AC PDUs Supported on the PTX5000PTX5000 Normal Capacity Delta and Wye AC PDUsPTX5000 High Capacity Delta and Wye AC PDUPTX5000 High Capacity Single-Phase AC PDUHigh Capacity Single-Phase AC PDU ComponentsAC PSMs Supported on the PTX5000PTX5000 Normal Capacity AC PSMPTX5000 High Capacity AC PSMThe PTX5000 supports the AC PDUs in Table 1.Note: Ensure that you use AC PDUs of the same model number duringTable 1: AC PDUs Supported on the PTX5000NameModel NumberFirst Supported Junos OS ReleaseDelta AC PDUPDU-PTX-AC-D12.3Wye AC PDUPDU-PTX-AC-W12.3High Capacity Delta AC PDUPDU2-PTX-AC-D14.2High Capacity Wye AC PDUPDU2-PTX-AC-W14.2High Capacity Single-Phase AC PDUPDU2-PTX-AC-SP15.1F3, 16.1Each normal-capacity three-phase delta AC PDU has the following components (see Figure 1):A metal retaining bracket located on the lower right to connect the delta AC power cord to the PDU.A metal wiring compartment that contains the AC input terminal block and ground. The AC terminal block consists of three

input terminals labeled , , and .One 60-A circuit breakerA power switch that provides power to the PSMs.LEDs to monitor the status of the PDU. Twenty-one monitored electronic fuses for the fan trays,how ac units are made Control Boards, and FPCs.Note:how to service your ac unit There are no mechanical fuses in the PDU to be replaced. automotive ac repair tips output voltage, current protection is provided by electronic fuses, hot-swap circuits, or ORing circuit. Electronic fuses and hot-swap circuits also provide current limitation. The PDUs contain no fans, but are cooled by the fans in theFigure 1: Three-Phase Delta AC PDU  1  5  2  6  3  7  4  8Each three-phase delta AC PDU weighs approximately 51.2 lb (23.2 kg).

Figure 2 shows the three-phase delta AC power cord. Figure 2: Three-Phase Delta AC Power Cord  1  2Each normal-capacity three-phase wye AC PDU has the following components (Figure 3):A metal bracket located on the lower right to connect the wye AC power cord to the PDU. input terminals labeled , , and , from left to right. is labeled N.One 32-A circuit breaker.A power switch provides power to the PSMs.LEDs to monitor the status of the PDU.Figure 3: Three-Phase Wye AC PDU  1  5  2  6  3  7  4  8Each three-phase wye AC PDU weighs approximately 51.2 lb (23.2 kg). Figure 4 shows the three-phase wye AC power cord. Figure 4: Three-Phase Wye AC Power Cord  1  2The High Capacity AC Delta and Wye AC PDUs support the following features:Each High Capacity Delta AC PDU has the following componentsFigure 5: High Capacity Delta AC PDU  1  6  2  7  3  8  4Power switch labeled (|) for the on position and () for the standby position.  

9  510Each High Capacity Delta AC PDU weighs approximately 63.3 lb (28.7 kg). Figure 6 shows the ACThe High Capacity Delta AC PDU supports three power cords for 60 A, 100 A, and 150 A. See Connecting Power to the PTX5000 High Capacity Delta AC PDUs for setting the power cord selection switch.Figure 6: AC Power Cord  1  2Each High Capacity Wye AC PDU has the following components (Figure 7):Note:Figure 7: High Capacity Wye AC PDU  1  6  2  7  3  8  4Power switch labeled (|) for the on position9  510Each High Capacity Wye AC PDU weighs approximately 63.3 lb (28.7 kg). Figure 8 shows the power cord for the High Capacity Wye AC PDU. Figure 8: AC Power Cord  1  2The High Capacity Single-Phase AC PDU supports the following features:Figure 9: High Capacity Single-PhaseAC PDU Components  1  3  2  4Each High Capacity Single-Phase AC PDU has the following components(Figure 9):The PTX5000 supports the AC power supply modules (PSMs) listed

Ensure that you use AC PSMs of the same model number duringTable 2: AC PSMs Supported on the PTX5000NameModel NumberFirst Supported Junos OS ReleaseAC PSMPSM-PTX-AC12.3High Capacity AC PSMPSM2-PTX-AC14.2Figure 10 shows the AC PSM. The AC PSMs and DC PSMs are not interchangeable. must be installed in the three-phase delta AC PDU or three-phase wyeThe High Capacity AC PSM must be installed in the High Capacity Delta AC PDU or High Capacity Wye AC PDU or High Capacity Single-PhaseTo avoid damaging the connectors on the back of the PSM or inside the PDU, use caution to ensure that you have an AC PSM before installing it in any high-capacity AC PDU. Figure 11 shows the High CapacityThese PSMs are smaller than the normal-capacity PSMs, allowing up to eight PSMs to be installed per PDU, and up to 16 PSMs per chassis. Under light load condition, the High Capacity AC PSMs do not support load balancing and might show very low or zero output current.

Light load condition occurs when the average input power to the PSMs is less than 422 W.Figure 11: High Capacity AC PSMRelated DocumentationPTX SeriesPTX5000 Hardware Component OverviewUnderstanding Normal-Capacity Power System Power ZonesTuesday, July 21, 2015 When it comes to enjoying all your RV has to offer, you need to be aware of problems that can occur. Some of these problems can make for a really bad day, and RV battery issues fall into this category. With a little basic understanding, you will be able to maintain the health of your RV's 12-volt DC system and remain a happy camper. My wife Pam and I have been traveling the country in an RV for 15 years and have enjoyed full-time RV living for seven of those years. We have learned a lot of things the hard way, and some things by the mistakes of others. As we travel and talk to other RVers, we find this topic is quite difficult to grasp. There appears to be a lack of understanding of how an RV's electrical system works.

And the RV battery is a big part of the electrical systems in an RV. Your RV has three electrical systems. First, you have a 120-volt AC (alternating current) electrical system known as your shore power. This becomes active when you plug your RV into either a 50-, 30- or 20-amp power source. This electrical system will control the power needs of your major appliances and allow for charging of one or more battery systems. And, on some RVs, you can create this electrical power source from an external or onboard generator. Please be aware of the amperage requirements of your RV when choosing a shore power source. The second RV electrical system is the chassis 12-volt DC (direct current) system provided by an auto battery. This controls your tail lights, marker lights, brake lights, electric wheel brakes, engine starter motor and dash accessories. It does not matter whether the RV is a towable or a motorized unit, it still has this electrical system. It just may not be attached to the RV all the time.

The third — and most important — electrical system in the RV is the 12-volt DC house batteries. This system is powered by either a six- or 12-volt DC deep-cycle battery combination. They are hooked together in either a parallel or series combination to create a strong 12-volt DC source. Now, here is where the confusion sometimes occurs. Most things inside your RV will not work without a properly functioning 12-volt DC house battery system. And this is where RV battery issues can be created because of a lack of understanding of how this system works, and its interaction with the 120-volt AC system. Stick with me here. I may be able to save you from a potential problem. In order for your 12-volt DC house battery system to function, you need good batteries as well as a way to charge them. That is where your RV's power converter is used. When plugged into shore power, this device is converting 120-volt AC power into 12-volt DC power. Think of the converter as the main 12-volt DC power system along with the house batteries, and that these batteries actually function as your backup, or the piggy bank if you will.

If the piggy bank is nearing empty, then the power converter will have a hard time keeping up with the demand when many 12-volt DC systems are being used. This is when things will not work properly. When disconnected from shore power, you can run your lights, your water pump, your gas furnace and even some electrical devices if you have an inverter. This device takes your 12-volt DC power and converts it to 120 volts of AC power. But during use, the piggy bank will empty quickly without being recharged by the power converter. You need both a properly functioning set of batteries and a working power converter. Do you know where your power converter is? Do you need to in order to be sure it is doing its job? Do you need to know where the house batteries are located? One of the main causes of RV battery issues is the lack of a proper maintenance schedule for them. They require water in order for the chemical reaction to occur in creating DC voltage. If water is not checked and added on a regular basis, the RV's house batteries will deteriorate and not allow many of the needed systems to function in the RV.

Have you ever been inside your RV and the 120-volt AC power went out? Perhaps you had your lights on and noticed just as the power went out the lights also dimmed. This could be an indication of either a power converter problem or weakened batteries due to age or neglect. Without a properly working 12-volt DC house battery power source, RV interior lights will not work, the water pump will not function, the appliance control boards will not have the power they need to allow the gas/electric refrigerator to work, the air conditioning units to cool, the furnace to provide heat and the slide outs and leveling systems to function. Even if the RV is plugged into a 120-volt AC source, those items will not work if there is a problem with the RV's 12-volt DC house battery system. Do you know where all your 12-volt fuses are located? What can you do now to keep your lights on and appliances operating? Please, check your batteries regularly. Be sure they are at the proper water level.

Some of these batteries are difficult to reach, but take the time to check them and fill as needed with distilled water. Also, clean any corrosion you see developing on the battery terminals. This will add extra resistance to the system that you do not want to have. If you know how to use a voltage meter, you can also check the house battery voltage with your RV disconnected from an AC electrical source. Compare that to a battery voltage reading with the power back on and the power converter operating. This test can reveal a lot of information about the health of your RV's 12-volt DC house battery system. In summary, check your RV batteries regularly to avoid any issues. If you use your RV all the time, make it part of a regular maintenance program, and check them once per month. If you notice care is needed more frequently, do so. If you only use your RV occasionally, then you must be sure your RV batteries remain charged, the battery water levels are adequate and they are clean.