LJZ-65(75) zero-sequence current transformer at 35kV and below,AC50Hz line.Zero sequence as the high-voltage electric power system three-phase alternator,motor over-current protection.
|Electrical insulation strength||zero-sequence current transformer bus ,it‘s only necessary to examine the insulating properties of the secondary coil;|
|The two secondary coils||The sulation resistance between the two secondary coils of not less than 10 megohms.|
|The two secondary coils
||between the two secondary coils should be able to withstand power frequency test voltage of 3kV (rms)for 1minute|
|Protection sensitivity||The sensitivity of this zero-sequence current transformer shall meet the fllowing requirement|
|Coil terminal symbol of zero sequence current transformer connected to DD-11/60||DD-11/60 earthing relay||A zero sequence current|
|Coil connection||Scale value|
(a、x connect with acpacitor)
(a、x not connect with acpacitor)
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