. Electric railway journal . Fig. 7—Detroit Tunnel—Booster Set When a total of 59 plates is installed in the tanks each••lement will have a capacity of 870 amp for 8 hours. 1740 ampfor 3 hours, 3480 amp for I hour, or 6960 amp for 20 minutes,and will be capable of withstanding discharges up to 11,000 amp. The battery installation is for the purpose of removing thefluctuations from the load and insuring a practically constantinput from the Detroit Edison Company. It consists of thebatterv, a motor-driven booster, an exciter set for the booster Fig. 8—Detroit Tunnel—Rectifier or Permutator Sets
. Electric railway journal . Fig. 7—Detroit Tunnel—Booster Set When a total of 59 plates is installed in the tanks each••lement will have a capacity of 870 amp for 8 hours. 1740 ampfor 3 hours, 3480 amp for I hour, or 6960 amp for 20 minutes,and will be capable of withstanding discharges up to 11,000 amp. The battery installation is for the purpose of removing thefluctuations from the load and insuring a practically constantinput from the Detroit Edison Company. It consists of thebatterv, a motor-driven booster, an exciter set for the booster Fig. 8—Detroit Tunnel—Rectifier or Permutator Sets limit device is actuated by battery discharge current and battencharge current, and by booster voltage in a charge directionand in a discharge direction. When the battery is dischargingand this load-limit device is actuated, additional load is thrownon the motor-generator sets, and when the battery is chargingand the load-limit device is actuated the load is removed fromthe motor-generator sets, but this device,
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