Date Code 20020129
Installation
2-5
SEL-387E Instruction Manual
R
EAR
-P
ANEL
C
ONNECTIONS
We provide two options for secure connection of wiring to the relay rear panel. One of these is
the conventional terminal block, in which you use size #6–32 screws to secure rear-panel wiring.
The other option uses plug-in (Connectorized) connections that offer robust connections while
minimizing installation and replacement time.
Connectorized rear-panel connections reduce repair time dramatically in the unlikely event that a
relay should fail. These connections greatly simplify routine bench testing; connecting and
disconnecting rear-panel wiring takes only a few minutes.
Connectorized relays use a current shorting connector for current inputs, a plug-in terminal block
that provides maximum wiring flexibility for inputs and outputs, and a quick disconnect
voltage-rated connector for voltage inputs. The manufacturers of these connectors have tested
them thoroughly, and many industry applications have proven the performance of these
connectors. In addition, we have tested these connectors thoroughly to ensure that they conform
to our standards for protective relay applications.
Terminal Block
Make terminal block connections with size #6–32 screws using a Phillips or slotted screwdriver.
You may request locking screws from the factory. Refer to Figure 2.4 and Figure 2.5 to make all
terminal block connections.
Connectorized
To use the Connectorized version of the SEL-387E Relay, ask your SEL sales or customer
service representative for the appropriate model option table and order wiring harness kit
WA0387E0YxxxA, where x designates wire sizes and length. You can find the model option
table on the SEL Web site at http://www.selinc.com. Refer to Figure 2.6 to make all
Connectorized connections.
