R
Hi guys,
Our machine make is GE Frame 9E. We have two 3-phase vent fan (88BT-1 & 88BT-2 and one 1-phase vent fan (88BT-3) for the turbine compartment. As far as i know, both 88BT-1 and 88BT2 start running (depending which is leading and lagging) when the turbine speed is above 14HY (8.4% ~ 252rpm)and stop when the setting of temperature switch 26BT-2 is achieved (35 degrees celcius). 26BT-1 will cause the "Turbine compartment temperature high" alarm to be annunciated whenever the temperature reaches 149 degrees celcius.
I would like to ask why do we need 88BT-3? Load compartment vent fans only come in pair, why do we need the 88BT-3?
Our machine make is GE Frame 9E. We have two 3-phase vent fan (88BT-1 & 88BT-2 and one 1-phase vent fan (88BT-3) for the turbine compartment. As far as i know, both 88BT-1 and 88BT2 start running (depending which is leading and lagging) when the turbine speed is above 14HY (8.4% ~ 252rpm)and stop when the setting of temperature switch 26BT-2 is achieved (35 degrees celcius). 26BT-1 will cause the "Turbine compartment temperature high" alarm to be annunciated whenever the temperature reaches 149 degrees celcius.
I would like to ask why do we need 88BT-3? Load compartment vent fans only come in pair, why do we need the 88BT-3?