High Speed DC Circuit Breaker - G E Power Controls

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1.2 Safety hints 1.2.1 Securing against falling parts Hint 1: Place a cloth into the lower area of the pre-arcing contact [Fig. 1]. Remember to secure the closing drive according to Hint 3. 2. General usage conditions 2.1 Transportation • The breaker is transported on wooden palette. It is fixed by shrunken plastic film. A paper cardboard box covers the breaker on the palette. Truck, railway, airplane and ship transport is possible. In case of sea transport, special protection against salty and humid environment is used. • The circuit breaker must always be transported to the installation site vertically and fully packed. The packaging protects the device against damage and dust; it should only be removed prior to installation. • If the packaging is damaged, the breaker and the arc chute must be inspected for damage. Ensure that all packaging materials have been carefully removed prior to breaker installation. • For handling the unpacked breaker [Fig. 3], use a transportation belts and reach them below the closing drive (a) and below the lower terminal (b). • Listen, that the basement isolation of the unpacked breaker during handling will not be damaged (for example don’t push the breaker back and forth at rough surface). Fig.1 Protecting of the arcing area aginst falling parts 1.2.2 Maintenance with zero voltage release Hint 2: In case, when the zero voltage release is installed in, it shall be energized to enable closing of the breaker. Only then maintenance of the pre-arcing contacts is possible. Hint 3: To prevent the risk of injury, it is recommended to secure the close position of the breaker with a mechanical interlock device [Fig. 2]. The tube shall have ~50mm [~2in] length and inner diameter of minimum 14mm [0,55in]. The outer diameter of the locking rod shall be less 8mm [0,3in]. GE does not offer this locking device. a b Closing drive Secure tube Locking rod SW 6 Fig. 2 Securing closing drive against opening Fig. 3 Handling the breaker and setting of the OCT unit 4 Design and specifications are subject to change without notice S47183-e 01/2008
2.2 Installation 2.2.1 Operational environment • The breaker, as delivered, is IP00 protected. It is intended to work in indoor applications, without pollutions, with non-conductive dust, protected against high humidity and condensation. Low conductivity dust deposit due to frequent condensation of humidity is acceptable. General environmental conditions refer to EN 50123-1 - annex B, and IEC60947, class PD3. • The breaker can operate within ambient temperature range of –5°C…+40°C (23...104°F). With decreased nominal current, breaker can operate up to +60°C (140°F). • The breaker can operate at altitude up to 2000m (~6500ft). • The breaker shall not be subjected to strong vibrations. Vibrations of 0.5g per 30sec in vertical and horizontal directions are allowed. • Air shall be clean and its relative humidity shall be not more than 50 % r.h. at the maximum temperature of +40°C (104°F). Relative humidity may be higher if the temperatures are lower, for example, 90 %r.h. at +20°C (68°F). Slight condensation might occur during variations of temperature 2.2.2 Installation and interfaces • The lower and upper connections (code nr: 4) must be connected directly to the main cables or bus bars. The breaker must only be used in an upright operation position with the arc chute in place and fully secured. • After installation, both the arc chute and special threaded joints must be checked for tightness. • The safety distances as shown in the dimensional drawings must be maintained to grounded or insulated parts. Suitable measures must be taken to protect personnel from arcs. • Strong, external magnetic fields, caused by improperly located supply conductors or tray fields from other devices, can lead to a shift of the trip setting thresholds. This may result in premature tripping, or no tripping at al, during low-level short circuit current events. This has to be accounted for when installing and operating the device with shielding added if appropriate. • The control wires must be connected to the control terminals (code nr: 19), as shown in the schematic circuit diagram (Page 14). The protective grounding wire must be connected at the marked contact. 2.3 Usage 2.3.1 Supply and load • In accordance with its type, the breaker has been designed for the current and voltage listed in Table 1, section 3.3. • During continuous operation, breaker must be loaded with its rated current at maximum. Load currents in excess of breaker nameplate rating are allowable for brief periods. Refer to the short time currents listed in Tables 1a/1b. • Do not exceed the rated operating voltage shown on the breaker’s nameplate. • The drive and the auxiliary tripping devices (code nr: 8). shall be supply within the specified control voltage range. The auxiliary-tripping devices must be loaded with the values listed in Table 2a at maximum. • Plugging or removing the auxiliary current connectors are only allowed at zero potential, no voltage (-X2 :1/:2) (-X3 :4/:5) ! 2.3.2 Adjusting the OCT • OCT is an over-current tripping device (code nr: 7), which trips a breaker in case of overload or short circuit. This is fully adjustable, instantaneous and direct tripping device. • OCT adjustment [Fig.3], within a specific range, is realized by turning the screw 1. • Adjusting procedure requires an SW6 hexagon wrench 2. • The adjustment must only be carried out after the breaker has been disconnected from the main circuit and has been grounded. • Turning the adjustment screw clockwise increased the trip threshold, turning the screw counter-clockwise decreased the tripping threshold. • Aligning the arrow and the marking into one line 3 performs adjustment. S47183-e 01/2008 Design and specifications are subject to change without notice 5
Page 1 and 2: GE Consumer & Industrial Power Prot
Page 3: 1. Warnings and Safety Hints 1.1 Wa
Page 7 and 8: 3.2.3 Mechanism • The Gerapid is
Page 9 and 10: With correctly designed interlock i
Page 11 and 12: • The sensor includes Hall-probes
Page 13 and 14: Control box terminals 1x12-pole AC
Page 15 and 16: 4.2 Terminals wiring system 1 2 3 4
Page 17 and 18: 4.3.2 Voltage converter Voltage con
Page 19 and 20: 4.3.4 NEKO control unit -X16 -X10,
Page 21 and 22: 4.3.6 Shunt trip control unit Emerg
Page 23 and 24: 4.3.8 Indicators -X3 :8 -X3 :12 -X3
Page 25 and 26: 4.3.10 SEL measuring system 1) 2) S
Page 27 and 28: 5.1 Safety distances. Units call in
Page 29 and 30: 5.2.2 Gerapid 2607, 4207, 6007with
Page 31 and 32: 5.2.4 Gerapid 8007 with arc chute 2
Page 33 and 34: 5.2.6 Gerapid 2607, 4207 with V / V
Page 35 and 36: 5.2.8 Gerapid 8007 terminals Gerapi
Page 37 and 38: 6.1.1 General visual inspection •
Page 39 and 40: 6.1.5 Inspection of contacts’ til
Page 41 and 42: D) Install the adapter • [Fig. 48
Page 43 and 44: D) Changing the pre-arcing contact
Page 45 and 46: Fig. 55-4 Unscrew all the plugs fro
Page 47 and 48: 6.3 Spare parts list Component Type
Page 49 and 50: 7.2 Ordering Form. Gerapid with Arc
Page 51 and 52: 7.2.1 Example of order 2. USA custo
Page 53 and 54: 7.4 Troubleshooting. Switching ON i

High Speed DC Circuit Breaker - G E Power Controls

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