High Speed DC Circuit Breaker - G E Power Controls
High Speed DC Circuit Breaker - G E Power Controls
High Speed DC Circuit Breaker - G E Power Controls
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1.2 Safety hints<br />
1.2.1 Securing against falling parts<br />
Hint 1: Place a cloth into the lower area of the pre-arcing<br />
contact [Fig. 1]. Remember to secure the closing drive<br />
according to Hint 3.<br />
2. General usage conditions<br />
2.1 Transportation<br />
• The breaker is transported on wooden palette. It is fixed<br />
by shrunken plastic film. A paper cardboard box covers<br />
the breaker on the palette. Truck, railway, airplane and<br />
ship transport is possible. In case of sea transport, special<br />
protection against salty and humid environment is<br />
used.<br />
• The circuit breaker must always be transported to the<br />
installation site vertically and fully packed. The packaging<br />
protects the device against damage and dust; it<br />
should only be removed prior to installation.<br />
• If the packaging is damaged, the breaker and the arc<br />
chute must be inspected for damage. Ensure that all<br />
packaging materials have been carefully removed prior<br />
to breaker installation.<br />
• For handling the unpacked breaker [Fig. 3], use a transportation<br />
belts and reach them below the closing drive<br />
(a) and below the lower terminal (b).<br />
• Listen, that the basement isolation of the unpacked<br />
breaker during handling will not be damaged (for example<br />
don’t push the breaker back and forth at rough surface).<br />
Fig.1 Protecting of the arcing area aginst falling parts<br />
1.2.2 Maintenance with zero voltage release<br />
Hint 2: In case, when the zero voltage release is installed<br />
in, it shall be energized to enable closing of the breaker.<br />
Only then maintenance of the pre-arcing contacts is<br />
possible.<br />
Hint 3: To prevent the risk of injury, it is recommended to<br />
secure the close position of the breaker with a mechanical<br />
interlock device [Fig. 2]. The tube shall have ~50mm<br />
[~2in] length and inner diameter of minimum 14mm<br />
[0,55in]. The outer diameter of the locking rod shall be<br />
less 8mm [0,3in]. GE does not offer this locking device.<br />
a<br />
b<br />
Closing drive<br />
Secure tube<br />
Locking rod<br />
SW 6<br />
Fig. 2 Securing closing drive against opening<br />
Fig. 3 Handling the breaker and setting of the OCT unit<br />
4 Design and specifications are subject to change without notice S47183-e 01/2008