T640 Three-Phase Delta and Wye AC Power Supply Description

Three-Phase Delta AC Power Supply

Each three-phase delta AC power supply weighs approximately 31.0 lb (14.06 kg). A metal wiring compartment contains the AC terminal block and ground labeled GND. The AC terminal block consists of three input terminals labeled L1, L2, and L3, from left to right. The power switch provides power to the router. Each power supply’s cooling system consists of two fans, a front air filter, and a side air filter. LEDs provide the status of the power supply. Figure 1 shows the three-phase delta AC power supply.

Figure 1: Three-Phase Delta AC Power Supply

Figure 2 shows the three-phase delta AC power supply connections.

Figure 2: Three-Phase Delta AC Power Supply Connections

Figure 3 shows the three-phase delta AC power cord.

Figure 3: Three-Phase Delta AC Power Cord

Three-Phase Wye AC Power Supply

Each three-phase wye AC power supply weighs approximately 31.0 lb (14.06 kg). A metal wiring compartment contains the AC terminal block and ground labeled GND. The AC terminal block consists of four input terminals labeled L1, L2, L3, and N, from left to right. The power switch provides power to the router. Each power supply’s cooling system consists of two fans, a front air filter, and a side air filter. LEDs provide the status of the power supply. Figure 4 shows the three-phase wye AC power supply.

Figure 4: Three-Phase Wye AC Power Supply

Figure 5 shows the three-phase wye AC power supply connections.

Figure 5: Three-Phase Wye AC Power Supply Connections

Figure 6 shows the three-phase wye AC power cord.

Figure 6: Wye Three-Phase AC Power Cord

AC Power Supply Load Sharing and Fault Tolerance

When the router is operating normally and both power supplies are switched on, load sharing between them occurs automatically. When one power supply fails or is turned off, the other power supply immediately assumes the entire electrical load for the system. A single power supply can provide full power for as long as the router is operational.