Siemens SIPROTEC 7SJ62 Instruction Manual

Routine Checks and Maintenance
9-37SJ62 Manual
C53000-G1140-C121-1
9.2 Routine Checks
Routine checks of the characteristic curves or pickup values of the protective elements
are not necessary because they form part of the continuously supervised firmware
programs. The normally scheduled interval for substation maintenance can be used
for carrying out operational testing of the protective and control equipment. The main-
tenance serves mainly to check the serial or hardwired interfaces of the device, i.e. the
connections to remote equipment.
The steps listed below are recommended for routine checks. If a problem is detected
during these checks, refer to Section 9.4.
o Verify that the green “RUN” LED is lit on the front panel and the red “ERROR” LED is
not.
o Check that the states of the LEDs on the front panel give an accurate image of the
conditions of the device and station. Investigate any problems or uncertainties.
o Press the key. All of the LEDs should temporarily light except for the “ERROR”
LED. Only the LEDs indicating specific present conditions should remain lit.
o Read the measurement values and compare them to an independent source to check
the measuring circuits of the 7SJ62. Refer to Sub-section 7.1.3 for assistance in read-
ing the measurement values.
o Review the messages given under the $QQXQFLDWLRQ sub-menu. Be sure there are
no reports of unknown problems or abnormal occurrences related to the device, the
measuring circuits, or the power system. All information should be plausible. See Sub-
section 7.1.1.2 for help in reading the messages.
o Perform a reset (reboot) of the device. A complete check of the hardware is done. The
device is effectively out of service during the reset, which lasts for about 10 to 15 sec-
onds. To perform the reset from the operator control panel, press the key and use
the and keys to select the 'HYLFH5HVHW under the 7(67',$*126( sub-
menu. Press the key, enter Password No. 4 for test and diagnostics, and answer
with <HV. During the reset, the “ERROR” and “RUN” LEDs are lit, the other LEDs flash,
and the display becomes blank. After a successful reset, the default display reappears
and the LEDs return to indicate normal operation. The device is then back in-service.
To perform the reset with DIGSI
®
4, establish the 2QOLQH mode, select 'HYLFH in the
menu bar, and then 5
HVHW Enter the password for test and diagnostics; then 2..
o Other testing can be done with DIGSI
®
4 on-line. In +DUGZDUH7HVW under 7HVW, the
conditions of all of the binary inputs, binary outputs, and LEDs can be monitored. Com-
pare the indicated conditions with the actual conditions. Do not change the states of
the device components because the station is immediately affected!
o The trip and close circuits for circuit breakers and other primary equipment can be ver-
ified with operator control actions. Other circuits can be checked as well. Refer to Sub-
section 7.3.1 for details about system control.
Warning!
Changing of the states of the binary inputs, binary outputs, and LEDs must not be
done with test features during normal operation. Any such change immediately affects
the inputs and outputs of the device, and therefore the connected switching devices!
This includes, for instance, non-interlocked primary switching!
LED
MENU
ENTER
www . ElectricalPartManuals . com

Siemens SIPROTEC 7SJ62 Specifications

General

Brand	Siemens
Model	SIPROTEC 7SJ62
Category	Relays
Language	English