Secheron UR46-81S, Instruction Manual

Page: 46 / 68

Trouble shooting UR46-81/82S
Document number: SG104148TEN Revision: B01 Issue date: 20.8.2012
Copyright© 2012 Sécheron SA - This document is not contractual and contains information corresponding to the level of technology at the date of release.
E-46
File: e-UR46-8S_trouble_en.fm
Type M closing device
Type E closing device
E.1.2 Auxiliary switches malfunctions
Defect Possible causes Remedies
A
The circuit-
breaker does not
maintain its
closed position.
Closing current too low:
I < I
min
1. Check the power of the alternating current
source.
2. Charge the batteries.
Closing pulse too short:
t < 0,5 s.
Modify the delay of the pulse (at drop-out).
Closing device gap too
wide.
Reduce the gap: see § E.2 procedure 2.
B
The closing
device does not
return to rest after
an opening by
Imax (direct or
indirect release)
followed by an
“off” order.
Pulse too short: t < 0,5 s. Modify the delay of the pulse (at drop-out).
Correct agreement
between the gap of the
device and the tripping
current out of range
(I < Imin. or I > Imax.).
1. Check the values of the tripping Rs resistor:
see § B.2.1 .
2. Check the presence and the values of the
parallel Rp resistor: see § B.2.1 .
Insert Rp if needed: see § B.2 .
3. Check if the closing coil has been dismantled.
In that case, it may have been improperly set
when reassembled: adjust the gap according
to §
E.2 procedure 3.
Do not change settings made by Sécheron.
DEFECT CAUSE REMEDY
C
The device does
not maintain its
closed position.
Closing current too low: < I
min
1. Check the power of the alternating
current source.
2. Charge the batteries.
Closing pulse too short: < 0,5 s. Modify the delay of the pulse (at drop-out).
Series connection of the
holding resistor:
1. without overlapping.
2. not available.
Verify and modify:
1. Delay.
2. Relaying.
Holding current too low:
< I
hold min
Verify and adjust holding resistor.
Gap too wide
Reduce the closing device gap: see § E.2
procedure 1.
D
The device does
not return to rest
after an opening
by Imax (direct or
indirect release)
and an “off” order.
Residual current in the closing
coil: I
≠
0.
Modify the control circuit to have
I = 0.
Gap too small.
Increase the gap: see § E.2 procedure 2.
If the device has been dismantled and then
improperly set: adjust the rated gap
according to §
E.2 procedure 3.
Defect Possible causes Remedies See §
Switch does not operate
Defective switch
Replace the switch E.4
One or more switches do not
operate Z clearance outside of
setting tolerances
Adjust the Z clearance D.6.5