Telecom

 

Solutions for cell towers power systems

 

The challenge

Cell towers around the globe are expected to sustain the cellular network in all conditions. This expectation can turn into a real challenge in remote locations or in areas of the world where grid reliability is questionable.

As a result, most BTS (Base Transceiver Stations) are equipped with generator sets, whose role is to provide emergency backup or to act as a prime power source.

The resulting fuel consumption can then account for up to 60% of the Total Cost of Ownership (TCO) of a genset supporting a mobile network tower, with an average consumption of 1500 liters/year.

 

In this context, genset optimization, including the efficiency and reliability of the alternator, is a key route to significant money savings.

Our solution: reliable, efficient alternators

Engineered with top-quality materials and carefully assembled at our productions sites, our alternators are designed to provide long-lasting power with top performances in critical areas

  • Low reactance, meaning high ability to cope with load distortion
  • High efficiency and output for a reduced footprint and lower fuel consumption
  • High startup capability to lower interruption times

Leroy-Somer has a proven track record of providing alternators that withstand the test of time and environmental constraints.

RELATED PRODUCTS

​LSA 40 ​LSA 42.3 ​LSA 44.3
 

Increased performances with AREP excitation

Our patented AREP auxiliary winding excitation system is particularly relevant in the Telecom context, where it will improve the reliability of the cell tower power system. AREP-enabled systems can sustain longer standby periods than regular excitation setups, and have overall better performances.

AREP is available as an option on LSA 40, LSA 42, and LSA 44 products.

Leroy-Somer invented auxiliary winding technology 30 years ago, leading to a dramatic increase in performance and reliability on all product ranges: smaller footprint, increased resistance to short circuits, improved overload capacity, longer standby cycles, and a cleaner, steadier power supply.

 

Dedicated Variable Speed DC alternator

In off-grid operation conditions, our DC 48V variable speed alternator can replace a twin-gensets setup and adapt output power to the cell tower activity.

This approach is especially efficient when the tower is idle and the alternator running at low speed (900 RPM).

The Variable Speed Telecom alternator also features adavanced battery charging capabilities, making it a relevent solutions for hybrid cell tower installations. 

This technology can help reduce fuel consomption by up to 36% vs. a standard, diesel-only setup.

The Variable Speed LSAVS alternator integrates two special components:

  • A dedicated Automatic Voltage Regulator (R220-VSG) and rectifier that allows the alternator to deliver constant DC Voltage Output at two different speed.
  • An integrated load control module (CCM) to manage battery charging. All battery types are supported (OPzV, SBS EON, EXIDE, A600 and Evolion)

The CCM module can be configured to adjust charging rate, charge limits and grid paralleling settings.

Key Data 

Voltage ​48V DC
Power (PF 0.95)​ ​15.8 kVA @ 2000 RPM
5.3 kVA @ 900 RPM
Ripple - voltage​ ​< 1%
Ripple - current​ ​< 1.3%