IEC 61557-1 pdf free download
IEC 61557-1 pdf free download.Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c.一Equipment for testing, measuring or monitoring of protective measures Part 1: General requirements.
4.3 Rated operating conditions
The following rated operating conditions shall apply, except for insulation monitoring devices (IMD) in accordance with IEC 61557-8 and for insulation fault location systems (IFLS) in accordance with IEC 61557-9:
— temperature range from 0 °C to 35 °C;
— a position of ±900 from the reference position for portable measuring equipment;
— 85 % to 110 % of the nominal supply voltage for supply from the distribution systems (if applicable). The values in IEC 60038 shall be applied for a supply from the distribution system;
— the charge condition in accordance with 4.4 shall apply to the battery or batteries/ accumulators for measuring equipment with a supply from batteries/accumulators;
— the range of revolutions per minute stated by the manufacturer for measuring equipment with a supply from a hand-driven generator;
— frequency of the supply voltage ±5 % (if applicable).
NOTE Additional rated operating conditions are stated in other parts of the IEC 61557 series.
4.4 Battery test facility
Measuring equipment with power supplied from dry or rechargeable battery cells shall test and indicate that the state of charge of these batteries will permit measurement within the specification. This may be done automatically as part of the measurement cycle or as a separate function. Where the battery test is a separate function, the test load shall be of the same level as the one appearing during a measurement.
4.5 Safety
Measuring and monitoring equipment shall be in accordance with IEC 61010-1, IEC 61010-2-030, IEC 61010-031, IEC 61010-2-034 and, if applicable, IEC 61010-2-032, and with the following additional requirements.
Overvoltage categories and/or measurement categories are specified in the relevant parts of
IEC 61557.
Handheld measuring equipment shall fulfil the requirements for double or reinforced insulation.
The conductive parts of the terminals shall not be accessible and hazardous in connected, partially connected or unconnected conditions.
The protective conductor if used for measuring purposes shall be treated as a live part, except where a different requirement is specified in other parts of IEC 61557.
The terminals shall be designed so that the probe assembly can be connected to the measuring equipment reliably.
4.6 Electromagnetic compatibility
4.6.1 Immunity
For immunity requirements, IEC 61 326-1 :2012, Table 2 shall apply. For testing, see 6.5.
4.6.2 Emission
For emissions, either class A or class B limits in accordance with IEC 61326-1:2012, 7.2 shall apply.
6 Tests
6.1 General
Measuring equipment shall be tested in accordance with the safety standards IEC 61010-1, IEC 61010-2-030, IEC 61010-031, IEC 61010-2-034 and, if applicable, IEC 61010-2-032, and the EMC standards of IEC 61326 (all relevant parts).
All tests shall be carried out under reference conditions unless otherwise specified. The reference conditions are stated in the relevant parts of IEC 61557.
Tolerances are added in the relevant parts of IEC 61557.
6.2 Operating uncertainty
6.2.1 General
The operating uncertainty shall be determined according to 6.2.2 to 6.2.4.
6.2.2 Influence of changing position
The variation E1 due to changing the position in accordance with 4.2 and 4.3, if applicable, shall be determined for positions +900 or 90° from the reference position stated by the manufacturer (routine test).
6.2.3 Influence of temperature
The variation E3 shall be determined from the reference temperature at 0 C and 35 VC after the device has reached a state of equilibrium (type test).
6.2.4 Influence of the supply voltage
The variation E2 due to changing the supply voltage shall be determined under the following rated operating conditions (routine test):
— limits in accordance with 4.3 for measuring equipment supplied from distribution systems;
— limits in accordance with 4.4 and 6.3 for measuring equipment supplied from a battery/accumulator;
— limits in accordance with 4.3 for measuring equipment supplied by a hand-driven generator.
6.3 Battery test facility
The lower and upper limits for the battery voltage to which the battery test facility in accordance with 4.4 is set, shall be determined by means of an external voltage source. These values shall be used during the test in accordance with 6.2.4 as limits for variation E2 by changing the supply voltage (routine test).IEC 61557-1 pdf download.
