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- Recommendation K.17
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- 1. Amend Figure 1:
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- 2. Point 2.1, after the description of Test 3, insert the following:
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- "- Test 1a between input terminals of the repeater and conductive housing normally connected to earth
- in the case of symmetric pair repeaters;
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- - Test 2a between output terminals of the repeater and conductive housing normally connected to
- earth in the case of symmetric pair repeaters.
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- Equipments protected with arresters and installed on symmetrical pair cables, which are induced by a.c.
- power or traction lines, can be tested with an alternating current, applied for 0.5 second. Current intensity
- and frequency are comparable to the alternating currents that are likely to be met with in practice, but
- should not exceed 10 A r.m.s."
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- 3. Amend Figure 3 and Table 1:
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- 4. Add new point 3.3:
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- "3.3 Test conditions for regenerators and power feeding sources used on optical fibre transmission systems
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- The following tests are applicable for all types of regenerators:
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- In principle two types of regenerators exist:
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- Regenerators with housings on floating potential and regenerators with housings connected to local
- earth. The regenerators may also be power-fed via separate d.c.-converters. Both alone standing units may
- be also considered as one "regenerator" with respect to this Recommendation."
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- 3.3.1 Prototype tests
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- 3.3.1.1 Impulse tests
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- These tests will be carried out under conditions listed in column 1 of Table 2/K.17.
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- Tests should be applied to equipment as indicated in Figure 5/K.17.
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- - Test 1 - Between terminals a and b of the power feeding path.
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- - Test 2 - Between terminal a of power feeding path and reference earth.
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- - Test 3 - Between terminal b of power feeding path and reference earth.
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- - Test 4 - Between both terminals a and b of power feeding path and reference earth.
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- Earth connections of housings with reference earth should be the same as used in practice.
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- 3.3.1.2 A.C. Tests
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- 3.3.1.2.1 Short-term a.c. induction
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- These tests are carried out under conditions listed in Table 3/K.17.
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- Tests 1, 2, 3 and 4 should be applied to equipment as indicated in Figure5/K.17 and explained in _
- 3.3.1.1.
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- 3.3.1.2.2 Steady state a.c. induction
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- These tests should be carried out in accordance with _ 2.3 b and equipment should operate during tests
- without significant increase of bit error rate.
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- 3.3.1.3 Immunity test against fast transients induced in the power feeding path
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- These tests may be carried out to ensure that the regenerator is sufficiently protected against transients
- occurring in the power feeding path.
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- These tests should be applied to equipment as indicated in Figure6/K.17.
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- For testing a generator, according to IEC, Publication 801-4 should be used. At test voltages up to 1 kV
- the simulated signal transmission should not be disturbed severely. It is recommended to carry out this test,
- if the power feeding path is not sufficiently shielded and interferences due to switching in electric power
- systems may be expected.
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- 3.3.2 Acceptance tests
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- Only impulse tests will be carried out under conditions listed in column 2 of Table 2/K.17.
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- Tests 1 and 4 have to be performed taking into account the remarks given in _ 1.4.
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