IEC 60358-4 pdf free download
IEC 60358-4 pdf free download.Coupling capacitors and capacitor dividers – Part 4: DC or AC single-phase capacitor dividers.
6.1 Insulation requirements
6.1 .400 AC applications
Subclause 6.1 of IEC 60358-1:2012 is applicable, unless otherwise specified in the specific product standard.
6.1 .401 DC applications
Subclause 6.1 of lEO 60358-1:2012 is applicable with the following replacement for DC
withstand voltage test
For DC application, the DC withstand voltage test is defined with a factor FT= 1,5. The voltage shall be applied during one hour in both polarities, unless otherwise specified in the specific product standard.
DC-test voltage = (FT x Urn) = 1,5 X Urn.
6.2 Other insulation requirements
Subclause 6.2 of IEC 60358-1:2012 is applicable except for the following modifications in
6.2.1 and 6.2.2:
6.2.1 Low voltage terminal not exposed to weather
Replace Subclause 6.2.1 of IEC 60358-1:2012 with the following new subclause:
6.2.1.400 Intermediate voltage terminal and low voltage terminal non exposed to weather
Intermediate voltage terminal and low voltage terminal shall withstand an AC voltage of 3 kV against earth terminal, unless otherwise specified in the specific product standard.
If the intermediate voltage is higher than 0,72/13 kV, the test voltage has to be adapted according to Table 3 of 60358-1 :2012.
6.2.2 Low voltage terminal exposed to weather
Subclause 6.2.2 of IEC 60358-1:2012 is applicable, with the following addition:
6.2.2.400 Intermediate voltage terminal exposed to weather
Intermediate voltage terminal shall withstand the AC voltage test according to Subclause 6.2.2 of IEC 60358-1:2012, unless otherwise specified in the specific product standard.
6.3 Electromagnetic emission requirements — Radio interference voltage (RIV) Subclause 6.3 of IEC 60358-1:2012 is applicable, with the following modification: Delete Note 2.
Annex C of IEC 60358-1:2012 is applicable, with the following modification: Delete Note 3.
6.4 Mechanical requirements
Subclause 6.4 of IEC 60358-1:2012 is applicable, unless otherwise specified in the specific product standards.
7 Test conditions
Clause 7 of IEC 60358-1 :2012 is applicable.
8 Classification of tests
8.1 General
Clause 8 of IEC 60358-1 :2012 is applicable.
8.2 Routine tests
Subclause 8.2 of lEO 60358-1:2012 is applicable with the following additions:
8.2.400 Routine tests for voltage divider
Subclause 9.2.400.2 gives supplementary information how to perform the power frequency withstand voltage test on an intermediate terminal.
The following supplementary tests shall be done:
a) Verification of terminal marking (9.2.400.3)
8.3 Type tests
Subclause 8.3 of lEO 60358-1:2012 is applicable.
8.4 Special tests
Subclause 8.4 of IEC 60358-1:2012 is applicable.
9 Routine tests
Clause 9 of IEC 60358-1:2012 is applicable with the following additions:
9.1 Tightness of the liquid-filled equipment
Subclause 9.1 of IEC 60358-1:2012 is applicable.
NOTE Tightness test for gas insulated equipment is specified in Subclause 9.1.2 of IEC 60358-1:2012.
9.2 Electrical tests
Subclause 9.2 of lEO 60358-1:2012 is applicable, with the following additions:
9.2.400 Electrical tests for divider
9.2.400.1 General
The routine tests on the capacitor part are specified in Subclause 8.2 of IEC 60358-1:2012
with the following modifications:
9.2.400.1.1 Capacitance, tanö and resistance measurement
The HV-capacitance shall be measured as in Subclause 9.2.2 of lEG 60358-1:2012. The LV-capacitance can be measured with different methods (for ex: RLC bridge, etc.).
If any resistor component is placed inside:
The HV-resistance shall be measured as in Subclause 9.2.6 of IEC 60358-1:2012.
The LV-resistance can be measured with lower voltages.
9.2.400.1.2 DC withstand test
The test voltages and the duration are defined in Subclause 6.1.401.
Due to temperature reasons, a cooling down period is allowed between both polarities. This test has to be done before the PD measurement.
NOTE By agreement between purchaser and manufacturer, this test can be replaced by an AC test at DC test voltage according to Subclause 6.1.401 divided by v2.
9.2.400.2 Routine tests for low voltage device
The low voltage terminal and intermediate voltage terminal may be shorted together and AC test voltage shall be applied between them and protective earth during one minute as shown in Figure 400; the voltage level is defined in Subclause 6.1 of IEC 60358-1:2012.
If a voltage limitation device is connected on protective earth, it shall be disconnected during the test.
Neither breakdown nor flashover shall occur during the test.IEC 60358-4 pdf download.
