9
Definitions
The following abbreviations are used in this operating manual:
AR
Automatic reclosing
CM
Control module
CO
Close open cycle
ISM
Indoor switching module
LED
Light emitting diode
MCB
Miniature circuit breaker
Make time
The make time is the time period from the energising of the closing circuit to the time when the current begins to
flow in the first pole.
Closing time
The closing time is the time period from the energising of the closing circuit to the time when all three poles make
contact.
Pre-arcing time
Interval of time between the initiation of current flow in the first pole during a closing operation and the instant
when the contacts touch in all poles for three-phase conditions or the instant when the contacts touch in the
arcing pole for single-phase conditions.
Opening time
The opening time is the time period from energising of the closing circuit up to the time when all the switching
poles are separated.
Break time
The break time is the time period from the energising of the closing circuit up to the time when the arcs of all the
poles are extinguished.
Open-close time (during AR)
Interval of time between the instant when the arcing contacts have separated in all poles and the instant when the
contacts touch in the first pole during a reclosing cycle.
Dead time (during AR)
Interval of time between final arc extinction in all poles in the opening operation and the first reestablishment of
current in any pole in the subsequent closing operation.
NC
Normally closed contact
NO
Normally open contact
PCD
Pole center distance
SCADA
Supervisory control and data aquisition
VCB
Vacuum circuit breaker
VI
Vacuum interrupter
General
In comparison to conventional circuit breakers, the Tavrida Electric vacuum circuit
breakers comprise of two components:
· The ISM (Figure 1)
· The CM for controlling the ISM and monitoring both modules (Figure 2)
Both modules must only be operated together and are meant for indoor
installations only. The possibility to choose ISM and CM separately allows any type
of switchgear to be easily equipped with regard to its primary and auxiliary circuits.
Figure 1
Figure 2
1
Summary of Contents for ISM Shell_2 Series
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Page 7: ...7 Introduction 1...
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Page 13: ...13 Receiving Handling and Storage 2...
Page 19: ...19 Ins tallation 3...
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Page 37: ...37 Switching and Control Functions 4...
Page 41: ...41 Commiss ioning Maintenance 5...
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Page 45: ...45 Signalling 6...
Page 49: ...49 Special Applications Fast Switching 6...
Page 53: ...53 Product Line 7...
Page 55: ...55 Dimens ions and Weights 8...
Page 61: ...61 8 Mating part with interlocking lever Interlockingshaftwithmountedinterlockinglever...
Page 62: ...62 Circuit Diagrams 9...
Page 63: ...63 ISM15_Shell_2 with CM_1501_01 9...
Page 64: ...64 ISM15_Shell_2 with CM_16_1 9...
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Page 66: ...66 Technical Data 10...
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Page 72: ...72 Regulations and Ambient Conditions 11...
Page 74: ...74 Legal Information 12...
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Page 79: ...79 Date 12...
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