Basic Requirements for Maintenance.

          Power supply is the heart of communication system. To ensure high quality power supply and guarantee stable and reliable operation of the communication system, it is absolutely necessary to conduct operational management and maintenance to the power equipment. Basic requirements for maintenance of power equipment include:

1) Ensure uninterrupted power supply for telecom equipment and guarantee the power quality is up  to standard.
2) Through frequent maintenance, inspection and regular overhaul, ensure stable and reliable operation of the power supply and prolong its span.
3) Remove faults promptly and accurately to reduce the damages caused by faults.
4) Keep the equipment and the ambient environment clean to ensure that the equipment room environment meets the basic requirements for equipment operation.
5) Adopt new technologies and improve maintenance methods to gradually achieve centralized monitoring and few or even no attendance.

            In sum, maintenance of power equipment includes three aspects: Routine maintenance, Regular inspection and technological reform. Equipment maintenance is to be conducted in compliance with professional specifications and local regulations.

Common tools for power equipment maintenance

Joint pliers:- Shape and coil the naked pins of device and help to avoid and assemble the surface of intensive device.
Diagonal cutting pliers:- Cut extra leads, pins of welding surface and nylon binding clips.
Tweezers:-r Help to weld and clean, pick up mini components and coil tiny leads
Blade screwdriver:-  Drive and remove plain screws and open boxes
Cross screwdriver:- Drive and remove cross screws
Wrench (double end wrench or fork wrench):- Wrench 6 angle or 4 angle bolts and nuts.
Socket wrench:- A kind of spinning tool used when there is no space for operation on the screw surface
Electric soldering iron:- Weld components
Blacking brush:- Clean the equipment and dust inside boxes
Handsaw:- Saw the bus and cables
Electrician knife:- Peel off the skin of cables, etc.
Electrician rubber mallet:- Rectify cables or equipment location


Main instruments for power equipment maintenance

Multimeter:- Measures AC/DC voltage, current and resistance
Earth resistance tester:- Measures the earth resistance
Megommeter (500v and 1000v withstand voltage):- Test withstand voltage
AC/DC tong ammeter:-  Measures current
Semiconductor Thermometer:- Measures the temperature of the surface and junction points of equipment.
Oscilograph:- Observe the voltage and current wave form and test the peak to peak noise value
High/low-frequency noise tester:- Measures noise
Ampere hour meter:- Examine the phase order of the generator and power net
AC/DC load meter:- Measures and test the load capacity of power net,

Rectifier and Batteries

              The power supply system consists of AC & DC power supply and earth system. To ensure communication quality and power supply security, the power supply quality must conform to some basic quality standards.

Quality standards for DC power supply

Note:- The voltage drop at the connectors of DC power supply circuit (including the fuse of the feed line out put form the discharging busbar, battery connectors) shall be in conformity with the following requirements or the temperature rise shall not exceed the permissible value.

(1) If under 1000 A, every hundred ampere ≤ 5 mv,

(2) If above 1000 A, every hundred ampere ≤ 3mv.

Quality standards for AC power supply

Earth resistance reference standards for communication standards

ABBREVIATIONS

    Optical Fiber          DWDM System         Power Supply Systems        FAQS         Glossary          Contact me