The document discusses an overview of a power interface unit (PIU). It describes the PIU as providing optimized power from electricity boards and diesel generators to telecom infrastructure equipment ranging from 5-40 KVA. The PIU intelligently controls air conditioners using mains power and conserves diesel generator use when mains power is absent. Key features of the PIU include protections against surges and lightning, intelligent phase selection, a wide input voltage range, independent circuit breakers for power distribution, support for 1-3 LCUs, a user-friendly display, status LEDs, and logs for the diesel generator and events.

1. Overview of Power Interface Unit

2. Structure of Content
The module is divided into 3 categories.
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About
Component
About
Inspection
Checklist
Details

3. Power Interface Unit
In this module you will study about
• Functions of PIU
• Applications
• Visual Representation
• Block Diagram
• Problem if component fails
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POWER INTERFACE UNIT
Power Interface Units to provide optimum power to Telecom infra equipments. Systems ranging
from 5 KVA to 40 KVA rating are used to interface power from electricity boards and diesel
generators to provide an optimum solution meeting the stringent requirements within a
Telecom Shelter. The equipment intelligently controls running of Air Conditioners while Mains
Power is available and conserves running of costly diesel generator in the absence of
commercial electric power.
Salient Features :
•Protection against lightening and voltage surges
•Intelligent phase selection.
•Wide input voltage range
•Large number of independent MCB’s for power distribution.
•Provision of 1/2/3 LCU’s.
•User friendly controller display.
•LED’s to display status and critical alarms.
•Provision of DG and event logs.
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5. PIU-Function
PIU(Power Interface Unit) convert 3 phase ac power supply in
230 volt ac with stabilized and no surge and interference
effect. piu mostly used in telecom sector for providing ac
supply to all equipment used in shelter and also control dg
and consist a lot of protection and showing alarm indication
and record events upto 500.
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6. PIU-Application
• Used for stablized power to
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7. Why to do Inspection
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