TERASAKI TemPower2 AR-E Series, Instruction Manual

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KRB-5368c
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Table 22 Detailed inspection procedure
Check point No. Check item Description
Latch release
coil (LRC)
See 6-2-3.
1 Coil resistance
Disconnect hand connector (green) that is closer to coil than the other and, using tester, measure coil
resistance between terminals and make sure it is within range specified in Table 9. (*3) If not so,
replace LRC.
2 Length and
stroke of plunger
Remove LRC and, using vernier caliper, make sure plunger length is 24.2 - 24.8 mm in natural state
and protrusion of plunger is 6.3 - 7 mm when moving core is pushed in. If not so, replace LRC.
3 Hand connector
Check that hand connector (green) is connected to ACB hand connector (green) correctly. If
incorrect, connect correctly.
4 Looseness of
screws
Check LRC mounting screws for looseness. If loose, retighten.
5 Mechanical
motion
With closing springs charged, check that pushing moving core results in ACB being closed slowly,
and releasing moving core results in the core being restored smoothly. If not so, replace LRC. If it is
useless to replace LRC, contact us. After inspection, open ACB and discharge closing springs.
Instantaneously
-rated shunt trip
device (SHT)
See 6-2-4.
6 Coil resistance
Disconnect hand connector (black) that is closer to coil than the other and, using tester, measure coil
resistance between terminals and make sure it is within range specified in Table 10. (*3) If not so,
replace SHT.
7 Length and
stroke of plunger
Remove SHT and, using vernier caliper, make sure plunger length is 24.7 – 25.3 mm in natural state
and protrusion of plunger is 6.7 – 7.3 mm when moving core is pushed in. If not so, replace SHT.
8 Hand connector
Check that hand connector (black) is connected to ACB hand connector (black) correctly. If incorrect,
connect correctly.
9 Looseness of
screws
Check SHT mounting screws for looseness. If loose, retighten.
10 Mechanical
motion
With ACB closed, check that pushing moving core results in ACB being opened slowly, and releasing
moving core results in the core being restored smoothly. If not so, replace SHT. If it is useless to
replace SHT, contact us. After inspection, discharge closing springs.
Undervoltage
trip device
(UVT)
See 6-2-1.
11 Coil resistance
Disconnect hand connector (red) and, using tester, measure coil resistance between terminals and
make sure holding coil is rated at 330 - 420 Ω . (*3) If not so, replace UVT.
12 Operation
Remove UVT and press in plunger, and make sure releasing plunger causes plunger to be smoothly
restored. If not so, replace UVT.
13 Length and
stroke of plunger
Remove UVT and, using vernier caliper, make sure plunger length is 32.7 - 33.3mm in natural state
and plunger stroke is 6.7 - 7.3 mm. If not so, replace UVT.
14 Hand connector
Check that hand connector (red) is connected to ACB hand connector (red) correctly. If incorrect ,
connect correctly.
15 Looseness of
screws
Check UVT mounting screws for looseness. If loose, retighten.
Magnet hold
trigger (MHT)
See 6-2-6.
16 Coil resistance
Disconnect hand connector (red) and, using tester, measure coil resistance between terminals and
make sure it is 1.8 - 2.2 Ω . (*3) If not so, replace MHT.
17 Operation
Remove MHT and pull out moving core slowly, and make sure pushing moving core allows core to be
smoothly retracted and attracted If not so, replace MHT.
18
Length and
stroke of moving
core
Remove MHT and, using vernier caliper, make sure protrusion of moving core is 6.7 - 7.3mm in
pulled-out state. If not so, replace MHT.
19 Hand connector
Check that hand connector (red) is connected to ACB hand connector (red) correctly. If incorrect ,
connect correctly.
20 Looseness of
screws
Check MHT mounting screws for looseness. If loose, retighten.
Charging motor
and LRC
21 Electrical
operation
With breaker body assembled to original state, supply ACB with operation power, and attempt to
perform motor charging and electrical closing operation with max. and min. voltages within
permissible charging/closing voltage range to make sure ACB operates normally. (See Table 9). If
ACB does not operate normally, contact us.
SHT 22 Electrical
operation
With breaker body assembled to original state, close ACB, supply SHT with power, and attempt to
perform electrical opening operation with max. and min. voltages within permissible closing voltage
range to make sure ACB trips open normally. (See Table 10). If ACB does not trip open, contact us.
UVT 23 Electrical
operation
With breaker body assembled to original state, charge closing springs, and make sure that ACB
closes when UVT is supplied with attraction power. And decrease UVT supply voltage to make sure
ACB opening voltage is within specified opening voltage range. (See Table 11.) If ACB does not
operate normally, contact us.
OCR and MHT 24 Operation
With breaker body assembled to original state, check OCR and MHT with type ANS2S OCR test
interface unit (optional) to make sure ACB operates normally. If ACB does not operate normally,
contact us.

Always check the "General" items in Table 21 during the inspection procedure shown in Table 22 above.
*3 Take care to avoid damaging or deforming terminal pins when bringing tester lead into contact with them.