Commissioning And Maintenance; Outline Of Commissioning Tests; Cautions; Hardware Tests - Toshiba GRE110 Instruction Manual

6.

Commissioning and Maintenance

6.1 Outline of Commissioning Tests

GRE110 is fully numerical and the hardware is continuously monitored.
Commissioning tests can be kept to a minimum and need only include hardware tests and
conjunctive tests. The function tests are at the user's discretion.
In these tests, user interfaces on the front panel of the relay or local PC can be fully applied.
Test personnel must be familiar with general relay testing practices and safety precautions to avoid
personal injuries or equipment damage.

Hardware tests

These tests are performed for the following hardware to ensure that there is no hardware defect.
Defects of hardware circuits other than the following can be detected by monitoring which circuits
function when the power is supplied.
User interfaces
Binary input circuits and output circuits
AC input circuits
Function tests
These tests are performed for the following functions that are fully software-based.
Measuring elements
Metering and recording
Conjunctive tests
The tests are performed after the relay is connected with the primary equipment and other external
equipment.
The following tests are included:
On load test: phase sequence check and polarity check
Tripping circuit test

6.2 Cautions

6.2.1 Safety Precautions
CAUTION
• When connecting the cable to the back of the relay, firmly fix it to the terminal block and attach
the cover provided on top of it.
• Before remove the terminal block or cable of the relay, be sure to turn off the power.
Failure to observe any of the precautions above may cause electric shock or malfunction.
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