1.
4
1.4-04
BREAKER
ୟഗ
֡ፕ
2/5/5!ୟഗਸ֡ፕ
ጀᅪǖසࡕୟഗยԢLjยԢࣷሞԿࢇई၄גࡗҾ
ጎڦԍࢺጎዃยۨኵڦࠤቱ้ጲۯཌቄăDŽۉጱྃ੩ഗDž
֑ᆩܠዖݛ݆ਸୟഗă
ۯ
๑ᆩݴቄӀ౧DŽ!2/1ODžਸୟഗă
ݴྃ੩ഗ
ᅜҾጎݴྃ੩ഗᅜਸୟഗă֑ᆩݛ้݆LjՂႷ
ཚࡗْܾਸDŽ܋ጱDžྺݴྃ੩ഗཚۉă
വۉუྃ੩ഗ
ᅜҾጎവۉუྃ੩ഗᅜՍሞഄۉᇸۉუইڟᅃۨኵᅜူ
้ਸୟഗă
ُྔLj࣏๑ᆩܠ߲ాևࢅྔևୟഗጎዃLjኄၵጎ
ዃ٪ሞժघऄ้ࣷਸୟഗă
2/5/6!ൽୟഗ
ጚԢ
lj!ዐႠटۉୁࢻߌഗ
๑ᆩথںᆅ၍ۉୁࢻߌഗDŽದᆶԢᆩথںࠤቱጎዃDž้Lj
থںᆅ၍ۉୁࢻߌഗࣷሞୟഗٗ؏ॐዐൽ้ਸۉ
ୟăగၵ൧ူLjۉୁీሞথںጎዃዐᅈ٪ሞLjሞۉ
ୁࢻߌഗْܾ܋ጱฉׂิߛߌᆌۉუă
ኄၵ൧ူLjᄲඓԍ؏ॐฉҾጎᆶୟഗ࿋ዃਸ࠲DŽ֖९!
5/5বDžLj๑ۉୁࢻߌഗْܾ܋ጱሞୟഗԥൽ้܌ୟă
lj!ۉۯऐئీ
සࡕҾጎᆶऐۯࣅڑࣟئీڇᇮLj൩ॽୟഗۙবڟਸ
࿋ዃLjࢫԿࢇୟഗLj๑ഄཌቄᅜݣԿࢇڑࣟڦئ
ీă
1.4.4 Circuit Breaker Opening Opera
Ɵ
on
NOTICE: If the device is a breaker it will always AUTOMATICALLY
Trip on closing or being exposed to faults that exceed the values
set or installed on the installed protec
Ɵ
ve devices. (GT type
Electronic Trip Unit).
There are mul
Ɵ
ple means to open the breaker.
Manually
Using the o
ī
Pushbu
Ʃ
on (Fig. 1.0N) will open the breaker.
Shunt release
Shunt releases can be installed to open the breaker. For this the
shunt releases must be energized via the secondary disconnect
(terminals).
Undervoltage release
Undervoltage releases can be installed and will open the
breaker once their power supply drops below a certain level.
Addi
Ɵ
onally mul
Ɵ
ple in- and external breaker interlocking
facili
Ɵ
es are available that, if present and ac
Ɵ
ve, will open the
device.
1.4.5 Circuit Breaker Withdrawal
Prepara
Ɵ
on
- Neutral Pole Current Transformer
When using a ground leg current transformer (supplied with
standby ground fault), the ground leg current transformer will
be open circuited when the circuit breaker is withdrawn from its
casse
Ʃ
e. Under certain circumstances, the current may s
Ɵ
ll
Ň
ow
in the ground giving rise to a high induced voltage at the current
transformer secondary terminals.
Under such condi
Ɵ
ons, ensure a Carriage Switch is installed in
the casse
Ʃ
e (see Sec
Ɵ
on 4.4) to allow short circui
Ɵ
ng of the
current transformer secondary terminals when the circuit
breaker is withdrawn.
- Motor operator
If a motorized spring charging unit is installed
rack the breaker to the disconnect posi
Ɵ
on, then
close and trip the breaker to discharge the
closing springs.
য়ߢ0
WARNING
ඓԍୟഗᅙཌቄLj!ኸ๖ྺ!P!G!G!DŽ!ݴቄDžLjዷڑࣟ
ئీᅙྜඇݣă
Ensure the circuit breaker has been tripped, indica
Ɵ
ng
OFF, and the main springs are fully discharged.
NF1:ဣଚگუഘୟഗ
