ABB REC650 Commissioning Manual

Also see for REC650 ANSI: Technical manual Manual Applications manual Product guide Applications manual

Contents

ABB REC650 Commissioning Manual Manual pdf 97 page image

• 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 redundantprotections are provided.Every four to six years• Periodic maintenance test for protection IEDs of objects with redundantprotection system.First maintenance test should always be carried out after the firsthalf year of service.When protection IEDs are combined with built-in control, the testinterval can be increased drastically, up to for instance 15 years,because the IED continuously reads service values, operates thebreakers, and so on.7.1.3.1 Visual inspectionPrior to testing, the protection IEDs should be inspected to detect any visibledamage that may have occurred (for example, dirt or moisture deposits,overheating). Should burned contacts be observed when inspecting the IEDs, adiamond file or an extremely fine file can be used to polish the contacts. Emerycloth or similar products must not be used as insulating grains of abrasive may bedeposited on the contact surfaces and cause failure.Make sure that all IEDs are equipped with covers.7.1.3.2 Maintenance testsTo be made after the first half year of service, then with the cycle as proposedabove 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 personnelmay test one IED at a time on live circuits where redundant protection is installedand de-energization of the primary circuit is not allowed.ABB protection IEDs are preferably tested by aid of components from theCOMBITEST testing system described in information B03-9510 E. Maincomponents are RTXP 8/18/24 test switch located to the left in each protection IEDand RTXH 8/18/24 test handle, which is inserted in test switch at secondarytesting. All necessary operations such as opening of trip circuits, short-circuiting ofcurrent circuits and opening of voltage circuits are automatically performed in the1MRK 511 248-UEN - Section 7Commissioning and maintenance of the fault clearing system89Commissioning Manual