Chapter 10. Receiving Tests
M7IRDA2003I
7IRD-A/J/M: Distribution Protection & Control Terminal
© ZIV APLICACIONES Y TECNOLOGÍA, S.L.U. 2020
10-2
10.1
General
Improper handling of electrical equipment is extremely dangerous; therefore, only skilled and
qualified personnel familiar with appropriate safety procedures and precautions should work
with this equipment. Damage to equipment and injury to personnel can result when proper
safety precautions are not followed. The following general safety precautions are provided as a
reminder:
High magnitude voltages are present in auxiliary supply and metering circuits
even after
equipment has been disconnected
.
Equipment should be solidly
grounded
before handling or operating.
Under no circumstances should the
operating limits
of the equipment be exceeded
(auxiliary voltage, current, etc.).
The auxiliary supply voltage (AC or DC)
should be disconnected from the equipment
before extracting or inserting any module
, otherwise damage may result.
The number, the type and the specific characteristics of the acceptance tests are model
dependent and are detailed in the following table.
7IRD-B/T/V
Protection and
Control
Preliminary Inspection
Insulation Test
Power Supply Test
Protection
Metering Test
Phase and Ground Overcurrent Test
Open Phase Test
Residual Current Test
Breaker Failure Test
Recloser Test
Trip / Close Coil Circuit supervision input Test
Control
Test Control
Digital Inputs and LEDs Test
Digital Outputs Test
Metering Test
Communications
Communications Test
10.1.1
Accuracy
The Accuracy of the measuring instruments and test source signals (Auxiliary Power Supply
Voltage, AC Currents and AC Voltages) is fundamental in electrical testing. Therefore, the
information specified in the Technical Data section (2.1) of this manual can only be reasonably
verified with test equipment under normal reference conditions and with the tolerances indicated
in the UNE 21-136 and IEC 255 standards in addition to using precision instruments.
It is extremely important that there be little or no distortion (<2%) in the test source signals as
harmonics can affect internal measuring of the equipment. For example, distortions will affect
this IED, made up of non-linear elements, differently from an AC ammeter, because the
measurement is made differently in both cases.
It must be emphasized that the Accuracy of the test will depend on the instruments used for
measuring as well as the source signals used. Therefore, tests performed with secondary
equipment should focus on operation verification and not on measuring Accuracy.
