IEC 61557-13:2011 pdf – Electrical safety in low voltage distribution systems up to 1 000 v a.c.and1 500 V d.c.-Equipment for testing, measuring or monitoring of protectivemeasures- Part 13: Hand-held and hand-manipulated current clamps and sensors formeasurement of leakage currents in electrical distribution systems.
4.6 Mechanical requIrements
Current sensors of operating classes 1, 2 and 3 according to this standard shall comply with
the requirements of IEC 61010-2-032:2002, Clause 8.
4.7 PollutIon degree
Current sensors according to this standard shall be designed at least for pollution degree 2 according to IEC 61010•1.
4.8 Measurement category
Current sensors according to this standard shall be designed at least for measurement category Ill and minimum working voltage 01300 V according to lEC 61010-1.
4.9 ElectromagnetIc compatibility (EMC)
Current sensors according to this standard shall comply with the requirements of lEG 61326-2-2 or IEC 61326-I, whichever is applicable. immunity values shall comply with those for industrial locations, emission values shall comply with those for residential locations,
5 Marking and operating instructions
5.1 Marking
5.1.1 Current sensors according to this standard shall be maried with a framed pictogram which warns not to exceed the permissible limits of external low frequency magnetic fields related to the operating class. This pictogram shall be clearly visible in normal position. The colour of the frame and pictogram shall contrast with the background. Figure 5 shows an example for an applicable pictogram for operating class 1.
5.1.2 Current sensors according to this standard shall be marked with the measuring range in accordance with 4.3.
In addition, maximum load current and rated range of frequency according to 4.1 shall be marked.
5.1.3 The intrinsic uncertainty shall not be marked on the current sensors.
NOTE Th. marking with lb. p.tc.ntag. op.ratin uncertainly is allowed
5.2 Operating Instructions
5.2.1 Operating instructions of current sensors according to this standard shall be In compliance with the requirements of EC 61557-1 and IEC 61010-2-032 and shall provide additional information according to 5.1.
5.2.2 Operating instructions shall include statements about optimized positioning of the current sensors and evaluation of influences caused by low frequency external magnetic fields and caused by contamination of the jaws. If necessary, instructions about fixing devices shall be added.
5.2.3 Operating instructions shall include statements about rated burden, if applicable.
5.2.4 Operating instructions shall include information about the relationship between load current and measuring range for the differential method.
5.2.5 Operating Instructions shall Include Information about the recommended recalibratlon period.
5.2.6 The pictogram Figure 5 shall be listed under ‘Warning symbols’ and shall be explained sufficiently.
6 Tests
In addition to lEG 61557-1 me following tests shall be performed.
6.1 Type tests
6.1.1 Electrical safety
The electrical safety of current sensors according to this standard shall be verified according to IEC 61010-2-032 (type test).
6.1.2 Variations
VarIations for current sensors according to this standard shall be verified according to Table 2 under minimum rated operating conditions according to 45 (type test).
6.1.3 Percentage operating uncertainty
The percentage operating uncertainty B of current sensors according to this standard shall becalculated using the equation of Table 2 and taking into account the variations verified under6.3 (type test).
6.1.4 Marking and operating instructions
The existence of information according to 5.2 shall be verified (type test).6.2Routine tests
6.2.1 Intrinsic uncertainty
The intrinsic uncertainty A of current sensors according to this standard under referenceconditions specified by the manufacturer shall be verified (routine test).
6.2.2 Marking and operating instructions
The existence of marking and pictogram according to 5.1 shall be verified (routine test).