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ACB Tripping settings

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ACB tripping settings   Acb has 6 adjustable tripping settings 1 Long time delay (Tr ) 2 Short time delay( Tsd ) 3 Earth fault delay (Tg) 4 Long time (Ir) 5 Short time (Isd) 6 Earth Fault (Ig) Long time is for maximum overload capacity . Short time is for short circuit current Earth fault is for earth fault current . As per thumb Rule : 1. Long time set at 0.8 means 80% of full load current .Until this level of current  breaker carry without tripping  . Above 0.8 Acb trips. Long time delay causes the breaker to wait for certain time to allow heavy temporary inrush currents to pass away. Generally long time delay is set at  4 Sec. 2. Short time set at 0.6 means  60% of full load current . It determines the Amount of Current the Breaker will carry for short time period.  Generally short time delay set at 0.2 sec. 3. Earth Fault set at 0.3 or 30% of  fault current . It controls the amount of Ground Fault current that will caus...
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Transformer Magnetic Oil Gauge Indicator

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conservator tank oil level (Mog) The MOG  (Magnetic Oil Gauge)  is a device by which we can supervise the level of oil inside the tank or conservator of power transformer and also gives us an alert low oil level indication .  A decrease in level of Transformer oil in Conservator is an indication of leak and therefore MOG level is an important parameter to be monitored. Practically under running condition oil level remains at 3/4 th level.
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DG Preventive Maintenance Checklist

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DG CHECKS: A CHECK (Daily/ Weekly) : Check Engine oil Level in DG set. Radiator coolant level. Check Diesel Day tank level. Check Battery voltage, Distilled water level . Check all Air Filters, Breathers, water Separator condition check V belt Condition. check Cleanliness of DG. B CHECK (Every 300 hrs or Every 6 Months) : Change Engine oil. Change Oil filters, Fuel Filters, Bypass Filters. Change Air filters, Water separator. Radiator Cleaning with Chemical . Clean the Dg set. C CHECK (Every 1500 hrs or Every 1 Year) : Repeat A & B check . Check all Electrical Equipment Condition Check Pollution Level. Change Water Separator  Replace Breathers. Inspect Alternator Starter . Change All Filters. D CHECK (Every 6000 hrs or Every 2 Year) : Repeat A & B check . Clean & Calibrate Fuel Injectors If Required. Turbocharger Service. Cylinder Head service. Check Fuel Pump Calibration. Change Coolant , Descale ...
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