The purpose of maintenance is to keep equipment operational and in good working conditions and to increase its useful life. Identifying and fixing malfunctions in a timely fashion makes it possible to avoid more serious failures and, subsequently, costly repair.
DELTER GROUP maintenance and service department performs maintenance jobs on the following electrical equipment:
- JOVYATLAS, General Electric, AEG, Chloride, Riello, AROS, and Liebert uninterruptible power supply units;
- JOVYATLAS inverters;
- JOVYATLAS rectifiers;
- GESAN, FERBO, FG Wilson, Cummins, NeuHaus, SAKR, Green Power, and MBH diesel electrical power plants (diesel driven generators).
Job list attendant to maintenance servicing of UPS:
- UPS display check;
- analysis of the “queue” of events and alarms kept in the UPS memory;
- switching the UPS to the “bypass” mode of operation;
- visual inspection of the UPS units, cleaning dirt from the UPS units;
- checking the condition of electrical conductors and connections;
- checking the condition and operating capability of UPS power elements;
- checking the condition and operating capability of cooling fans;
- check and adjustment of UPS internal assemblies and all operation parameters;
- check of operating capability of UPS internal diagnostics system;
- check of UPS electrical parameters test values;
- visual inspection of storage batteries for absence of electrolyte leaks, expansions, and oxidized contacts;
- test of voltage values of each battery or group of batteries;
- check of UPS functioning in various operational modes;
- drawing up reports as to UPS operation condition and recommendations for further operation
Job list attendant to maintenance servicing of DDGs:
Alternating current generator:
- reliability check of the power cord hookup to the generator and the automatic throw-over circuit breaker panel;
- generator windings insulation resistance check;
- DDG grounding check;
- alternating current generator automatic circuit breaker check.
Control system:
- reliability check of the control cable hookup to the control panel and panel board;
- check of the electrical components and connections of the engine control system;
- check of DDG operation in idle mode and under load;
- check of alternating current generator output voltage;
- engine crankshaft RPM check;
- cooling fluid heating unit check;
- DDG automatic devices check in manual and automatic operation modes.
Lubrication system:
- oil change;
- oil filter (filters) change;
- fan housing check;
- oil lubrication system leak check.
Cooling system:
- antifreeze level and concentration check;
- engine cooling system leak integrity check;
- fan belt check.
Intake and exhaust system:
- check of air filter for dirt and its replacement if necessary;
- air induction system check.
Fuel system:
- replacement of fuel filters;
- fuel system leak integrity check.
Electrical power supply system:
- battery electrolyte level and density check;
- check of battery cable and contacts and of the starter;
- battery static charger operation check;
- generator drive belt tension check.
