UL 2200-2020 pdf download

UL 2200-2020 pdf download.Stationary Engine Generator Assemblies.
57 General 57.1 A generator assembly shall comply with the applicable requirements when tested as described herein. A generator of a type not described specifically in this Standard shall be tested in accordance with the intent of these requirements. When any indications are observed during the test procedures that a generator does not continue to meet the requirements in intended usage, such supplementary tests shall be conducted as applicable. 57.2 A representative sample of a unit shall be subjected to the tests described in Sections 58 – 84. 57.3 A unit marked with one frequency rating is to be tested at that frequency. For a unit marked with a dual frequency rating such as 50/60 hertz or a frequency range such as 50 – 60 hertz, tests are to be conducted at the worst case frequency or frequency at which highest rated current is produced. Exception: For a unit marked with a dual frequency rating or a frequency range, the Temperature Test of Section 58, is to be conducted at the worst case frequency. 57.4 In preparation for testing, the unit is to be connected to the fuel supply and electrical input and output circuits as defined in the product ratings and installation instructions. 58 Temperature Test 58.1 The generator assembly is to be tested at full rated load. Parts shall not attain a temperature that damages required corrosion protection, adversely affects operation of safety controls, impairs the value of required thermal or electrical insulation, or results in creeping, distortion, sagging, or similar damage where such damage to the material or part results in a risk of fire or personal injury. The measured temperatures at specific points, corrected when applicable in accordance with 58.3 and with 58.8, shall not be greater than those specified in Table 58.1 and Table 58.2 unless otherwise indicated.
58.2 A temperature is determined to be constant when 3 consecutive readings taken at intervals of 10 percent of the previously elapsed duration of the test, and not less than 15 minutes, indicate no increase greater than 2°C (4°F). 58.3 During the Temperature Test, the temperature of a surface that is capable of being contacted by the user shall not be more than the value specified in Table 58.1. When the test is conducted at a room temperature of other than 25°C (77°F), the results are to be corrected to that temperature. Exception: A unit is not prohibited from exceeding the temperature limits specified for surfaces subject to casual contact in Table 58.1 when it is: a) A fixed unit so that the riskofcontact bypeople is reduced; b) Marked as required by94.5; and c) Provided with instructions as specified in 96.4(i). 58.4 With reference to 58.1, the test conditions for a generator having a 120/240 volt, single-phase output shall include maximum unbalanced load capability of the unit in accordance with the marking described in 91.2(b). 58.5 A thermocouple junction and the adjacent thermocouple lead wires are to be held securely in thermal contact with the surface of which the temperature is being measured. 58.6 Coil and winding temperatures are to be measured by thermocouples located on exposed surfaces, or by the resistance method. In a generator, the thermocouple is to be mounted on the integrally applied insulation of the coil wire.
58.9 When a unit is rated for an ambient air temperature higher than 25°C (77°F), the rating shall be indicated in the instruction manual in accordance with 96.4(j). 58.10 Thermocouples are to consist of wires not larger than 24 AWG (0.21 mm 2 ) and not smaller than 30 AWG (0.05 mm 2 ). When thermocouples are used in determining temperatures in electrical equipment, it is common practice to employ a temperature-indicating instrument with thermocouples consisting of 30 AWG iron and constantan wire. Such equipment is to be used wherever reference temperature measurements by thermocouples are required. The thermocouples and related instruments are to be accurate and calibrated in accordance with standard laboratory practice. The thermocouple wire is to conform with the requirements listed in the Tolerances on Initial Values of EMF versus Temperature tables in ASTM E230.UL 2200-2020 pdf download.