Rockwell Automation 1608P-200A480V... HC-DySC User Manual - Manual (Page 36)

36 Rockwell Automation Publication 1608P-UM005A-EN-P - November 2014
Chapter 6 Maintenance
Servicing
Before attempting any servicing that requires opening the HC-DySC doors first
put the system into
Bypass (maintenance) mode as described in Maintenance
Bypass Transfer Procedure on page 18 .
CBI Circuit Breaker, Safety Interlocks and Stored Energy
The HC-DySC includes a fast-discharge circuit to quickly dissipate stored
energy when the CBI circuit breaker is opened. Always follow the
Maintenance
Bypass Transfer Procedure on page 18 to close the CBB circuit breaker before
opening the CBI circuit breaker. Failure to follow these instructions may result in
load power interruption.
If the upstream power is interrupted before CBI is opened the fast-discharge
circuit will not be triggered. In that case wait at least 30 minutes before opening
the HC-DySC doors to avoid exposure to charged capacitors. High voltage
remains on capacitors if the red LED indicators above the power module
capacitor banks are lighted.
HC-DySC Fuses
Fast-acting fuses are included to protect the HC-DySC in the event of a load
short circuit condition. If the system is found to be offline and the display shows
an “Open Fuse” alarm then a load short circuit may have occurred. If there is no
output voltage present and the display is off, it is an indication that an upstream
protection device has opened. If the bypass circuit breaker CBB opens due to an
overcurrent condition, it will need to be manually reset. Pump the spring
charging handle on the CBB motor operator until it indicates that the spring is
charged. CBB may automatically close once it is reset.
ATTENTION: Service must be performed by qualified personnel only.
WARNING: Turn the power to the HC-DySC electronics off by placing the
HC-DySC Switch into BYPASS or opening the branch circuit breaker before
replacing any fuse. Failure to comply with this warning can result in injury or
death.
WARNING: The HC-DySC has high voltage remaining up to 30 minutes after
disconnection from the AC line. Touching exposed or disconnected terminals,
cables or parts of the HC-DySC can lead to serious injuries or even death. Wait
for a minimum of 5 minutes before performing any service or testing on the HC-
DySC after power is removed. Keep doors closed until all internal LED indicators
are extinguished.
WARNING: Keep the cabinet doors closed to ensure proper cooling airflow and
to protect personnel from dangerous voltages inside the HC-DySC