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Index

Protection Function

1

Instantaneous protection(with compound voltage )

2

Definite-time over-current limit protection (with compound voltage), inverse time over-current protection

3

Overload protection

4

Definite-time limit negative sequence over-current protection, inverse time limit negative sequence over-current protection

5

Zero sequence over-current protection for High-voltage side

6

Definite-time zero sequence over-current protection for Low-voltage side，inverse time zero sequence over-current protection for Low-voltage side

7

Low voltage protection ( under-voltage protection)

8

Three-phase fused alarm, Three-phase fused locked protection

9

Body protection (non-electric protection)

10

PT Break Judgment

Index

Electrical parameters

Accuracy

1

secondary & primary protection current value (Ia1、Ic1)

1%

2

secondary & primary measure voltage value（Uab、Ubc）

1%

3

frequency（F）

0.02Hz

4

power（P、Q）secondary & primary value；power factor（COS￠）

1%

Index

Item

Remarks

1

breaker control

remote control or through the menu operation

2

Relay for output

The device provides 5 output relays used to control the output and signaling functions.