IEEE 82:2002 pdf download.IEEE Standard Test Procedure for Impulse Voltage Tests on Insulated Conductors.
This test procedure applies to both switching impulse and lightning impulse tests on cables or cable systems incorporating laminated or extruded insulations. The term laminated cable, as used in this procedure, includes high-pressure pipe cable, low-pressure gas-filled cable, self-contained liquid-filled cable, solid- paper cable, and other taped cable designs. A cable system is a cable with one or more accessories attached.
This test procedure is not intended to replace any existing or future standards covering cable or cable accessories, impulse generators, impulse testing, or voltage measurements. It is intended to supplement such standards by indicating specific procedures for a specific type of cable system or cable system component.
This test procedure does not apply to cables or cable systems that utilize gas or gas spacers as the sole insulating medium. This test procedure applies to individual cable accessories only when referenced by the specific accessory standard.
1.2 Purpose
This test procedure is intended as a guide for impulse testing of insulated conductors (cables) and cables with accessories installed (cable systems). It can be used as a design or qualification test for cables or cable systems.
2. References
This standard shall be used in conjunction with the following standard. When the tbllowing standard is superseded by an approved revision, the revision shall apply.
3. Testing equipment
3.1 Impulse generator
The impulse generator should have sufficient capacity to deliver the required wave shape and magnitude to the test sample within the tolerances set.
3.2 Wave shape
A standard 1.2/50 us wave shall be used for lightning impulses. When possible, a standard 250/2500 ps
wave shall be used for switching impulses. These waves are defined fully in IEEE Std 4-1995.
3.2.1 Wave shape measurement
A calibrated voltage divider and transient recorder or oscilloscope shall be used to observe and record the impulse wave shape. The wave shape and magnitude shall be determined according to IEEE Std 4-1995. The wave shape shall be determined first at reduced voltage with the test sample connected to the test circuit.
3.2.2 Lightning wave shape tolerance
A wave within the following tolerances shall be used for lightning impulses:
a) Wave front time: 1.2 ± 0.36 p.s
b) Wave time to half-value: 50± 10 p.s
C) Wave peak value: ± 3% of required magnitude
When test circuit constraints or a large capacitance of the test sample make it impractical to meet the light- fling impulse wave specifications above, a wave front time of up to 5 p.s may be used with mutual agreement of’ the parties involved.
3.2.3 Switching wave shape tolerance
A wave within the following tolerances shall be used for switching impulses.IEEE 82 pdf download.