Chapter 10. Receiving Tests
10-3
M7IRDA2003I
7IRD-A/J/M: Distribution Protection & Control Terminal
© ZIV APLICACIONES Y TECNOLOGÍA, S.L.U. 2020
10.2
Preliminary Inspection
Examine the following aspects to conduct the Preliminary Inspection:
The relay is found in perfect physical condition, all of the parts are securely attached
and no assembly fasteners are missing.
The model numbers and specifications agree with the equipment order.
10.3
Isolation Test
During Isolation Tests, if the integrity of the external cable harness is to be checked, remove the
connectors from the equipment. This will avoid possible damage to the connectors if the test is
not performed properly or if a short exists in the harness. Isolation Tests have already been
performed at the factory.
Common Mode
Short-circuit all of the terminals of the unit except those that relate to the power source from the
Protection and Control Subsystem and the Measurement Coil Circuit, for example: (C1, C2,
C3); (K1, K2, K3) and (Z1, Z2, Z3). Also the ground terminal of the casing should be
disconnected. Then apply 2,000 Vac, during 1 min., between the interconnected terminals and
metal case.
CAUTION: Internal capacitors exist that can generate a high voltage if you take away the
isolation test probes without lowering the test voltage.
10.4
Power Supply Test
Connect the Power Supply as indicated in the following table. The signed contacts are for
equipment with a Protection Coil Circuit, a Control Coil Circuit one and a Measurement one. For
another type of equipment will be necessary to check its external connection schemes.
Table 10-1:Power Supply Test
Model
VDC PROT
VDC CONT
VDC MET.
CON1P
CON2P
CON 1C
CON 2C
7IRD-A/J/M C3(+) C2(-)
K3(+) K2(-)
Z3(+) Z2(-)
C6 - C4
C6 - C5
K6 - K4
K6 - K5
F3(+) F2(-)
F6 - F4
F6 - F5
Test that when the equipment is found without power, the contacts designated by CON 2P and
CON 2C in the table above are closed and the contacts designated by CON 1P and CON1C are
open. Apply nominal power to the Protection Subsystem and test to see that the state of the
contacts for CON1P and CON2P change and that the LED
Ready
is on. Apply nominal power
to the Control Subsystem and test to see that the state of the contacts for CON1C and CON2C
change and that the LED
Ready
is on.
