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5) Operation current I OP test
I OP , I RES as well as reset ratio test is carried out at U TEST set voltage and  CHAR angle by current variation
from I MIN to I MAX with ∆I current step.
6) Operating, reset and reorientation time test
The test is carries out at  CHAR by voltage stepwise variation for induction relays or voltage and current - for
static relays (i.e. by power variation). Reorientation time test is carried out in the same way, but the
voltage/current angle changes from  INI to  FIN.
7) Relay test at reverse power (S REV ) shedding
The test is carried out provided the relay is used in a directional stage operating without time delay. S REV
reverse power shedding value is set by the dispatching service as the max fault power “behind the back” (is
entered into the Settings and time window). The test is performed at voltage/current angle equal to  CHAR +180,
at specified current by power shedding from S INI to S FIN . The relay should not operate.
8) No contact vibration test
The test is carried out automatically at  CHAR (fault within operating area), at specified test current (as a rule
max fault current near bus). The power is changed from S INI to S FIN by voltage variation from U INI to U FIN with set
voltage step. Two switches-over of the relay contact mean vibration.
4.6.6 Test Protocol
The test results are registered in a protocol. The test protocol window and comments are shown in Figure
3.6.5.
Protocol preview
Protocol saving with
specified name as a file
Protocol printing out (see “Protocol printing out”
part). It is duplicated by Print item of the Menu
Protocol window
type view
Help Service activation duplicated by Help item of
the Menu
Exit the Protocol window
Copying selected protocol text
toPC buffer. It is duplicated by
Edit item of the Menu
Figure 3.6.5 – Test protocol window
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