Siemens JFR Distribution Step Voltage Regulator 21-115532-001 - Manual (Page 15)

M A I N T E N A N C E
Page 11
GENERAL INSTRUCTIONS
This manual does not represent an exhaustive survey of
maintenance steps necessary to ensure safe operation of
the regulator. Particular applications may require further pro-
cedures. Should further information be desired or should
particular problems arise which are not covered sufficiently
for the purchaser’s purposes, the matter should be referred
to the local Siemens sales representative.
OPERATIONAL CHECKS
Basic regulator operation can be checked while the regulator
remains in service. The output voltage can be monitored from
the control panel display under the menu on the
“Vld” screen.
• Check the calibration by following the steps in the Basic
Troubleshooting section of the Accu/Stat control panel
instruction manual.
• Run the tapchanger several steps in one direction in the
manual mode until the output voltage is outside of the
bandwidth. Return the control to automatic mode. After the
predetermined time delay, the tapchanger motor will be
observed to return the output voltage in-band. Repeat this
operation, running the tapchanger in the opposite direction.
• Check the Vari-Amp
TM
limit switches by attempting to run the
tapchanger beyond the position to which the switches are
set. The limit switches should function to open the circuit.
Note: If the limit switch is set at the maximum 10% range and
fails to function, the tapchanger will stall against a mechanical
stop. The motor is designed to stall continuously without
damage.
WARNING
Failure to properly maintain the regulator can result in
serious injury, death, or equipment damage. The
instructions contained herein should be carefully
reviewed, understood and followed.
To prevent:
The following maintenance procedures should be
performed regularly:
1. Operational checks.
2. Periodic inspection.
Hazardous voltages. Will cause serious injury, death, or
equipment damage.
To prevent:
Always de-energize and ground the equipment before
maintenance requiring access to high voltage parts.
CAUTION
Operation of the regulator at extreme tap positions
could produce line voltages outside of operating limits
that could result in property damage.
To prevent:
Operate the regulator only to judiciously determined
voltage extremes.
WARNING
Regulator may have High Internal Pressure. Can cause
serious injury, death, or equipment damage.
To prevent:
Use pressure relief valve to vent regulator before
untanking.
WARNING
The use of unauthorized parts in the repair of the
equipment, tampering by unqualified personnel, or faulty
repair and adjustments can result in dangerous conditions
which can cause serious injury, death, or equipment
damage.
To prevent:
Follow all safety instructions contained herein, and contact
your local Siemens sales representative for replacement
parts.