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.

SPINNER Power ProtectorThe new SPINNER Power Protectors prevents the master unit from being damaged by high power

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:

SPINNER Power Protector BTS 01


In the event of a fault, the BTS can feed too much power:

SPINNER Power Protector BTS

Currently, the standard solution is for the BTS to be operated at maximum power, which is then reduced by an attenuator:

SPINNER Power Protector BTS 03

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:
SPINNER Power Protector BTS 04


In the event of a BTS fault, the Power Protector interrupts the RF signal:
SPINNER Power Protector BTS 05

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.

Power Protector ist einsetzbar als Einzelgerät oder als Bestandteil einer kundenspezifischen Projektlösung und findet in 19-Zoll-Schränken PlatzThe Power Protector can be used as an individual unit or as part of a customer-specific solution. It is mounted on a 19” rack.

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:

SPINNER Power Protector BTS 04
In the event of a BTS fault, the SPINNER Power Protector PRO makes sure that operation continues:

SPINNER Power Protector BTS 06

For more information on the Power Protector, please contact us at This email address is being protected from spambots. You need JavaScript enabled to view it..

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