ABB RELION REX640 Technical Manual page 878

Protection and control

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Protection functions

An appropriate value for the setting parameter

3 percent of U

depends on the application. If the NSPTOV operation is used as backup protection,

the operate time should be set in accordance with the operate time of NSPTOC used

as main protection. If the NSPTOV operation is used as main protection, the operate

time should be approximately one second.

NSPTOV Input signals

Table 823: NSPTOV Input signals

NSPTOV Output signals

Table 824: NSPTOV Output signals

NSPTOV Settings

Table 825: NSPTOV Group settings (Basic)

Values (Range)

0.010...1.000

Operate delay time

Table 826: NSPTOV Non group settings (Basic)

Values (Range)

Table 827: NSPTOV Non group settings (Advanced)

Values (Range)

Reset delay time

. A suitable value for the setting parameter

Voltage start value is approximately

Operate delay time

Three-phase voltages

Block signal for acti-

vating the blocking

1MRS759142 F

Operate delay time

Operation Off / On

Reset delay time

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