ABB UniGear Digital, Commissioning And Testing Manual, Page: 76 / 98

ESSAILEC TEST BLO CKS SECO NDARY TESTING O F PROTECTIO N R ELAYS
64 1VLG5000 17 C
6.1 ESSAILEC test blocks
ESSAILEC
®
test blocks are used for efficient testing of protection and control relay during
regular maintenance. The test blocks are flush mounting type on the low voltage compart-
ment door. The testing of protection and control relay's sensor inputs is possible without
opening the low voltage compartment door.
ESSAILEC® RJ45 test block
A test block is used for efficient testing of a protection and control relay with sensor inputs.
Vertical layout for the test block is recommended. One test block is intended for one phase
and it consists of a plug, a lid and a socket.
Figure 99: ESSAILEC ® RJ45 test block (the plug, the lid and the socket)
The socket is covered during Normal operation with the lid. For testing, the lid is removed
and replaced with the test plug.
Figure 100: Low Voltage Compartment door of UniGear panel with ESSAILEC
®
RJ45 test
blocks