42
Technical catalog for Susol & Metasol ACB
Technical catalog for Susol & Metasol ACB
D
R S T N
Optional Relay - External CT Earth Leakage
1. Earth Leakage Relay with External CT
The necessity of earth leakage relay with external CT
Earth leakage relay with Internal CT (standard) operates in the range of 20% ~ 100% of the rated current.
Thus, if the rated current of ACB increases, the standard operating current of earth leakage relay also increases.
ex) 400AF ACB of Min. earth leakage relay current, 400A*20% = 80A
4000AF ACB of Min. earth leakage relay current, 4000A*20% = 800A
As shown from the example, the actuality of earth leakage relay drops when the rated current of ACB increases.
Thus, Susol ACB provides a solution with CT which can be installed externally to adjust sensibility of earth
Leakage current and which can operate relay. (separate purchase)
External CT Type Wiring 1
External CT
External CT
External CT Type Wiring 2
Secondary Rating: 5A
Secondary Rating: 5A
To Next Page
Loading...
Need help?
General
