IEEE Std C62.43.1:2020 pdf download.IEEE Guide for Surge Protectors and Surge Protective Circuits Used in Information and Communication Technology Circuits (ICT), Including Smart Grid- Part 1 Applications.
This guide covers the application of surge protective devices (S PD) and equipment ports incorporating an SPD used to protect information and communication technology (ICT) circuits, including smart grid. This guide is not intended to cover individual surge protective components. Specifically excluded from this guide are stand-alone ac power protectors.
1.2 Types of surge protectors covered by this guide
This guide covers two types of surge protectors: Non-linear and linear, as illustrated in Figure 1. Configurations of the surge protectors are covered in 1 .3.
Differential-mode surge can be balanced or functionally bonded, so the mitigation is usually not reliant on functional bonding (see Figure 3).
The isolating transformer here only provides mitigation through frequency response difference to surge and the wanted service or core saturation. The in-line filter also has to have a different response to surge and service frequencies.
1.4 Surge protector configurations covered by this guide
1.4.1 Non-linear surge protectors
The surge protectors covered are series, parallel, or both combinations of non-linear, linear, or both elements. Non-linear surge protectors limit voltage, or current, or both. Linear surge protectors generally attenuate the effects of a surge. Figure 4 is based on Figure 1 of IEEE Std C62.36TM2O16 and illustrates functional block diagrams for the non-linear surge protectors covered by this guide.
The surge protectors covered by this guide are to be tested by means of the connections or terminations that are used when the surge protector is installed in the field. For surge protectors that are intended to be used with a base or connector, that base or connector is part of the tests.
The terms low-pass filter, high-pass filter, and band-pass filter designate categories. Filters in these categories are implemented according to design objectives, e.g., maximally flat response in the pass-band (Butterworth), steepest possible cutoff (Chebyshev), and linear phase. Of all possible designs, only linear phase preserves waveforms. This is an important consideration for filters used in digital systems, especially those employing QAM modulation, where any loss of waveform integrity can lead to transmission errors. The ability to implement any of these designs might be constrained by the need to pass dc (either for power, or because of the type of code used), which eliminates the possibility of capacitors in series with the line. Coaxial or waveguide filters are often of transmission-line design, such as a quarter-wave stub.IEEE Std C62.43.1 pdf download.