8.8
SEL-749M Relay Instruction Manual Date Code 20080918
Front-Panel Operations
Human-Machine Interface
Start Motor Asserts Relay Word STR to initiate a motor start (see
Figure 4.23)
Output Contacts Use the Output Contacts menu item to test
SEL-749M output contacts and associated circuits. You can pulse the
selected Relay Word bit associated with the contact outputs from this
menu (see Figure 4.32 for a typical output logic).
Reset TCU: Resets the thermal capacity used (see Thermal
Overload Element on page 4.4 for description).
Set/Show Menu
The SEL-749M settings are arranged in easy-to-understand categories. The
settings structure simplifies relay setting. Access the settings class (relay,
global, port, or front-panel) required by performing the following steps, which
are similar to the entry of the appropriate SET/SHOW command:
Step 1. Select the
Set/Show menu item on the MAIN menu to view or
modify the settings (refer to SEL-749M Menu Structure on
page 8.5).
Step 2. Select the settings class, date/time, or password settings from
the
SET/SHOW menu.
Each settings class includes headings that create subgroups of associated
settings. These headings are displayed in the settings screen captures in
Section 6: Settings. Select the heading that contains the setting of interest. An
example of the
RELAY headings is shown in Figure 8.6.
Figure 8.6 RELAY Heading Example
Navigate to the setting of interest. View or edit the setting by pressing {ENT}.
For text settings, use the four navigation pushbuttons to scroll through
available alphanumeric and special character settings. For numeric settings,
Press the {ENT} pushbutton to pulse the out-
put.
The LCD displays a password screen if a
password is required. Enter your Level 2
password.
Press the {Right Arrow}
to select
Yes and then press {ENT}.
OUTPUT CONTACTS
Pulse OUT101
Password=
Del Clr Accept
Pulse OUT101
No Yes
RELAY
Main Settings
RID
TID
CTR1
FLA1
...
Courtesy of NationalSwitchgear.com
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