IEEE C93.3-2017 pdf download

IEEE C93.3-2017 pdf download.IEEE Standard Requirements for Power-Line Carrier Line Traps(30 kHz to 500 kHz).
For a field adjustable wideband line trap. the rated minimum blocking impedance shall be 400 , 600 12. 1000 12, or configured for any of these impedances as agreed between the manufacturer and purchaser.
For a factory fixed wideband line trap. the rated minimum blocking impedance shall be 400 12, 600 12, or
1000 12.
5.2.4 Variation of blocking characteristics with change in ambient temperature and change in continuous current
5.2.4.1 Single- and two-frequency tuning
The resonant frequency shall not vary more than a total of 2% for changes in both the ambient temperature and the continuous current within the temperature range of—40 °C to ±45 °C, and from zero to rated continuous current.
5.2.4.2 Wide band tuning
For the field-adjustable type, the geometric mean frequency shall not vary more than a total of 2% for changes in both the ambient temperature and the continuous current within the temperature range of—40 °C to +45 °C, and from zero to rated continuous current.
For the factory-fixed type, the minimum blocking impedance over the bandwidth shall be maintained for changes in both the ambient temperature and the continuous current within the temperature range of—40 °C to +45 °C, and from zero to rated continuous current.
5.2.5 Auxiliary protective device rating
The “main” protective gap defined in 5.1.8, is usually for lightning or high fault currents that, in turn, develop high voltages across the entire inductive coil of the line trap. This is typically referred to in line-trap literature as the lightning protective device.
Any “auxiliary” devices would typically he downstream for additional protective clamping for that particular downstream device unless the trap manufacturer decided to add additional levels of protection to back up this function. Any clamping or protective devices need to he self-restoring and auto-extinguishing of any spark activity. Auxiliary protective gaps shall neither sparkover nor continue to sparkover following transient voltage actuation, with the power frequency voltage, V as determined in 5. 1 .8. and 6.2. 12 across the main coil.
5.2.6 Tuning device insulation level
The insulation level for the tuning device shall be at least 30% above the value of the maximum 200 kV/ is front-of-wave protective voltage or of the 20 kA discharge voltage of the protective device, whichever is higher.
The insulation level for the tuning device components protected by an auxiliary protective device shall be at least 30% above the impulse sparkover voltage determined in item a) of 6.2. 13.
6. Testing
6.1 General
6.1.1 Test conditions
The test conditions are outlined as follows:
a) The ambient temperature range shall be from +10 °C through +50 °C.
c) The line trap for application at a usual altitude service condition may be tested at any altitude higher than 1000 m if appropriate attitude corrections from Table 2, Table 3, and Table 4 are applied.
d) The test units shall be new and in clean, dry condition.
e) The sequence of testing shall be optional, except where otherwise noted.
6.1.2 Design tests
6.1.2.1 General
The following design tests shall be performed by the manufacturer on one-line trap of each current and
inductance rating to ensure that its characteristics and performance meet the requirements of this standard:
a) Measurement of main coil inductance (see 6.2.1)
b) Temperature rise at rated continuous current (see 6.2.2)
c) Calculation of time to reach limiting temperature for rated short-time current (see 6.2.3)
d) Tensile strength test for suspension mounted line traps (see 6.2.4)
e) Mechanical strength for rated short-time current (see 6.2.5)
f) Turn-to-turn insulation test of the main coil (see 6.2.6)
g) Protective device tests (see 6.2.7)
h) Radio-influence voltage test (see 6.2.X)
i) Self-resonant frequency test (see 6.2.9)
6.1.2.2 Tuned type
The following additional design tests shall he performed by the manufacturer on one tuned-type line trap of each current and inductance rating to help ensure that its tuning characteristics and performance meet the requirements of this standard:
a) Bandwidth test (see 6.2.10)
b) Variation of blocking characteristics with change in ambient temperature and change in continuous current (see 6.2. 1!)
c) Power Frequency Test of protective device and auxiliary protective device(s) (see 6.2.12)
d) Insulation tests of the tuning device components protected by auxiliary protective device(s) (see 6.2.13)
e) Insulation test of an assembled tuned-type line trap (see 6.2.14)
6.1.3 Production routine tests
6.1.3.1 General
The following production tests shall be performed by the manufacturer on each line trap:
a) Measurement of main coil true inductance (see 6.3.1)
b) Measurement of main coil apparent power-frequency inductance (see 6.3.2).