I.S. EN 50091-1-1:2004

Foreword
1 General
  1.1 Scope
  1.2 Normative references
  1.3 Definitions
  1.4 General requirements
  1.5 General conditions for tests
  1.6 Components
  1.7 Power interfaces
  1.8 Marking and instructions
2 Fundamental design requirements
  2.1 Protection against electric shock and energy
       hazards
  2.2 Insulation
  2.3 Safety Extra-Low voltage (SELV) circuits
  2.4 Limited current circuits
  2.5 Provisions for protective earthing
  2.6 A.C. and D.C. power isolation
  2.7 Overcurrent and earth fault protection
  2.8 Protection of personnel - safety interlocks
  2.9 Clearances, creepage distances and distances
       through insulation
  2.10 External signalling circuits
  2.11 Limited power source
  2.12 Protection of the applied load
3 Wiring, connections and supply
  3.1 General
  3.2 Connection to power
  3.3 Wiring terminals for external power conductors
4 Physical requirements
  4.1 Stability and mechanical hazards
  4.2 Mechanical strength and stress relief
  4.3 Construction details
  4.4 Resistance to fire
  4.5 Battery location
5 Thermal and electrical requirements
  5.1 Heating
  5.2 Earth leakage current
  5.3 Electric strength
  5.4 Abnormal operating and fault conditions
Annexes
A (normative) Test for resistance to heat and fire
B (normative) Motor test under abnormal conditions
C (normative) Transformers
D (normative) Measuring instruments for earth leakage
                current test
E (normative) Temperature rise of a winding
F (normative) Measurements of creepage distances and
                clearances
G (normative) Earth leakage current for UPS intended to be
                connected directly to IT power systems
H (informative) Guidance on protection against ingress
                of water and foreign objects
J (informative) Table of electrochemical potentials
K (normative) Thermal controls
L (normative) Backfeed protection test
M (normative) Examples of reference load conditions
N (normative) Ventilation of battery compartments
P (Void - contents transferred to 1.2 Normative references
Q (informative) A-Deviations
R (normative) Special national conditions

Applicable to electronic indirect a.c. convertor systems having an electrical energy storage device in the d.c. link.