The insulation is tested between phase-to-phase and phase-to-ground. Thebreaker is tested in the closed position because of the additional stress placed on the insulatorsdue to spring tension. “Megger” TestThe insulation of the circuit breaker is tested utilizing a 1000 volt megohmmeter (“Megger”). This test includes as much of the path as practicalfor each pole, ensuring that the entire pole (not just the contacts) has a low resistance. These reports include all pertinent information to ensure that you are receiving aproduct of the highest quality.Testing Procedures 'Ductor' TestThe Digital Low Resistance Ohmmeter (“Ductor”) uses dual spike probes to measure the resistance ofthe current carrying path of the entire phase. The rebuilt circuit breaker will be delivered to youwith a Job Packet containing an Initial Inspection Report, a Quality Control Checklist, and a FinalTest Report. Electrical devices and wiring harness are re-installed on the breaker and checked per factory or customer's wiring specifications.Upon completion of reassembly, the now completely remanufactured circuit breaker is retested andcertified by a quality control engineer. New retainer pins or clips are carefully installed and checked. Current-carrying parts are reassembled and torqued to the manufacturer's or NETA standards. Contact assemblies are adjusted to the manufacture's guidelines. Breakers are reassembledto the original factory specification as follows.įrame parts are reassembled and aligned. RESA Power follows a meticulous qualitycontrol procedure during reassembly to ensure years of trouble-free operation. Voltage and amperage ratings will always meet or exceed original specifications.Reassembly and Final TestingNow that the circuit breaker has been torn down with all of its components cleaned, refurbished orreplaced, it’s time to put it all back together. Toggle switches, motor cut-off switches and relays are cleaned or replaced with identical or equivalent devices. Control wiring is cleaned or replaced as necessary. (Nylon sleeve bearings do not require lubrication).Īll springs are either replated or replaced. Roller and needle bearings are lubricated. All standard hardware is replaced with new hardware.Īll pins are replated. Frame parts and mechanism parts are aluminum oxide blasted and then repainted or replated.
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Insulated parts and pole pieces are solvent cleaned to be free of silicone, oil, paint and moisture.
Plated parts showing signs of peeling are replated or replaced. Disassembly, Cleaning, and ReplacementAll of our remanufactured circuit breakers are dismantled down to the last moving part.Ĭonductive parts are bead blasted as needed and cleaned using a vibratory cleaner.
Noted items will be replaced later using equivalent or superior components. We’ll also note any springs showing signs of distortion, rust, brittleness, orimproper compression. (See “Testing Procedures” below for further description.)During our initial testing, we’ll take note of any wiring, taping, or heat shrinking that shows anysigns of deterioration. We’ll then perform a “Ductor” test, a “Megger” test, and severalother tests to determine our starting point.
We first want to check itsmechanical and electrical operation. Here’s how we will remanufacturethis Allis ChalmersLA-25A for you: Inspection and Initial TestingWe’ll start with an initial inspection and test of this Air Breaker. At RESA Power, we don’t just rebuild Air Breakers, we remanufacture them.Īll of ourremanufactured circuit breakers conform to NETA and ANSI C37 specifications, and all tolerances arechecked to meet or exceed the original manufacturer’s specifications. RESA Power shall not be liable to the customer, or to any otherperson, for consequential damages, lost profits or other kinds of damages arising out of the sale oruse of this circuit breaker. Anyrepairs performed without the express written permission of RESA Power Inc. RESA Power guarantees this breaker willoperate to your satisfaction given competent supervision and normal load and usage conditions. WarrantyRESA Power warranties this rebuiltAllis ChalmersLA-25A circuit breaker for one year, including all labor, freight and materialsrequired to return it to operational standards.
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