3.4
SEL-2032 Communications Processor Instruction Manual Date Code 20120126
Job Done Examples
Example 2: Using the SEL-2032 as a Port Switch
Example 2: Using the SEL-2032 as a Port Switch
Introduction
This example assumes your substation has an SEL-2032, seven SEL-251
Relays, an IRIG-B source, and a telephone line. Also, you have SEL-C239
cables of the appropriate length to connect the SEL-2032 to each relay. You
have a PC or terminal and an SEL C234A cable to communicate with the
SEL-2032. You will connect all of these as shown in Figure 3.4.
Figure 3.4 SEL-2032 Configured With SEL-251 Relays, External Modem,
and IRIG-B Source
Identifying
the Problem
Your objective in Example 2 is to accomplish the following tasks:
➤ You want the SEL-2032 to time synchronize all IEDs with the
IRIG-B source.
➤ You want to send date messages to the relays even though they
receive IRIG-B time code, so if power is cycled on a relay, the
appropriate date (including year) is available as a reference.
➤ You want to access information in all the IEDs through the
telephone port.
Defining
the Solution
Complete Hardware Connections
Step 1. Connect each SEL-251 as follows:
a. On the relay, install cable SEL-C239 connectors to
Port 2R and AUX INPUT.
b. Plug the other end of cable SEL-C239 into the desired
SEL-2032 serial port.
SEL-251
Relay
Time
Clock
SEL-251
Relay
SEL-251
Relay
SEL-251
Relay
SEL-251
Relay
SEL-251
Relay
SEL-251
Relay
Local
Terminal
IRIG-B
Input
Port 7Port 6Port 5Port 4Port 3Port 2Port 1
SEL-2032
Port FPort 9
Aux.
Input
Aux.
Input
Aux.
Input
Aux.
Input
Aux.
Input
Aux.
Input
Aux.
Input
Port 2R
Cable
SEL-C234A
Modem
Cable
SEL-C226
Port 2R Port 2R
Port 2R Port 2R Port 2R Port 2R
All relay
cables
SEL-C239
Telephone
Line
Courtesy of NationalSwitchgear.com
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