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Instruction Manual for HV Unit of OVR-15, 27 & 38
Detailed descriptions of standard repair procedures, safety principles, and service operations are not
included. It is important to note that this document contains some warnings and cautions against some
specific service methods that could cause personal injury to service personnel or could damage
equipment or render it unsafe. These warnings do not cover every conceivable method in which service
(whether or not recommended by ABB) may be performed.
Secondly, ABB cannot predict or investigate all potential hazards resulting from all conceivable service
methods. Anyone using service procedures or tools, whether or not recommended by ABB, must be
completely certain that both their personal safety and the safety of the equipment will not be jeopardized
by the service method or tools selected.
All information contained in this manual is based on the latest product information available at the time
of printing. The right is reserved to make changes at any time without notice.
Also, as improvements in assemblies and parts are made, some parts may differ in appearance that
depicted in illustrations; however, functionality will be equivalent.
F. WORKING ON HV CABINETS AND MANDATORY SAFETY
PROCEDURES.
Whenever it is required to work on HV &/or LV units, it is mandatory to follow following minimum
procedures:
a. Isolate the recloser from power system on its both sides. Put recloser in OPEN condition by
operating the emergency manual trip handle (yellow handle).
Once recloser is opened, the handle gets locked & blocks close operation both electrically &
mechanically till the handle is reset to its original (not operated) position.
b. Confirm the OPEN status of the recloser from the mechanical ON/OFF indicator, from SLD on LCD
display & the indication LEDs on RER615 HMI.
c. Always put the SERVICE /DISCHARGE selector switch in the LV cabinet to DISCHARGE position.
d. Follow the safety warning instructions on various warning labels provided on the LV & HV units
e. Remove the control cable from both HV & LV cabinets & cover the 24 pin male connectors by plastic
caps provided.
Although warning hazards are related to personal injury, it is necessary to understand that under certain
operational conditions, operation of damaged equipment may result in degraded process performance
leading to personal injury or death. Therefore, comply fully with all warning and caution notices.
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