SN EN 61557-9 : 1999

1 Scope
2 Normative references
3 Definitions
4 Requirements
5 Marking and operating instructions
      5.1 Marking
      5.2 Operating instructions
6 Tests
      6.1 Type test
             6.1.1 Response sensitivity of the insulation
                      fault location system
             6.1.2 Test current (IT)
             6.1.3 Alarm indicator
             6.1.4 Clearance and creepage distances
             6.1.5 Dielectric test
             6.1.6 Electromagnetic compatibility (EMC)
             6.1.7 Additional requirements
             6.1.8 Marking and operating instructions
      6.2 Routine tests
             6.2.1 Response sensitivity
             6.2.2 Test current (IT)
             6.2.3 Alarm indicator
             6.2.4 Dielectric test
             6.2.5 Marking and operating instructions
             6.2.6 Record of routine tests
      6.3 Example of a test matrix for type and routine
             tests
Figure 1 - Example of the components included in an insulation
           fault location system
Table 1 - Requirements for insulation fault location systems
Annex ZA (normative) Normative references to international
                     publications with their corresponding
                     European publications

TO BE USED IN CONJUNCTION WITH IEC 61557-1. Gives the requirements for insulation fault location systems which localize insulation faults in any part of the system in unearthed IT a.c. systems and unearthed IT a.c. systems with galvanically connected d.c. circuits having nominal voltages up to 1000 V a.c., as well as unearthed IT d.c. systems with voltages up to 1 500 V d.c., independent of the measuring principle.