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La presente Parte 331 della Norma EN 61643 si applica ai varistori ad ossido di metallo (MOV) . Essa specifica le prove per i componenti utilizzati in applicazioni con tensioni fino a 1000 V in c.a. e 1500 V in c.c. su linee di alimentazione o di telecomunicazione o su circuiti di segnale; essi...
La presente Norma si applica ai diodi di rottura a valanga che costituiscono parte di componenti degli scaricatori utilizzati nella progettazione e costruzione di sistemi connessi a reti di bassa tensione, di trasmissione e di segnalazione. La presente Norma viene pubblicata nella sola lingua...
1.1 This specification establishes performance requirements of surge suppressors for use on shipboard ac power circuits. 1.2 Surge suppressor shall be a protective device for limiting voltage transients on equipment by discharging, dissipating internally, bypassing surge...
This Recommendation provides application guidance on multiservice surge protective devices (MSPDs) and explains how MSPDs provide local overvoltage protection for the services used by an equipment or equipment cluster. The requirements of the individual service surge...
1.1 These requirements cover indoor use cord and plug connected, relocatable power taps (RPT) rated 250 V AC or less and 20 Amperes or less. A RPT may include an integral Class 2 power supply with an integral lead and/or connector(s) output. In accordance with the National Electric Code, NFPA 70,...
1.1 These requirements cover indoor use cord and plug connected of permanently connected, furniture power distribution units (FPDU) rated 250 V AC or less and 20 Amperes or less. An FPDU may provide one or more receptacle outlets, inclusive of one current tap integral to the attachment plug, if...
This guide applies to surge-protective devices (SPDs) intended for connection to 50 Hz to 60 Hz ac power circuits rated 1000 V RMS or less. This guide describes the effects on SPDs of power system disturbances occurring in these low-voltage ac power circuits. The disturbances are not...
1.1 These requirements cover enclosed and open-type Surge Protective Devices (SPDs) designed for repeated limiting of transient voltage surges as specified in the standard on 50 or 60 Hz power circuits not exceeding 1000 V and for PV applications up to 1500 V dc and designated...
This guide applies to surge-protective devices (SPDs) intended for connection to 50 Hz to 60 Hz ac power circuits rated 1000 V RMS or less. This guide describes the effects on SPDs of power system disturbances occurring in these low-voltage ac power circuits. The disturbances are not...
This part of IEC 61643 specifies standard test circuits and methods for thyristor surge suppressor (TSS) components. These surge protective components, SPCs, are specially formulated thyristors designed to limit overvoltages and divert surge currents by clamping and switching...
This Recommendation applies to thyristor-based surge protective devices (SPDs) to be used for primary protection against surges due to lightning or power disturbances on telecommunication circuits, in accordance with [b-ITU-T K.11]. It covers the following device...
This part of IEC 61643 is applicable to Surge Protective Devices (SPDs), intended for surge protection against indirect and direct effects of lightning or other transient overvoltages. These devices are designed to be connected to the DC side of photovoltaic...
This part of IEC 61643 describes the principles for the selection, operation, location and coordination of SPDs to be connected to 50/60 Hz AC power circuits, and equipment rated up to 1 000 V RMS. These devices contain at least one non-linear component and are intended to limit surge...
IEC 61643-341:2020 specifies standard test circuits and methods for thyristor surge suppressor (TSS) components. These surge protective components, SPCs, are specially formulated thyristors designed to limit overvoltages and divert surge currents by clamping and switching...
This part of IEC 61643 specifies standard test circuits and methods for thyristor surge suppressor (TSS) components. These surge protective components, SPCs, are specially formulated thyristors designed to limit overvoltages and divert surge currents by clamping and switching...
