YD/T 983-2013Limits and methods of measurement of electromagnetic compatibility of telecommunicatin power supply equipment (English PDF)

4.1 General conditions

The TPE shall be tested under normal test conditions. The test conditions shall be

recorded in the report.

Regardless whether the TPE requires special software or test fixtures to connect to

the host equipment, the test layout shall be as close to the normal or typical actual

operation state as possible.

The test conditions of the TPE shall be as close to the actual installation conditions as

possible, and the wiring shall be consistent with the actual process. If the TPE is to be

installed in a rack or an enclosure as specified by the manufacturer, unless otherwise

stated, the TPE shall be installed according to the method stated in the instructions or

the installation manual.

If the equipment is part of the system or is connected to the ancillary equipment, the

equipment shall be connected to the ancillary equipment of the minimum typical

configuration during the test, however, the port connected to the ancillary equipment

shall be activated.

If the equipment has a large number of ports, it shall select a sufficient number of ports

to ensure that the actual situation can be simulated and that different types of ports

can be tested.

If the TPE consists of multiple telecommunication power supply modules, each

telecommunication power supply module shall be tested.

Measures shall be taken to avoid the effects of immunity test signals on the measuring

equipment and test ancillary equipment (e.g. signal sources, ancillary equipment, etc.)

located inside/outside the test environment. Measures shall be taken to avoid the

effects of auxiliary test equipment located inside/outside the test environment on the

test result.

During the test, the mode of operation and configuration shall be accurately recorded

in the test report.

Unless otherwise specified in the product instructions, the TPE shall be connected to

the resistive load.

The signal or control port shall be properly connected with the necessary AE or nominal

resistance.

The test shall be carried out under the condition of inputting the nominal voltage to the

input port.

4.2.2 Immunity test conditions and layouts

All tests shall be carried out under normal installation conditions of the TPE. The

distribution of power supply lines and signal lines, grounding, interconnection of cables

and the physical layout of the test system shall simulate typical and actual application

state and shall comply with the product instructions.

For the TPE subjected to the immunity test, it shall be powered on and working in

normal mode. The test shall be carried out under conditions such as specified

configuration, typical load configuration (including hardware, software and operating

procedures) and full operation.

It shall choose a configuration that minimizes the immunity. It shall consider the

possible layouts within the range of normal use.

The test shall be carried out under the condition of inputting the nominal voltage to the

input port.

Unless otherwise specified in the product instructions, the TPE shall be connected to

the resistive load.

The signal or control port shall be properly connected with the necessary AE or nominal

resistance.

During the test, the TPE may operate at a state of small output power (50 % of output

power is recommended). The actual output power of the TPE in the test shall be stated

in the test report.

The immunity to conducted disturbances test shall be carried out on the power supply

input port, power supply output port, and one port of each type of control ports on the

TPE.

Power supply lines and control line of not more than 3 m (according to the product

instructions) require no immunity test. However, the cables connected to the external

network shall be tested.

Internal connection cables between units on the same TPE need not be tested.

To test the TPE's ability to withstand malfunctions and damage to work, the design

6.1 Determination criterion A

a) During the EMC test of the equipment, the TPE output voltage shall be within the

normal working range.

b) During and after the test of the equipment, the TPE shall operate normally, and

there shall be no alarm, false alarm indication (power failure, protective failure,

etc.) or error display indication.

6.2 Determination criterion B

a) After the equipment is tested, the TPE shall work normally, and the output voltage

shall immediately be within the normal working range.

b) After the equipment is tested, the TPE shall work normally, and there shall be no

alarm, false alarm indication (power failure, protective failure, etc.) or error

display indication.

6.3 Determination criterion C

The equipment allows loss of monitoring and alarm functions, however, after the

equipment is tested, all functions shall be back to normal, and the output voltage shall

be within the normal working range.

6.4 Special determination criteria

Special determination criteria are applicable for the Grade 2 DC output port and Grade

6.4.1 Grade 2 DC output port

Immunity to conducted

disturbances, induced by radio-

frequency fields

9.2.5.2

8.1 Conducted disturbance

8.1.1 Signal line port

Measurement methods and limits are in accordance with the provisions of GB 9254.

8.1.2 Power supply port

Measurement methods and limits are in accordance with the provisions of GB 9254.

8.2 Radiation disturbance

Measurement methods and limits are in accordance with the provisions of GB 9254.

8.3 Harmonic current (AC power supply input port)

8.3.1 Measurement methods

For equipment with input current <= 16 A per phase, measure according to GB 17625.1.

For equip...

......