IEC 60687:1992

FOREWORD
INTRODUCTION
Clause
1 Scope
2 Normative references
3 Definitions
  3.1 General definitions
  3.2 Definitions related to the functional elements
  3.3 Definitions of mechanical elements
  3.4 Definitions of insulations
  3.5 Definitions of meter quantities
  3.6 Definitions of influence quantities
  3.7 Definition of tests
4 Requirements
  4.1 Standard electrical values
  4.2 Mechanical requirements
  4.3 Climatic conditions
  4.4 Electrical requirements
  4.5 Electromagnetic compatibility (EMC)
  4.6 Accuracy requirements
5 Tests and test conditions
  5.1 General testing procedures
  5.2 Tests of mechanical requirements
  5.3 Tests of climatic influences
  5.4 Tests of electrical requirements
  5.5 Tests for electromagnetic compatibility (EMC)
  5.6 Tests of accuracy requirements
Annexes
A Relationship between ambient air temperature and
  relative humidity
B Voltage wave-form for the tests of the effect of
  voltage dips and short interruptions
C Electromagnet for testing the influence of
  externally-produced magnetic fields
D Test schedule

Applies to newly manufactured static watt-hour meters of accuracy classes 0,2 S and 0,5 S, for the measurement of alternating-current electrical active energy of a frequency in the range 45 Hz to 65 Hz and to their type tests only. This standard applies only to transformer-operated meters for indoor application consisting of a measuring element and register(s) enclosed together in a meter case. Their measuring range and rated current (In) are therefore in accordance with IEC 60185. Applies to operation indicator(s), test output(s) and meters which measure energy in both directions.