Common Troubles And Trouble Shooting - ABB OVR-15 Instruction, Operation And Maintenance Manual

8
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OMMON TROUBLES AND TROUBLE SHOOTING
Table 4: Trouble shooting chart for OVR reclosers
approved/ as built wiring diagram)
Sr. Trouble /
No. Malfunction
Auxiliary Power
1
failure
ACM/RER615
does not power
up even after
main Aux. MCB
is ON & Aux
2
Supply is
available for
more than 60s
Recloser (AR) is
NOT ready;
OPEN & CLOSE
3
operations not
possible from
RER615 or from
remote
27 | P a g e
Indication /
Observation
No voltage across
auxiliary supply
terminals in LV Unit
Voltage is present
across auxiliary
power terminals in LV
Auxiliary Supply Mains MCB is
unit but cubicle light
OFF
& aux. power outlet,
heater(s), do not
have power.
If LED is not Glowing
Charging device is
defective ( its LED is
Check the resistance between
not glowing
NTC + & NTC – for the values
continuously)
in between 8 to 10 k.Ohm @
35⁰C Ambient.
MCB for ACM is OFF
None of the LEDs
(RED/GREEN) on
ACM glow
No LEDs on RER615
HMI glow and LCD
screen does not light
up
Manual Lock out activated.
Emergency manual trip (k69)
One or more blinking
handle has been operated and
RED LED on ACM
is locked in operated/tripped
position.
Control cable between LV & HV
units loose / not connected
AR Ready LED on
Relay glowing RED
Capacitors not sufficiently
charged
(Please read this table in conjunction with the
Possible Causes
- External Auxiliary power
connection to LV Unit is
loosely connected
- External Auxiliary Power
may be OFF
If LED is blinking.
OVR-15, 27 & 38 LV cabinet Instruction Manual
Remedy / Trouble Shooting
- Properly connect the Auxiliary
Power supply cable to the
plug inside LV Unit
- Check & correct the status of
the external power supply.
Switch ON the MCB for Auxiliary
Supply Mains
Charging device needs to be
reprogrammed.
Charging device is defective.
Consult ABB representative.
If found open or no values of
resistance could be measured,
temperature sensing cable is
defective. Consult ABB
representative.
Switch ON the MCB for ACM
Reset the emergency manual
trip handle & release the manual
lock out
Connect and secure the control
cable between HV & LV units
- Put selector switch in
DISCHARGE position
- Allow capacitors to fully
discharge (follow warning
label text guidelines)
- Check capacitor connections
to ACM for loose contact and
correct polarity as per wiring
diagram
- Check the capacitor health;
replace capacitors if needed