera is installed on the roof corner of a building, or on an isolated pole in an open area, or has been subjected to direct lightning strikes, direct lightning protection is recommended. Cameras usually installed on the sides of city roads and under the eaves of buildings do not require direct mine protection.

17. What is an equipotential connection? What about equipotential camera connections?

Answer: GB50057-94 equivalence potential connection definition: will separate devices, all conductive objects, such as equipotential connection conductor or electric protection device connected to reduce the potential difference between them.

In terms of equipotential of the camera, equipotential refers to the metal shell of the camera, frame, metal pipe, trough, outer layer of the shielded cable, ESD grounding, safety grounding, and SPD grounding terminal of the camera. The purpose of equipotential connection is to reduce the potential difference between the components of the equipment and unify the zero potential reference point of the system.

18. Is the lightning arrester connected to a special ground wire or directly connected to the support rod?

A: If the support rod is non-metallic, the SPD is connected to a special ground wire. If the support rod is a metal body, the grounding of the SPD can be connected to the nearby support rod on the premise that the ground grid and rod are reliably connected.

19. How to minimize grounding costs?

Answer: First, make full use of natural grounding bodies (building foundations, pipes, metal fences, etc., that are in reliable contact with the earth).

Secondly, when the natural grounding body fails to meet the requirements, an artificial grounding body should be added appropriately. The distribution of artificial grounding body should be reasonable to avoid the natural grounding body, and the combination should be reasonable.

Thirdly, the design of artificial grounding body should fully examine the local geography and geological structure; Choose the most reasonable method to make the ground net.

20. Do outdoor metal pole cameras need to be insulated from poles?

Answer: No, but a reliable equipotential connection is required. When a metal pole is hit by a direct lightning strike or a discharge of lightning current, a magnetic field will be generated around the pole. When this magnetic field reaches a certain strength, it will discharge electrical equipment nearby. When the camera shell is connected with the metal pole, there is no equal potential difference, and the camera is safer.