Visual Inspection; Maintenance Tests - ABB REG670 Commissioning Manual

Section 15
Commissioning and maintenance of the fault clearing system
15.2.1
15.2.2
292
• Visual inspection of all equipment.
• Removal of dust on ventilation louvres and IEDs if necessary.
• Periodic maintenance test for protection IEDs of object where no redundant
protections are provided.
Every four to six years
• Periodic maintenance test for protection IEDs of objects with redundant protection
system.
First maintenance test should always be carried out after the first half
year of service.
When protection IEDs are combined with built-in control, the test
interval can be increased drastically, up to for instance 15 years,
because the IED continuously reads service values, operates the
breakers, and so on.

Visual inspection

Prior to testing, the protection IEDs should be inspected to detect any visible damage
that may have occurred (for example, dirt or moisture deposits, overheating).
Make sure that all IEDs are equipped with covers.

Maintenance tests

To be made after the first half year of service, then with the cycle as proposed above
and after any suspected maloperation or change of the IED setting.
Testing of protection IEDs shall preferably be made with the primary circuit de-
energized. The IED cannot protect the circuit during testing. Trained personnel may
test one IED at a time on live circuits where redundant protection is installed and de-
energization of the primary circuit is not allowed.
ABB protection IEDs are preferably tested by aid of components from the
COMBITEST testing system or FT test systems described in information B03-9510 E.
Main components are RTXP 8/18/24 test switch usually located to the left in each
protection IED and RTXH 8/18/24 test handle, which is inserted in test switch at
secondary testing. All necessary operations such as opening of trip circuits, short-
circuiting of current circuits and opening of voltage circuits are automatically
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
1MRK 502 073-UUS A
SEMOD56525-5 v3
SEMOD56534-1 v1
SEMOD56528-5 v5
Commissioning manual