PM Manual
Delta Region
Define of PM
PM : Preventive maintenance : 1- PM action taken during during visit visit to avoid any alarms to be existed. existed. 2- PM action enhance enhance site overview overview.. 3- PM action action protect protect site equipmen equipmentt .
PM team consists of :
1- Engin Enginee eerr ( Manage all technicians how to work in site and do ) A) Connect to microwave microwave & BTS. B) Check all alarms software and with NOC. C) Make battery test. D) Check all thing in site and monitor m onitor all work of tech. E) Solve any alarm appear in site.
Define of PM
PM : Preventive maintenance : 1- PM action taken during during visit visit to avoid any alarms to be existed. existed. 2- PM action enhance enhance site overview overview.. 3- PM action action protect protect site equipmen equipmentt .
PM team consists of :
1- Engin Enginee eerr ( Manage all technicians how to work in site and do ) A) Connect to microwave microwave & BTS. B) Check all alarms software and with NOC. C) Make battery test. D) Check all thing in site and monitor m onitor all work of tech. E) Solve any alarm appear in site.
Define of PM
2- Technicians echnicians : A) Power Tech. (check all thing related to power power connection ). B) AC Tech. ( check and maintain air conditions in site). C) Rigger Tech Tech (check all thing put in tower feeders, Microwave Dish, Antennas ).
And all when finished work with other to clean site.
1- Shelter Diameter
We take all Dimensions for shelter as draw in pic.
2-Shelter Door
We check shelter door item item as in checklist and if aproblem: if lock damaged we change it , if anti-panic we change it .
3- Shelter Walls
We check all panels sealing and if any problem in sealing we solve it in time by .
4-Shelter Floor
We must use water to clean floor and all shelter , we use washer machine to clean all shelter from inside and outside.
5-Shelter Roof & Rain shield
We check roof status and clean it and if a problem : 1. if not fixed well we must fix it by using nails (before fix we must isolate it by using sika).
6-Shelter supporting I-Beams
We check I-Beams fixation and if not we must fix by using screws. We check galvanization and rust and solve it if a problem by re-galvanization or paint rust place (we first clean rust place by
7-Cable entries
8- Fire Panel & Extinguisher
8- Fire Panel & Extinguisher
Check
fixation Check sealing Check if panel have any alarm Disconnect AC power and check batteries Check earth for metal type Check both zone and alarm on BTS
9-Power system
We check power source if generator or commercial and if commercial we must take reading and serial number of meter and if generator we check general status of generator and if a problem we escalate it.
Commercial
Generator
9- Power Source
10- Main Circuit Breaker
11- Meter Box
12-Electrical Component
13- Main Distribution Board
Check panel fixation Check circuit diagram correspond Check C.B rate commensurate with load Check panel body earth All component must be fixed at panel All cables must connected by terminals Remove any duplicated terminals connection Remove any welding cables in MDB duct Check All CBs. Check all component labels
MDB
Surge arrestor
Relay(Over /under) volt
Shortening Bars
Phase Contactor
Earth leakage
13- Main Distribution Board
14-Phase Measurement
15-Phase Measurement
16-Phase Measurement
1717- MDB MDB
18-Surge Arrestor
Surge Arrestor
A surge protector (or surge suppressor ) is an appliance designed to protect electrical devices from voltage spikes. A surge protector attempts to limit the voltage supplied to an electric device by either blocking or by shorting to ground any unwanted voltages above a safe threshold.
Impact if surge not found or faulty in MDB: Caused damaged for other equipment and may be cause fire in site so we must change it if faulty and install it if not found in MDB.
19-Voltage Monitor [Relay]
Relay (Over/Under)volt
Used to ensure the sequence is correct when connecting 3 phase loads. With an incorrect phase sequence the relay will de-energise preventing the starting of incorrectly connected machinery. The relay wilt also trip if there is a phase loss and can therefore be used as a phase failure relay.
setting : ((1.25 max) (0.75 min)) or ((1.2 max) (0.8 min)) 1. Umax = (1.05 to 1.30) * 220V. 2. Umin = (0.70 to 0.95) * 220V. 3. Time = (1 to 10 ) second
Relay (Over/Under)volt
Impact : 1. If there over volt relay will make power off. 2. If there under volt relay will make power off. 3. If setting not matched as design setting power will be not stable and cause a problems for all equipment (especially Micro link RTN (sensitive for power)) and batteries charging .
20- 3-Phase Contactor
(3-Phase Contactor)
Working like a switch in circuit and used to beside phase sequence to complete the protection of site.
Contactor work depend on Relay mechanism.
Impact : If faulty site became without protection and we must change it.
4- Earth Leakage
The main purpose of earth leakage protectors is to prevent injury to humans and animals due to electric shock.
Earth leakage protection is an important part of the electrical safety scheme for any system, although it may present some implementation difficulties where there are conflicts between the safety ideal and the operational reality. It is vital for us to make certain that the system that we are using is configured to meet the best possible balance of needs. Earth used to protect all our equipment from overload which happen due to any problem in cables tighten or cut in cable or stolen in cables (earth) which affect site equipment so when any problem happen earth leakage sense any problem circuit broken off in time.
So when CB off we go to site and solve problem.
Earth Leakage
Impact of not use earth leakage: will affect all equipment and will cause damaged for equipment in site.
21- Earth System
22- Earth System
Site Earthing
Check main earth connection Retighten all earth connection Distribute all earth on its plate Check all trays earth Install grease for all outdoor earth bar Check tower or mast earth connection
Site Earthing
Earth test make by earth meter
23-Cable Tray
24- A/Cs
1- Fixation: Ensure that indoor and outdoor unit fixed well.
2- Power of indoor and outdoor unit We check connection of power and be sure that cables isolated and have terminals and tighten well.
3- Cleaning By using water and blower.
4- Isolation We check isolation of Freon pipes.
5- Freon pressure & current 1- Check if freon perfect in site or not by using Gauage. 2- Check current ( suitable current 11 to 13 Amp.).
7- Compressor & Capacitor
A) Check compressors if worked or not and if need new one if : 1- Rotary. 2- Cobland.
B) Check capacitor status and be sure that worked by measured it (50 micro farad).
24-AC System
23-AC System
24-AC System
25-AC System
26-AC Controller
27-Alarm System
28- Site Cleaning
29- Site Cleaning
30- Power System
31- Power System (Rectifier)
32- Power System (Batteries)
How to do Battery test
1
Check AC Power Volt reading
L-L Reading
L-N reading
2
Check AC phase load reading
3
Check Rectifier setting
4
Check battery charging system
5
Check DC Power Volt reading for all Battery strings
6
check battery volt for all battery
7
Check DC Power Ampere reading for all Battery strings
8
Battery test Summery
1. after check AC Power items,DC power items and Rectifier setting, disconnect AC Power and wait 10 min 2. We make steps in slide 9,10,11 and write data in Battery test sheet after 10 min then every 30 min till Volt become 45V or we reach 3 hour
Battery test table
33- BTS
BTS 1- Fixation check fixation of BTS and tighten all screws well.
BTS 2- Dummy Boards check if their dummy boards or not.
3- Cable arrangement
BTS
4- Earthing Check earth of cabinet
BTS 5- Feeder cables & jumpers arrangement inside & outside
BTS 6- BTS software
BTS
34- Transmission
IDU 1- IDU fixation & Grounding
IDU 2- Power connection Check power cable connection well in circuit breaker in Rectifier.
3- Check IF cable connection Check it and be sure that tighten well. 4- Check labels.
IDU 5- Check all alarms Check if any alarms & must be cleared in time if cannot clear in time if affect service we must take CR.
6- Check Rx level Check it and if not reach to design value we must send CR and finish it.
IDU
We used in delta different types of Microwave : 1- RTN (620 & 950 & 900 & 600). 2- NEC. 3- Ericson. 4- Alcatel.
And most link used in delta RTN and we can see how this link work and more details of link as below:
Transmission Methods
1
Coaxial cable communication
Optical fiber communication
MUX/DEMUX
M i c r o w a v e T E
Microwave communication
Satellite communication
M i c r o w a v e T E
MUX/DEMUX
2
Definition of Microwave
Microwave is a kind of electromagnetic wave. In a broad sense, the microwave frequency range is from 300 MHz to 300 GHz. But In microwave communication, the frequency range is generally from 3 GHz to 30 GHz.
3
•
Concept of Digital Microwave Communication
Digital microwave communication is a way of transmitting digital information in atmosphere through microwave or radio frequency (RF). –
Microwave communication refers to the communication that use microwave as carrier .
–
Digital microwave communication refers to the microwave communication that adopts the digital modulation.
–
The baseband signal is modulated to intermediate frequency (IF) first . Then the intermediate frequency is converted into the microwave frequency.
–
The baseband signal can also be modulated directly to microwave frequency, but only phase shift keying (PSK) modulation method is applicable.
–
The electromagnetic field theory is the basis on which the microwave communication theory is developed.
4
Digital Microwave Communication Modulation
Digital baseband signal is the unmodulated digital signal. The baseband signal cannot be directly transmitted over microwave radio channels and must be converted into carrier signal for microwave transmission.
Digital baseband signal
B a s e b r a a n t e d s i g n a l
Modulation
C h a n n e l b a n d w i d t h
IF signal
5
Microwave Equipment Antenna Hybrid coupler
IF cable
ODU Pole IDU
6
IDU 620
Support a maximum of 4+0 configuration or two groups of 1+1 configuration.
EXT
slot7
EXT
slot8
slot EXT 20 PXC
slot5
EXT
slot6
slot3
EXT
slot4
PXC
slot1
SCC
slot2
The slot numbering rule is the same as OptiX RTN 610 .
7
IF Board
The IF board receives and transmits 1x IF signal. It realizes the conversion between baseband digital signal and IF signal, it also provides -48V DC power supply and management signal to the ODU
IF Board -- Indicators
8
Indicator
STAT
SRV
LINK
Status
Meaning
On
The board is working normally
On
The board hardware is faulty.
Off
The board is not working, not created, or has no input power.
On
The service is normal.
On
The service has a critical or major alarm.
On
The service has a minor or remote alarm.
Off
No services are configured.
On
The space link is normal.
On
The space link is faulty.
IF Board -- Indicators
8
Indicator ODU
BER
Status
On
The ODU is normal.
On
The ODU is faulty.
On
The microwave BER exceeds the threshold.
Off
The microwave BER does not exceed the threshold.
On
The remote equipment has a Remote Defect Indication (RDI).
Off
The remote equipment has no RDI.
On
The board is in active state.
Off
The board is in standby state.
RMT
ACT
Meaning
PH1
9
The board processes multi-channel E1 signals and provides the E1 interface.
Indicator
1-8 channel E1 DB44
9-16 channel E1 DB44 interfaces
9
PH1 -- Board installation
Recommended installation sequence for TU boards
EXT
slot7
EXT
slot8
EXT slot5 slot 20 PXC slot3
EXT
slot6
EXT
slot4
PXC
slot1
SCC IDU 620
slot2
10
SD1
The board processes 1-2 channel STM-1 signal and provides STM-1 optical or electrical interface.
LC optical interface
11 •
Power Cross-Connection Clock Board -- PXC
The PXC board realizes the cross-connection (16 ×16 VC4) and clock functions , it also provides the DC power for other boards.
Power input interface
IDU Power
External clock/ Wayside
Indicator
PXC -- Indicators
11
Indicator
STAT
PWR
SYNC ACT
Status
Meaning
On
The board is working normally.
On
The board hardware is faulty.
Off
The board is not working, or not created, or has no input power.
On
The power is normal.
On
+3.3V power fault or -48V input power abnormal
Off
No input power.
On
The clock is normal.
On
The clock source is lost or the switch exists.
On
The board is in active state.
Off
The board is in standby status.
SCC
12
•
SCC provides system control and communication functions, auxiliary interfaces management and standby internal power module.
Flash memory
Indicators NM interface
Indicator test button
NM serial port
Reset button
Order wire
NM cascaded interface
Asynchronous data and Boolean interface
SCC Board -- Indicators
12
Indicator
STAT
PROG
Status
Meaning
On
The board is working normally.
On
The board hardware is faulty.
Off
The board is not working, or not created, or has no input power.
On 100 ms and off 100 ms
During the board power-on/reset, loading the software.
On 300 ms and off 300 ms
The board software is introduced through the BIOS during the power-on/reset.
On
Initialize the upper layer software.
On 100 ms and off
During the board power-on/reset, BOOTROM
SCC Board -- Indicators
12
Indicato r
Status On
During the board power-on/reset, the memory selftest fails or the upper layer software loading fails, or during the board running, the logical file and software are lost.
Off
The software is normal.
On
The system is normal.
On
The system has a critical or major alarm.
On
The system has a minor alarm.
Off
The system has no input power.
On
The system is in maintenance state ( that is, loopback, laser power-off, and ODU transceiver mute)
PROG
ALM
MANT
Meaning
Fan Board (FAN)
13
Indicator slot 20
EXT slot7 EXT slot5 PXC slot3 PXC slot1
EXT slot8 EXT slot6 EXT slot4 SCC slot2
Fan direction
Indicator
FAN
Status
Meaning
On
The fan is working normally.
On
The board is faulty.
Off
The board has no input power.
14
•
•
Outdoor unit (ODU) realizes the mutual conversion between IF analog signal and RF signal. ODU is irrelevant to the microwave transmission capacity. An ODU of the OptiX RTN 600 can support the transmission capacity from 4 E1 to one STM-1.
ODU -- Interface Grounding RSSI test double-screw bolt interface
IF interface
Antenna port
Dimension: < 260 mm X 260 mm X 92 mm (width X height X depth)
16
•
Hybrid coupler
When two ODUs share one antenna, the ODUs must be connected to an RF signal coupler/ splitter (hybrid coupler). Then, the hybrid coupler is connected to the antenna.
Secondary tributary port
Antenna port
Primary tributary port
17
1+1 Hot Standby Backup (1+1HSB)
mute
Active ODU
Active IF Board Cross-connection board Service board
Hybrid coupler Antenna
mute
Standby ODU
Standby IF Board
18
1+1 Space Diversity (1+1 SD)
Active ODU
Cross-connection board Service board
Antenna 1 Antenna 2
Mute
Standby ODU
Standby IF Board
19
1+1 Frequency Diversity (1+1 FD)
tf1 rf1
Active ODU
Antenna Hybrid
Standby ODU
tf2
rf2
Active IF Board Cross-connection board Service board
Standby IF Board
20
Space Frequency Diversity (1+1 SD+FD)
tf1
rf1
Active ODU
Active IF Board Cross-connection board Service board
Antenna 1 Antenna 2
Standby ODU
tf2 rf2
Standby IF board
35- DDF
DDF 1- DDF fixation Check fixation of DDF
DDF 2- Arrangement of DDF
DDF 3- Labels of DDF
36- Antenna & Feeder System
36- Antenna & Feeder System
36- Antenna & Feeder System
36- Antenna & Feeder System
36- Antenna & Feeder System
36- Antenna & Feeder System
