GE 239

GE Multilin 239 Motor Protection Relay 8-1
8 TESTING 8 TESTING
8
239 INSTRUCTION MANUAL 8 TESTING 8.1 PRIMARY INJECTION TESTING
Prior to relay commissioning at installation, complete system operation can be verified by injecting
current through the phase and ground CTs. To accomplish this, a primary high current injection test
set is required. Operation of the entire relay system, except the phase and ground CTs, can be
checked by applying input signals to the 239 from a secondary injection test set as described in the
following sections.
8.2 SECONDARY INJECTION TESTING
Setup the secondary injection test as shown in the figure below to perform the tests described in the
following sections. Tests should be performed to verify the correct operation and wiring. All functions
are firmware driven and this testing will verify correct firmware/hardware interaction.
Figure 8–1: SECONDARY INJECTION TEST SETUP