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Index

Protection Function

1

Bus-charging protection(for bus-connector protection）

2

Instantaneous protection(with compound voltage and direction locking )

3

Time limit instantaneous protection (with compound voltage and direction locking )

4

Definite-time over-current protection (with compound voltage and direction locking ), inverse time over-current protection

5

Overload protection

6

Zero sequence over-current protection

7

Zero sequence overvoltage alarm

8

Low voltage protection ( under-voltage protection)

9

Under-frequency protection

10

Three phase once reclosing

11

Post-acceleration（instantaneous acceleration、Limit-time instantaneous acceleration、over-current acceleration、zero sequence over-current acceleration）

12

PT Break Judgment

Index

Electrical parameters

Accuracy

1

secondary & primary protection current value

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￠）

3%

Index

Item

Remarks

1

breaker control

through the menu operation

2

Relay for trip

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