The SPINNER Power Protector:
Intelligent Protection for Active In-Building Solutions
If you have installed a large number of technical devices in your equipment rooms, you naturally want to protect and efficiently use them. The new SPINNER Power Protector prevents the master unit from being damaged by high power while greatly helping to reduce capital expenditures. The following three scenarios show the forms that this protection can take.
Szenario 1: Application without SPINNER Power Protector
Installations involving an attenuator are standard in many equipment rooms. Because base transceiver stations (BTS) operate at high power and attenuators typically also generate heat, the rooms are usually air-conditioned or equipped with a powerful air extraction system.
The BTS is operated in low-power mode and feeds the required power level to the master unit:
In the event of a fault, the BTS can feed too much power:
Currently, the standard solution is for the BTS to be operated at maximum power, which is then reduced by an attenuator:
Scenario 2: Application with SPINNER Power Protector
The SPINNER Power Protector is inserted in the feed line running from an RF system like a BTS and a low-power unit such as an in-building master unit.
There it monitors the power level in the RF transmission line and automatically interrupts it if a defined maximum value is exceeded. This value is easy to set between +5 dBm and +30 dBm using pushbuttons.
The BTS feeds the correct power level to the master unit:
In the event of a BTS fault, the Power Protector interrupts the RF signal:
The Power Protector thus prevents connected devices with low input levels from being damaged if a fault causes the base station to switch to high output. The Power Protector operates within a frequency range from 350 to 3,800 MHz. A display indicates the set cutoff value and the actually measured power level.
The Power Protector from SPINNER also features an auto-recovery function. As soon as the power level returns to a predefined normal value, the Power Protector exits protection mode and allows the signal to pass again.
Significant Cost Savings for Operators
This configuration lets the BTS operate safely in energy-saving mode, with the added benefit of eliminating the need for a conventional attenuator. This both reduces power consumption and prevents extra heat in the equipment room.
Scenario 3: PRO Version for Uninterrupted Operation
A PRO version is also available. If the power in the BTS rises excessively, the Power Protector routes the signal via a bypass while attenuating it, then feeds it back to the connecting line at a predefined level. The signal is not interrupted in the event of a fault. The cutoff point at which the Power Protector switches to the bypass can be freely selected, and an appropriately dimensioned attenuator is installed as required.
The BTS is operated in low-power mode and feeds the required power to the input of the master unit, which eliminates the need for an attenuator:
In the event of a BTS fault, the SPINNER Power Protector PRO makes sure that operation continues: