13
1.3 Wiring
Purpose: Describes how to wire the TRTC UPS System.
Danger: The utility input power line must have circuit breaker or fuse protection as per the local
electrical code. It is referred as “Upstream Circuit Breaker” in this manual.
Before wiring the system, determine the size of the load:
START
TIP:
Each of the six contacts are of form C type, meaning Normally Open (NO), Common (C) and Normally Closed (NC)
dry contact rated for 1 Amp at 240VAC. Each of these contacts can be individually programmed to energize and stay
latched for ON BATTERY, LOW BATTERY, TIMER, ALARM, FAULT and many other conditions as described in
subsequent chapters. The ON BATTERY contact/(s) are activated as soon as the TRTC UPS is transferred to Battery
mode. LOW BATTERY contact/(s) are activated only in the Battery mode, as soon as the discharged battery reaches the
lower value battery capacity as set by user and remains latched as long as the system remains in Battery mode. The
TIMER contact/(s) are activated only in the Battery mode after the user-programmed time is attained, that can be set in
15 minutes interval from 15 minutes to 8 hours.
TIP:
Verify that all breakers, AC and battery breakers are OFF prior to wiring.
Go to Step 1
Is the load over
or under spec
capacity?
Put the Intersection in FLASH mode
as soon
as TRTC goes into Battery mode, by connecting
any one of the six programmed contacts to “
ON
BATT
” from C, NO or NC type at the TRTC to
the AUTO / FLASH circuit of any controller.
OVER
Run the intersection in FLASH mode connected as above
OR
Keep the intersection running normal in full phase until the
battery completely depletes down to shutdown resulting in
blackout
OR
Keep the intersection running normal in full phase for certain
time or until battery depletes down to certain capacity, both
of which are programmable. Run the intersection in flash
mode after that, until the battery depletes down completely
resulting in blackout if utility does not return. Connect Traffic
controller’s AUTO / FLASH circuit to any one of the six
programmable contacts on the TRTC programmed for the
“Timer” or “Low Battery”. This method is recommended to
ride out small power outages, which is what occurs during
most utility interruptions.
UNDER