GB/T 18802.31-2016: Low-voltage surge protective devices -- Surge protective devices for specific application including d.c. -- Part 31: Requirements and tests for SPDs in photovoltaic applications

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Scope

This part specifies the performance requirements and test methods for SPDs
installed on the DC side of a photovoltaic system. This type of SPD is used to
reduce the impact of lightning induction or direct lightning on the DC side of
photovoltaic power generation equipment. These appliances will be connected
to the DC power circuit of a photovoltaic power generation equipment which
has a rated voltage not exceeding 1500 V.
This part considers the following characteristics of photovoltaic power
generation equipment.
- Characteristics similar to current sources;
- The nominal current depends on the light intensity;
- The short-circuit current is almost equal to the nominal current;
- Output various sizes of voltage, current and power in series and/or parallel
combination, from several hundred watts (civil facilities) to several
megawatts (photovoltaic field).
The very special electrical parameters on the DC side of the photovoltaic
equipment place special test requirements on the SPD.
SPD with special series impedance between separate input and output
terminals (so-called two-port SPD in EN 61643-11) are not currently fully
covered by the performance requirements of this standard, which require
additional consideration.
Note. For SPD used in photovoltaic systems, for power efficiency
considerations, special series impedances are typically not included between
the input and output terminals.
SPD conforming to this standard are only designed to be installed on the DC
side of a photovoltaic generator. Regardless of photovoltaic equipment
containing battery packs and other DC equipment, it requires additional
requirements and tests for SPDs used in this equipment.
For SPD where the manufacturer states that the overload characteristic is short-
circuit mode, special measures must be required to prevent the DC arc that
may be generated during the maintenance and replacement of such SPD from
jeopardizing the operator.

Basic Data

Standard ID	GB/T 18802.31-2016 (GB/T18802.31-2016)
Description (Translated English)	Low-voltage surge protective devices -- Surge protective devices for specific application including d.c. -- Part 31: Requirements and tests for SPDs in photovoltaic applications
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	K30
Classification of International Standard	29.240.10
Word Count Estimation	55,572
Date of Issue	2016-02-24
Date of Implementation	2016-09-01
Regulation (derived from)	National Standard Announcement No
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China