PW103MI1U161 Eaton / Control Automation, PW103MI1U161 Datasheet - Page 13

• Manufacturer Part Number: PW103MI1U161
• Description: UPS, EPDU MI L5-30 5-20 (12)
• Manufacturer: Eaton / Control Automation

Specifications of PW103MI1U161

• Dimensions: 1U × 19.0 × 7.0 In.
• Length, Cord: 9 ft.
• Mounting Type: Horizontal
• Number Of Outlets: (12) 5-20
• Power, Rating: 2.88 kW
• Special Features: MI

Monitored ePDU
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ePDU
Why Fuse? Circuit Breakers = Reliability
While there is little dispute that fuses can be substituted as over-current
protection devices in place of more expensive, and larger circuit breakers,
the purchaser of these power controllers must also consider the overall
protection reliability of the system design and the total cost of ownership.
Both devices will react to a current overload condition in approximately the
same time (around one-half of a 60 Hz A.C. cycle) and both can be specifi ed
with comparable over-current trip limits. Also, if properly designed, both
over-current protection devices will protect both local and upstream circuits.
Power distribution units conforming to UL60950-1 standards must use circuit
breakers or fuses rated as ‘Branch Circuit Protectors’ according to NEC or
UL listing. The appropriate circuit breaker type is a UL489 listed unit and the
appropriate fuse type is a UL248 listed JDDZ fuse classifi ed for branch circuit
protection.
• Circuit breakers, however, provide a wider variety of protection capability
• Circuit breakers are less susceptible to temperature variations and they
• Unlike fuses there are no replaceable elements in a circuit breaker, so
• Circuit breakers do not show signifi cant aging effects from repeated near
• Increases in temperatures forming localized hot spots in an
• Another important advantage of the circuit breaker is that it can be tested,
When making the choice between these two protective elements, the user
must be cognizant of these differences and the resulting total protection
reliability and cost of implementation.
and are available in a greater range of trip characteristics. Using the
confi gurability options of the electro-magnetic circuit breaker allows the
designer to include additional contacts which may be used to signal the
on, or off, state of the breaker, a capability not available with the fuse.
can also provide manual switching control
there is no need to keep extras on hand.
over-current events while a fuse when subjected to the same environment
may show a reduction in the fusible current limit.
equipment rack, or data center, can result in the fuse blowing below its
rated value. These hot spots do commonly occur in commercial and
industrial settings. In some instances, fuses can explode under extremely
high overload and when this happens, the resulting metallic vapor cloud
can become a conducting path. This can result in an aberrant circuit
path which could result in melted wiring or may spark a fi re.
and there is no way this can be done with a fuse. While you can test vast
quantities of similar fuses, all this will do is provide some assurance of
manufacturing quality and repeatability; it is no substitute for a test of
the actual protective limiting device in the power controller.
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Power Tip:
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