User's Manual
381333-395 Operation 2-2
Controller Settings for MV ATSs
The Group 5 Controller is factory set for medium-
voltage operation. These are the special settings:
Controller Voltage Jumper Blocks
The control voltage is typically stepped down to 120V,
so the eight jumper blocks are factory arranged
horizontally for 120 V input.
Controller Menu Settings
ATS Information Rating is 1200, 2000, or 3000 A
The ATS information rating setting is 1200A, 2000A,
or 3000A.
ATS Information is Circuit Breaker Non Bypass
The ATS information type setting is BRKR NBPS.
Lock-Out Relay (optional)
If an optional protective relay (device) is ordered for
the normal and/or emergency source circuit breaker, a
Lock-Out Relay (LOR) is provided on the appropriate
circuit breaker compartment door. The LOR responds
to a signal from a protective relay and in turn trips the
appropriate circuit breaker. The LOR locks out the
circuit breaker until the fault is cleared and the
protective relay and LOR has been reset. A red light
and orange window shows tripped.
Breaker Control Tripped Light (opt.)
If an optional protective relay (device) is ordered, the
BREAKER CONTROL switch has a center amber
TRIPPED light. This light comes on if the CB has
been tripped by the LOR.
Refer to the Group 5 Controller User’s Guide
381333-126 for ATS status display messages, time
delays, pickup & dropout settings, & adjustments.
Optional circuit breaker
tripped light
amber=CB tripped open
Lock-Out Relay
status lights
green=ready to respond
red=trip signal sent to CB
Status window
black=ready to respond
orange=trip signal sent to CB
Fi
g
ure 2-3. Lock-Out Rela
y
Figure 2-4. Breaker Control Tripped light
What to do if a circuit breaker trips
1. Check the protective relay and determine the
cause of the trip. Refer to device’s instructions.
After fault is cleared, reset the protective relay.
2. Reset the Lock-Out Relay by turning it to RESET.
3. Turn the Breaker Control switch to CLOSE.
4. Press the Alarm Reset button. The circuit breaker
should close if its connected source is selected by
the controller to serve the load.