ABB REG650 ANSI, Руководство по вводу в эксплуатацию

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Every second to third year
• 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.
7.1.2.1 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). Should
burned contacts be observed when inspecting the IEDs, a diamond file or an extremely
fine file can be used to polish the contacts. Emery cloth or similar products must not
be used as insulating grains of abrasive may be deposited on the contact surfaces and
cause failure.
Make sure that all IEDs are equipped with covers.
7.1.2.2 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 described in information B03-9510 E. Main
components are RTXP 8/18/24 test switch located to the left in each protection IED
and RTXH 8/18/24 test handle, which is inserted in test switch at secondary testing.
Section 7
1MRK 502 049-UEN A
Commissioning and maintenance of the fault clearing system
114
Commissioning manual