This standard provides requirements for low-voltage (600 V ac and below) definite-purpose switching (LVDPS) devices (other than power circuit breakers) for use in metal-enclosed low-voltage power circuit breaker switchgear described in IEEE Std C37.20.1(TM). These switching devices may be used in motor control or other repetitive duty applications and have the following characteristics: a) Drawout type, three-pole construction; b) Integral current-limiting fuses for short-circuit protection; c)… read more Power operated, with integral or separately mounted overcurrent protective devices; In this standard, the term "LV-DPS device" denotes a low-voltage definite-purpose switching device conforming to the requirements of this standard. read less
This amendment implements corrections and adds new information essential to properly test AC high-voltage circuit breakers as well as further harmonize this document with other industry standards. Considered modifications are regarding the TRV values and their harmonization with IEC 62271-100 and IEEE C37.016, introduction of alternative testing procedures for T100s or introduction of an integrity check for vacuum circuit breakers.
This standard provides the preferred ratings for low-voltage ac (635 V and below) power circuit breakers,fused low-voltage ac (600 V and below) power circuit breakers, general purpose dc (325 V and below) power circuit breakers, and low-voltage dc (3200 V and below) power circuit breakers.
This standard applies to surge-protective devices (SPDs) intended to be installed on the load side of the service equipment connected to 50 Hz or 60 Hz alternating current (ac) power circuits rated at 1000 V (root mean squared [rms]) or less. Performance characteristics and standard methods for testing and rating are established for these devices, which may be composed of any combination of components. The tests in this standard are aimed at providing comparisons among the variety of surge-protective devices available.
This standard provides requirements for low-voltage (600 V ac and below) definite-purpose switching (LV-DPS) devices (other than power circuit breakers) for use in metal-enclosed low-voltage power circuit breaker switchgear described in IEEE Std C37.20.1(TM). These switching devices may be used in motor control or other repetitive duty applications and have the following characteristics: a) Drawout type, three-pole construction; b) Integral current-limiting fuses for short-circuit protection; c)… read more Power operated, with integral or separately mounted overcurrent protective devices; In this standard, the term "LV-DPS device" denotes a low-voltage definite-purpose switching device conforming to the requirements of this standard. read less
This recommended practice outlines a test procedure for comparing two or more sealed insulation systems in accordance with their expected life at rated temperature. The procedure is limited to insulation systems for ac electrical machines using form-wound preinsulated stator coils rated 6900 V and below. The intent of this test procedure is to evaluate insulation systems for use with air cooling under severe environmental conditions, where the insulation is exposed to conducting contaminants.… read more This procedure does not cover special requirements, such as those for machines enclosed in gas atmospheres or machines subjected to strong chemicals or submersion in liquid, etc. The procedure includes instructions for testing candidate systems in comparison with known systems having a proven record of service experience and interpreting the results of these tests. read less
This recommended practice outlines test procedures for comparing two or more unsealed or sealed insulation systems in accordance with their expected life at rated temperature. The procedure is limited to insulation systems for AC electrical machines using form-wound pre-insulated stator coils rated 15 000 V and below. The intent of this test procedure is to evaluate unsealed insulation systems for use with air cooling under usual (normal) service conditions, or sealed insulation systems for use… read more under severe environmental conditions (where the insulation is exposed to conducting contaminants). This procedure does not cover special requirements, such as those for machines enclosed in gas atmospheres or machines subjected to strong chemicals, metal dust or submersion in liquid, etc. The procedure includes instructions for testing candidate systems in comparison with known reference systems, of the same type, having a proven record of service experience and interpreting the results of these tests. The intent of this test procedure is to evaluate unsealed insulation systems for use with ir cooling under usual (normal) service conditions, or sealed insulation systems for use under severe environmental conditions (where the insulation is exposed to conducting contaminants). This procedure does not cover special requirements, such as those for machines enclosed in gas atmospheres or machines subjected to strong chemicals, metal dust or submersion in liquid, etc. The procedure includes instructions for testing candidate systems in comparison with known reference systems, of the same type, having a proven record of service experience and interpreting the results of these tests. read less
This document recommends best practices for the measurement of partial discharges using AC voltages and VHF/UHF electromagnetic sensors for quality control during routine tests on factory and pre-moulded joints of HVDC extruded cable systems with rated voltage up to 800 kV. This recommended practice addresses the whole phenomenon of partial discharges, rather than solely on partial discharge pulse amplitude, in order to assess whether critical partial discharges are present in the tested object… read more (either a factory joint or a pre-moulded joint of a HVDC extruded cable system). By "critical partial discharge" it is meant here a discharge within the insulation of the object under test, excluding all external discharges that can be present during the AC voltage test, e.g. corona discharges due to HV electrodes, conducting leads, etc. related to the test setup. read less
This standard provides guidance and checklists for the collection of required data for performing an arc-flash hazard calculation study in accordance with the process defined in IEEE 1584-2018 and IEEE 1584.1-2022 for systems operating at three-phase 50/60 Hz alternating current (AC) 1000 V and below. This standard does not include collection of data required for performing other system studies, such as a short-circuit study and overcurrent protective device coordination study. Results from… read more these system studies are required to conduct an arc-flash hazard calculation study. read less