FAQ
![](/usr/file/attachment/q&a.jpg)
![](/usr/file/attachment/q&a_sp.jpg)
FAQAbout Products
![](/usr/file/attachment/img_mv-1_sm.jpg)
- FAQ > Medium-voltage Power Distribution Products > Protection Relays
FAQ
Keyword Search
FAQ within [ Protection Relays ]
-
That is described as below. (1) By laying ZCTs for two feeders having different loads, detected by one earth fault directional relay. In this case, it i... More Details >>
- No:23724
- Release Date:2018/09/19 17:16
- Update:2018/09/20 14:23
- Category: Protection Relays - MELPRO-A Series , MDG
-
It recovers without retaining. More Details >>
- No:23723
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MDG
-
It is required that the resistance is lower than 5 ohm for a go and return length using sealed cables. Other than MPD-3 type ZVT, it is similar to the distan... More Details >>
- No:23719
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MDG
-
It is required that the resistance is lower than 5 ohm for a go and return length using sealed cables. The high voltage receiving facility rule defines “The ... More Details >>
- No:23720
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MDG
-
That is right. More Details >>
- No:23722
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MDG
-
It operates. More Details >>
- No:23739
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , COMMON
-
It operates on a root mean square value of a fundamental wave. More Details >>
- No:23710
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MOC
-
Combination with other companies' peripheral devices
It is impossible. In Standard JIS C 4609, warranty is covered for combination of peripheral devices and relays. Therefore, combination with other companies’ ... More Details >>
- No:23718
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , MDG
-
Because between memories, a value becomes unstable, reset the position to the correct position. More Details >>
- No:23738
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , COMMON
-
Set the frequency to meet the frequency of the region. Incorrect frequency prevents correct detection. More Details >>
- No:23740
- Release Date:2018/09/19 17:16
- Category: Protection Relays - MELPRO-A Series , COMMON
1-10 of Total 36