UL-62093:2017 pdf free download – STANDARD FOR SAFETY Balance-of-System Components for Photovoltaic Systems一Design Qualification Natural Environments.
7.3.3.3 Requirements
For flat-plate lead-acid batteries, the Ah-cycling efficiency (at 20 °C) shall be at least 94 %.
For tubular plate lead-acid batteries, the Ah-cycling efficiency (at 20 °C) shall be at least 92 %. For nickel-cadmium batteries, the Ah-cycling efficiency (at 20 °C) shall be at least 90 %.
8 Major visual defects
For the purposes of design qualification, the following are considered to be major visual defects:
a) broken, cracked, bent, misaligned or torn external surfaces;
b) corrosion of any part of the component, inside or outside;
c) dust, water or fungus intrusion into the electrically active interior of the component;
d) loss of mechanical integrity, to the extent that the installation and/or operation of the component would be impaired.
8DV D2 Modification of item (b) by replacing it with the following:
b) corrosion or discoloration of any part of the component, inside or outside; 9 Report
Following design qualification, a report of the qualification tests, with measured performance characteristics and details of any failures, re-tests or omissions shall be prepared by the test laboratory. The report shall meet the requirements laid down in ISO/IEC 17025. A copy of this report shall be kept by the manufacturer for reference purposes.
10 Modifications
Any change in the design, materials, components or processing of the component may require a repetition of some or all of the qualification tests.
11 Test procedures
11.1 Visual inspection
11.1.1 Purpose
The purpose of this test is to detect any visual defects in the component.
11.1.2 Procedure
Carefully inspect each component for the following conditions:
— broken, cracked, bent, misaligned or torn external surfaces;
— faulty interconnections or joints:
— visible corrosion of any part of the active circuit:
— visible corrosion of output connections, interconnections and bus bars;
— visible corrosion of the enclosure surface;
— cracked or damaged wire or cable;
— faulty terminals, exposed energised electrical parts;
— any other conditions which may affect functioning, performance or safety.
Make note of and/or photograph the nature and position of any defects which may worsen and adversely affect the component functioning in subsequent tests.
11.1 .2DV D2 Modification by adding the following before the last dash:
— visible discoloration indicating arcing has occurred;
11.1.3 Requirements
Visual conditions other than the major visual defects listed In Clause 8 are acceptable for the purpose of design qualification.
11.2 FunctIoning tests
11.2.1 Functioning test procedure — charge controllers for lead-acid batteries
11.2.1.1 Overview
This procedure comprises charge controllers for lead-acid accumulators with liquid electrolyte (vented and valve regulated).
The tests described in this procedure are valid for charge controllers, which use the accumulator terminal voltage as a criterion for operation as well as modern control procedures (e.g. state of charge algorithms). In the case where all or some of these tests are not relevant for a specific type of charge controller, the manufacturer shall state this.
The following symbols are used in this document.