It is impossible. Because the type is to detect by ZCT in an ungrounded system, the sensitivity becomes very high.

Overload tolerance of an over current relay is 200 A, 1 second. Adjust CT ratio and others not to input more than 200 A.

It operates with a settled operation time.

Set the display selection switch on the front upper right of the relay to “Time limit pass.” When a relay detects near t

It means multiples of the settling value. For example, when an instantaneous factor operation settling value of a relay

The prohibition position sets the maximum settling value. With the definite time current, all prohibition positions set

FAQ

FAQAbout Products

Font Size
S
M
L

FAQ > Medium-voltage Power Distribution Products > Protection Relays > Protection Relays - MELPRO-A Series

FAQ

Inquiries

Keyword Search

You can search two or more words separated by a space.

 AND : Put a space between the words in a keyphrase.
 OR  : Add a vertical bar ( | ) between the words in a keyphrase.
 NOT : Add a minus sign ( - ) followed by the words that you would like to exclude.

Result Type

Text Search

Protection Relays - MELPRO-A Series

COMMON(4)

FAQ within [ Protection Relays - MELPRO-A Series ]

31-36 of Total 36

prev 4 / 4page next

Scope of Application

It is impossible. Because the type is to detect by ZCT in an ungrounded system, the sensitivity becomes very high. More Details >>
- No：23727
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MGR
Short-circuit detection

Overload tolerance of an over current relay is 200 A, 1 second. Adjust CT ratio and others not to input more than 200 A. More Details >>
- No：23711
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MOC
Operating time of undervoltage detection

It operates with a settled operation time. More Details >>
- No：23731
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MUV
Confirmation method of the start-up value

Set the display selection switch on the front upper right of the relay to “Time limit pass.” When a relay detects near the operation value, “0” will be displ... More Details >>
- No：23716
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MOC
The viewpoint of the instantaneous factor operating characteristics graph

It means multiples of the settling value. For example, when an instantaneous factor operation settling value of a relay is 30 A, 100% is read as 30 A. More Details >>
- No：23707
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MOC
Position of switch

The prohibition position sets the maximum settling value. With the definite time current, all prohibition positions set 6 A, and with the instantaneous curre... More Details >>
- No：23714
- Release Date：2018/09/19 17:16
- Category： Protection Relays - MELPRO-A Series , MOC

31-36 of Total 36

Inquiries

page top