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Megabreak® - Maintenance guide
M
ain
tenanc
e guide
61
• Energized coils contacts (C-UVR, C-ST; C-CC)
Supply the UVR and check the continuity between (201-204)
Supply the ST and check the continuity between (211-214)
Supply the CC and check the continuity between (221-224)
If necessary replace the contact
• Trip Contact
Perform procedure PRT (trip Unit) and within trip test, check the continuity between (51-54)
If trip contacts doesn’t work, replace it by using procedure PMP3003 *
*procedure “PMP3003” can be used only By BTicino service or certified/qualified service companies
• Inserted/test/drawout contacts
Check the correct working of the contacts. Check the continuity with ohmmeter:
test position: continuity between T
11
-T
12
; T
21
-T
22
; T
31
-T
32
Inserted position: continuity between P
11
-P
12
; P
21
-P
22
; P
31
-P
32
Draw-out position: continuity between W
11
-W
12
; w
21
-w
22
; W
31
-W
32
If necessary replace the contacts
W11
T11
P11
W21
T21
P21
W31
T31
P31
W12
W14
T12
T14
P12
P14
W22
W24
T22
T24
P22
P24
W32
W34
T32
T34
P32
P34
52
51
C TR
54
202
204
212
214
222
201
211
221
224
C CC
C ST
C UVR
204
202
212
214
222
201
211
221
224
C CC
C ST
C UVR
UVR action signal
contact
ST action signal
contact
CC action signal
contact
W11
T11
P11
W21
T21
P21
W31
T31
P31
W12
W14
T12
T14
P12
P14
W22
W24
T22
T24
P22
P24
W32
W34
T32
T34
P32
P34
52
51
C TR
54
202
204
212
214
222
201
211
221
224
C CC
C ST
C UVR
TRIP SIGNAL