4.6.3 Verifying Safety After Repair
Go through the following verification steps after performing repairs on the DGA monitor.
1. If you have replaced or altered any mechanical parts of the DGA monitor enclosure or
mounting accessories, verify that:
• Enclosure can be opened and closed normally.
• Enclosure tightness is maintained.
• All attachment points are intact.
2. If you have replaced any electrical components or wiring, verify that:
• All components that are secured to a DIN rail are firmly in place.
• There are no disconnected cables or loose wires.
• All grounding wires are attached.
• Wiring is done according to the wiring instructions in the
OPT100 Installation Guide
(M211857EN)
, unless intentionally altered by the repair procedure.
3. If you have replaced any of the oil handling components (pipes, valves, pump, oil block,
etc.) or opened any of the oil connections, verify that:
• There are no open oil connections.
• All oil handling components are securely attached.
• All oil leaks have been cleaned and wiped clean. No oil is visible on the parts or oil
connections.
4.6.4 Turning On DGA Monitor After Maintenance
If the circuit breakers will not stay in the ON position, turn off AC
power to the DGA monitor immediately and inspect the AC and DC power
wiring. The circuit breakers may be tripping because of a loose wire or incorrect
connection.
CAUTION!
1. Verify that the circuit breakers
Main
and
Heat
inside the DGA monitor are turned on.
2. Turn on DC power inside the power supply unit:
a. Open the power supply unit enclosure.
b. Turn on circuit breaker
F1
.
c. Turn on switch
S1
.
3. Turn on AC power to the DGA monitor:
a. Check if there are any warning labels attached to the disconnection device. If there
are, make sure it is safe to turn on the AC power. Remove any labels that are now
unnecessary.
b. If the external disconnection device is locked in the off position, unlock it.
c. Turn on AC power from the external disconnection device.
OPT100 User Guide
M211858EN-E
46
Summary of Contents for Optimus OPT100
Page 1: ...M211858EN E User Guide Vaisala Optimus DGA Monitor for Transformers OPT100...
Page 24: ...Figure 11 Measurement Graph for 1 Day Rate of Change Values OPT100 User Guide M211858EN E 22...
Page 72: ...OPT100 User Guide M211858EN E 70...
Page 76: ...OPT100 User Guide M211858EN E 74...
Page 77: ......
Page 78: ...www vaisala com...