Inspection Frequency
The scheduled maintenance interval for the VR-Series
+
circuit breaker is once every ten years or ten thousand
operations, whichever comes first when applied in
normal applications as defined by IEEE C37.04-1999.
However, if the circuit breaker is operating in a high
level of natural elements or in a corrosive environment,
inspection should be performed twice each year. The
circuit breaker should also be inspected and a vacuum
interrupter integrity test performed (Vacuum Interrupter
Integrity Test) any time the circuit breaker is transported
to another physical location or switchgear assembly. In
addition, the circuit breaker should have a full inspection
if the circuit breaker interrupts a fault current.
Maintenance Recommendation
The VR-Series
+
circuit breaker is lubricated during
assembly with a long lasting synthetic lubricant. When
applied in “usual service conditions” as defined by IEEE
C37.04-1999, the VR-Series
+
circuit breaker element
requires maintenance only once every ten years or ten
thousand operations, which ever comes first.
After a ten year service interval or when ten thousand
operations have been reached, contact your local Eaton
representative to arrange for factory recertification.
During the ten year service interval, no supplemental
lubrication with light machine oil is recommended.
Machine oil may be incompatible with the advanced
lubricant in the VR-Series
+
vacuum replacement circuit
breaker and will damage the components of the stored
energy mechanism.
Maintenance and
Troubleshooting
NO. / SECTION INSPECTION ITEM CRITERIA INSPECTION METHOD CORRECTIVE ACTION IF NECESSARY
1. Insulation Stand Off Insulators, Operating
Rods, Tie-Bars and Barriers
No dirt Visual check Clean with lint-free cloth
No cracking Visual check Replace cracked unit
Vacuum Integrity Between Main Circuit with
Terminals Ungrounded
Withstand
27k 60Hz for 1 minute
Hi-pot Tester Clean and retest or replace
Insulation Integrity Main Circuit to Ground Withstand
15kV, 60Hz for 1 minute
(5kV Rating)
27kV, 60Hz for 1 minute
(8.25kV and 15kV ratings)
Hi-pot Tester Clean and retest or replace
Control Circuit to Ground
(Charging Motor Disconnected)
Withstand
1125V, 60Hz for 1 minute
Hi-pot Tester Clean and retest or replace
2. Power Element Vacuum Interrupter Assembly Contact erosion visibility Visual - Close the circuit breaker and
look for for “T” cutout on Vacuum
Interrupter Assembly
(See “Vacuum Bottle Contact
Inspection” section)
If cutout is not visible, replace Vacuum
Interrupter Assembly
Contact wipe visible Visual (See “Vacuum Bottle Contact
Inspection” section)
Replace Vacuum Interrupter Assembly
Adequate vacuum Reference “Vacuum Bottle Contact
Inspection” section
Replace Vacuum Interrupter Assembly
If vacuum is not adequate
Dirt on ceramic body Visual check Clean with dry lint-free cloth
Primary Disconnects No burning or damage Visual check Replace if burned, damaged or eroded
3. Control Circuit Parts Closing and Tripping Devices
Including Disconnects
Smooth and correct operation by
control power
Test closing and tripping of the circuit
breaker twice
Replace any defective device-
Identify per Trouble-Shooting Chart
Wiring Securely tied in proper place Visual check Repair or tie as necessary
Terminals Tight Visual check Tighten or replace if necessary
Motor Smooth and correct operation by
control power
Test closing and tripping of the circuit
breaker twice
Replace brushes or motor
Tightness of Hardware No loose or missing parts Visual and tightening with appropriate
tools
Tighten or reinstate if necessary
4. Operating Mechanism Dust or Foreign Matter No dust or foreign matter Visual check Clean as necessary
Deformation or Excessive Wear No excessive deformation or wear Visual and operational Remove cause and replace parts
Manual Operation Smooth operation Manual charging closing
and tripping
Correct per Trouble-Shooting Chart
if necessary
CloSure
™
Test > 0.6 inch over travel Reference CloSure
™
Test If < 0.6 contact P.B.C.
at 1-877-276-9379
8
EATON | Visual Instruction Booklet Essentials | November 2018
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