IEEE C37.90.3-2001 pdf download IEEE Standard Electrostatic Discharge Tests for Protective Relays
1. Scope
This standard specifies design tests for clectrostatic discharge (ESD) tests of protective relays and relaysystems. The object of the type test described in this standard is to confirm that the equipment beingtested will not misoperate or be damaged when installed, energized, and subjected to a specifiedelectrostatic discharge. Application of the discharge to any point on the equipment that is accessibleonly for repair and maintenance purposes is outside the scope of this standard.
This standard contains four annexes. Annex A is a bibliography. Annex B is an explanation of ESDHisturbance tests, Annex C is an explanation of an ESD generator. Annex D contains a comparison ofIEEE Std C37.90.3-2001 with IEC 60255-22-2 Ed.2.0 (1996-09)B41.
2. Definitions
For the purposes of this standard, the following terms and definitions apply. IEEE 100 TheAuthoritative Dictionary of Standards Terms, Seventh Edition B6, and IEEE Std C37.100-2001 IEEEStandard Definitions for Power Switchgear B7] should be referenced for terms not defined in this clause.
2.1 air discharge: A method of testing in which the charged electrode of the test generator isapproached to the unit under test, or coupling plane, and the discharge is actuated by a spark to theunit under test. or coupling plane. (A discharge ight not occur to nonconducting surfaces.)
2.2 contact discharge: A ethod of testing in which the electrode of the test generator is held in contactwith a conductive surface on the unit under test, or coupling plane, and the discharge is actuated by aswitch on the generator after the electrode contact has been made.
2.3 coupling plane: A metal plate to which discharges are applied to simulate electrostatic discharge toan object adjacent to the unit under test.
24 direct application: Application of the test directly to the unit under test.
2.5 indirect application: Application of the test to a coupling plane in the vicinity of the unit under test.
3. Electrostatic discharge disturbance test
3.1 Types of tests
Two test methods and two application methods are common. These are
a) Test methods
1) Contact discharge method
2) Air discharge method
b) Application methods
1) Direct application
2) Indirect application
Direct application to the unit under test using the contact discharge method shall be used when thepoints to be tested are conductive.
Direct application to the unit under test using the air discharge method shall be used when the pointsto be tested are nonconductive.
Indirect application (the use of a coupling plane) is applicable to protective equipment when the aitdischarge method fails to produce a spark.
3.2 Test procedure
A simple overview diagram of the test procedure is given in Figure 1.
IEEE C37.90.3-2001 pdf download
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