Power Management Unit (PMU) is a fully automatic telecom BTS power solution, used in GSM Network, CDMA, Optical repeater networks etc. PMU replaces the existing conventional disintegrated power solutions in the telecom network, like Servo Stabilizer, Isolation Transformer, Relay based AMF panel, Generator control Unit and Counter, ACDB, Fire alarm, AC controller, Surge protection devices, Aviation timer etc.

The PMU consists of the following modules, integrated in the single cabinet and reduces the floor space as well as wall space in the telecom site. Also, the complexity of interconnecting all these modules is avoided.

MAJOR MODULES OF THE PMU

• Surge Protection Devices - SPD’s (Optional)
• Line Conditioner Unit (LCU)
• PMU Controller :-
• Automatic Mains Failure (AMF) functions.
• Monitoring various parameters of Mains and DG.
• Alarms & Potential free contacts for various faults
• Real time clock and event recording facility
• Fire Alarm Module
• Aviation Lamp Control
• AC Distribution unit
• Fire Alarm Module
• Aviation Lamp Controller
• DG Battery Charger
• Air Conditioner Controller
• Auto Phase selector
• Manual Phase selector
• Fuel Optimiser
• Energy Meter Box for the DG
• Display unit

KEY FEATURES

• Compact & Modular design – Easy replacement of sub-modules at site
• Minimum Generator utilization (Fuel savings and less DG wear and tear)
• Immense savings of space and Installation materials (Savings in Capex    and Opex)
• MTTR is as low as 15 minutes (Down time is less)
• MTBF is high due to usage of reliable components and non-movable    parts.
• Dedicated PMU controller with True RMS display of Voltage current and    frequency display, scrolling display , lamp indications, Alarm extension    features provided
• Automatic and Manual Modes of operation
• Battery voltage and shelter inside temperature monitoring feature to    switch on the DG set – Fuel saving
•  DG Battery and PMU battery voltage supervision
•  Performance, fault date storage features provided for easy    maintenance.
•  Inbuilt lightning and surge protection devises provided
•  Built-in circuit provided to monitor DG / PCM circuitry

PMU CONTROLLER

• Micro Processor based controller, working voltage 8 volts to 16 volts   DC  with battery back-up and auto changeover to BTS Battery facility   provided.
• AMF functions are incorporated
• Display Digital & LCD.
• Monitoring and metering Provided.
• Digital output (Relay Out) : Commonly required parameters.
• Digital Fault inputs : Commonly required parameters.
• Programmable parameters through Laptop - PC front panel keys.
• Event recording: 500 events, which can be converted to MS Excel for    diagnosis(optional)
• Parameter list with date and time stamping.
• Fault events with date and time stamping.
• DG start and stop event log with date and time stamping.
• RS 232 port provided for any change in setting through laptop (optional)