Power units for

telecommunications

COELMO power units

Use of aggregates in telecommunications

BTS are critical components of any mobile phone network because they allow the user to access the network. The transmission of voice and data and the widespread diffusion of wireless services require little power, but in a continuous and reliable way.

Coelmo developed several high-performance solutions for BTS sites, from the most traditional up to Full Hybrid Systems that use alternative energy sources, batteries storage systems and DC variable speed Generating Sets that drastically reduce the environmental impact in terms of emissions. Coelmo is able to offer the ideal solution for all environmental conditions and usage, minimizing investment costs (CapEx) and optimizing the operating expenses (OpEx).

Backup AC unit

Telecommunications power outages, which can be caused by grid failure or unstable power supply, should be avoided. To prevent this type of situation, it is best to rely on a standby AC generator set.

How does a standby AC unit work?

In this case, the load is usually connected to the mains. When a voltage or frequency error occurs, a start signal is sent to the generator after a preset delay. When the generator voltage is within the programmed limits, the load is connected to the generator until the power line returns to standard values. At this time, the load is passed back and the generator remains in no-load mode for a suitably set time to allow it to cool down.

DC generator set

The mains normally supplies the load and keeps the batteries charged at the same time. In the event of a mains failure, the battery bank supplies the load. IntegraTel® starts the emergency.

How does a variable-speed DC generator set with batteries work?

If the mains outage lasts long enough for the battery charge to fall below a predetermined threshold, IntegraTel® activates the emergency generator set. On the page The generator set provides power to both the consumers and to charge the batteries. It will be switched off by IntegraTel® when the batteries are fully charged. This operating principle increases the efficiency of the entire system, allowing significant savings in both operating costs and carbon dioxide emissions.

AC generators

Model	Coelmo PDT403-Da	Coelmo PDT403-Da	Coelmo PDT403-Da
Silnik
Model silnika	PERKINS 403D-11G	PERKINS 404D-22G	PERKINS 1103A-33G
Moc (PRP)	9 (11,4) kVA	20,3 (24) kVA	403D-15 Perkins
Obroty	1500 (1800) rpm	1500 (1800) rpm	1500 (1800) rpm
Częstotoliwość	50 (60) Hz	50 (60) Hz	50 (60) Hz
Pojemność cylindra	1131 cc	2216 cc	3300 cc
Zużycie paliwa	2 (2,4) l/h	4 (4,8) l/h	5,4 (6,6) l/h
Chłodzenie	Water	Water	Water
Alternator
Napięcie Trzy fazy	400 (440) Vac	400 (440) Vac	400 (440) Vac
Efektywność	86 (87) %	87 (89) %	88 (89) %

Variable speed DC generator sets

Model	TEL40-48GV	TEL6.5-48GV	TEL12-48GV	TEL18-48GV
Engine
Engine Model	403D-07 Perkins	403D-07 Perkins	403D-15 Perkins	404D-22 Perkins
Nominal Power	4 kW	8 kW	12 kW	20 kW
Speed Regolation	DC Linear Actuator	DC Linear Actuator	DC Linear Actuator	DC Linear Actuator
Speed Range	1400 - 1800	1400-2400	1400 - 2300	800-1900
N. of Cylinders	3	3	3	4
Displacement	0,76 l	0,76 l	1,5 l	2,2 l
Fuel Consumption	0,7 - 1,7 l/h	0,7 - 2,4 l/h	1,0 - 4,7 l/h	1,6 - 6,5 l/h
Cooling System	Water	Water	Water	Water
Alternator
Permanent Magnet Generator	AMP-04	AMP-07	AMP-12	AMP-18
Output Voltage	44 - 60 Vdc	44 - 60 Vdc	44 - 60 Vdc	44 - 60 Vdc
Voltage Ripple	< 150 mV pp	< 150 mV pp	< 150 mV pp	< 150 mV pp
Efficiency	90%	90%	90%	90%
Operating Temp.	-10°C / 60°C	-10°C / 60°C	-10°C / 60°C	-10°C / 60°C

Hybrid system

Coelmo Innovative DC Telecom solution

Coelmo's hybrid solution is a flexible power solution designed to supply DC power to telecom facilities 24/7.

Variable speed DC generator set:

Variable speed motor
DC voltage output
AC voltage output
Soundproof canopy

IntegraTel control panel:

"AND" logic linking power sources
Remote monitoring system

Battery bank:

Deep cycle batteries Rechargeable batteries
Autonomy 6h or 12h Integrated in the canopy
DC conditioning

Full hybrid system

Advantages:

Designed for the telecommunications industry
Reduces network operating costs
Reduced fuel consumption
Longer maintenance intervals

Lower maintenance costs
Reduced CO2 emissions
Reduced need for fuel storage and risk of spillage
Reduced frequency of fuel deliveries

Integratel energy management system

IntegraTel® is an intelligent system capable of simultaneously monitoring and managing different energy sources, to supply loads without voltage interruptions (no-break) and to exchange information on the CAN-bus network.

Connected to a power source (generator set and/or renewable energy), IntegraTel® supplies the loads and maintains the state of charge of the batteries.

Main features

Output short-circuit protection
Output reverse voltage protection (battery)
Low voltage and overvoltage protection
Battery charging function
Battery charging current limit

Programmable parameters
Hybrid controller
State of charge (SOC) calculation
Automatic voltage regulation
Multi-level charging technology
Temperature compensation

48-145Veff three phases

48Vdc

44-57 Vdc +/-1%

80/120/200 Adc

94%

<4mV

-5°/50°

DC motor drive

10Vrms/30Vrms

RS232/RS485

Data centre

Business continuity, 24 hours a day, 7 days a week, is essential when managing telephone networks and data centres on which the communications of thousands of users depend. A minimal interruption would mean heavy losses and dissatisfied customers.

The high reliability, strong resilience and revolutionary technology of Coelmo systems avoids the risks arising from power failures to infrastructure and databases.

This is the reason why the world's largest telecoms operators rely on Coelmo generators for their power supply and backup systems.

COELMO Generating Sets & more

Do you have any questions?

We remain at your disposal! Write to us and one of COELMO's specialists will contact you shortly.