Internal Accessories
47
A charging status indication (contact accessible at terminal
point <LT4>) provides the capability to remotely monitor the
stored energy mechanism . The contact is “on” if the springs
are fully charged . The contact will be alternately “on” for 300
milliseconds and “off” for 300 milliseconds as the springs are
charging or until 20 seconds have elapsed, approximately
twice the time required to charge the springs. If the springs
are not charged after 20 seconds, the contact alternates
between 1 second “on” and 1 second “off,” indicating that
there is a problem. SB breakers with an electric operator may
be charged manually if the electric operator is disabled for
any reason.
Electric Motor Operator and Local Electric Close
Local Electric Close
The local electric close allows the user to electrically interlock
a local closing operation. It is available for breakers with either
the electric operator or remote closing solenoid. The local
electric close is commonly used in conjunction with a manual
close-blocking device (see Closing Blocking Device, page
68).
The electric close pushbutton switch is installed in the center
escutcheon of the front panel, directly below the push-to-
close button switch.
The Local Electric Close accessory is not field installable.
Electric Motor Operator Schematic Diagram
Electrical Test Information
1.) Attach test circuit to accessory leads. Apply rated
voltage to the LT1 and LT5 connections. The Electric
Operator should charge the breaker. During charging
the lamp connected to LT4 should flash . After charging
is complete the lamp connected to LT4 should remain
lighted.
NOTE: For Trouble Shooting Guide see page 97.
2.) With voltage applied to LT1 and LT5, apply voltage to
LT2. The breaker should close and the Electric Operator
should recharge the breaker spring.
3.) If the Electric Operator does not function properly during
check procedure check for incorrect installation or
wiring.
Courtesy of NationalSwitchgear.com
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