Operation
S&C Instruction Sheet 716-500 27
Understanding Trip-Free Operation
The stored-energy mechanism has an instantaneous trip-free
capability. If the Series 2000 Circuit-Switcher is closed into a
fault sensed by the user-furnished relaying, the mechanism
will immediately trip. To accomplish trip-free operation, the
stored-energy mechanism uses two spring assemblies: one
for closing and one for opening. Both springs are charged by
the operator motor before the circuit-switcher can be closed.
Recharging time after a trip operation is approximately
10 seconds for Model 2030 Circuit-Switchers rated 69 kV
through 138 kV and 16 seconds for circuit-switchers rated
161 kV and 230 kV.
Electrical Operation
To open the circuit-switcher, press the TRIP pushbutton or
send a remote trip signal to the switch operator. See Figure23
on page 22.
The opening latch in the stored-energy mechanism will
release, discharging the opening spring. This action trips the
interrupters and forces the opening and closing pistons in the
mechanism downward, which can be seen in the Discharged
indicator window inside the operator. See Figure 32. The
switch position indicator on the high-speed base will move to
the Open position. See Figure 33 on page 28. Further, if the
position-indicating lamp option (catalog number suffix“-M”)
has been specified, the green lamp will light.
The motor-driven cam in the stored-energy mechanism will
immediately start rising, thereby charging both the opening
and closing springs; when the opening spring latches, the
indicator will again be visible at the Charged window.
Stored
energy
indicator
Figure 32. A close up of the stored-energy mechanism indicator
CHARGED AND DISCHARGED.
To Next Page
Loading...
Need help?
General
