1. What should I do if I can't find the paper manual in the product packaging?
Watchful Eye products is committed to going green with paperless data sheets. On the side of each product enclosure is an engraved link with URL for downloading paperless data sheet and QR code of the website. If you need the paper data sheet, you can open the link and print the data sheet by yourself.
2. Model WTH-SG/TER has no LED status indicator. What instruments can be used to test whether its surge protection function is normal or not?
Test with a Watchful Eye surge protector tester.
If a system failure occurs, first remove the surge protector and restore the system to the wiring status without the surge protector. If the system failure is solved, it shows the surge protector is faulty. Using Watchful Eye Surge Protective Tester can more easily test whether the WTH-SG/TER series is normal or not.
3. Can you list more applications of WTH-SG/TER series?
4-20mA industrial control system, 0-5V industrial monitoring system, RS485 system, industrial monitoring probe, video camera control PTZ, etc.
4. What are the advantages of the GDT+TVS type surge protection?
It provides a two-step surge protection mode: the first-stage GDT protection, releasing strong surge intrusion and reduce the strength of the surge; it is followed up the second-stage TVS fine protection, achieving a lower residual voltage value.
5. If the wires on the line side and the equipment side are connected reversely, will it affect surge protection?
When the wire is connected reversely, TVS becomes pre-stage protection, and GDT is post-stage protection. The nominal discharge current of TVS protection will be much lower than GDT. If it encounters a surge intrusion, it may cause damage to the TVS. The second-stage GDT protection will also play a role in surge protection, but the residual voltage value will increase, which is a risk to the protected equipment.
6. Is there any requirement on the wiring order of the line 1 and line 2 of control signal cable?
Line 1 and Line 2 can be interchangeable wired
7. Characteristics of wide voltage, rated working voltage (Un): What are the advantages of 3-18VAC and 5-24VDC?
If you don’t know what kind of industrial control voltage system the system is, it is commonly used in systems below 24VDC, such as: RS485, 4-20mA, 0-5V, etc., to avoid confusion about your selection.
8. What are the advantages of the model of line-PE/GND parallel GDT+TVS?
Line-line and line-ground are in both complete GDT+TVS mode, while line-line has the lowest residual voltage (UP) value, line-PE/GND also obtains the lowest residual voltage (UP) value.
