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7.3 Troubleshooting
If during installation, commissioning, operation or maintenance any non-conformity occurs, contact your
nearest Tavrida Electric sales representative. The contact data and web site links are listed at the end of this
document. In case of a non-conformity any repairs are strictly prohibited without permission from the sales
representative. To be sure that a non-conformity occurred, please perform the checks as mentioned in Table
20 prior to contacting our regional representative.
Table 20 - Typical fault symptoms and methods of their elimination
Failure description
Possible reason
Method of elimination
Appearance failure
Mechanical or arc damage, breach of
service conditions
Replacement of failed component
Excessive contact resistance of ISM
ISM reached the permissible number of
operating cycles or decreasing of insulation
level in ISM vacuum interrupters
Replacement of ISM
ISM cannot pass power frequency voltage
withstand test at 80 % of rated voltage
ISM vacuum interrupters or insulation
damage
Replacement of ISM
ISM cannot perform close/trip operation
ISM is interlocked
Check ISM interlock state and its actuator coil
connection with connector X3 of CM
CM failure
Check CM LED states
Mechanical damage of ISM
Replacement of ISM
1 blink of CM “Malfunction“ LED
Absence of CM power supply
Check presence of CM power supply, its
polarity and voltage level
2 blinks of CM “Malfunction“ LED
ISM cannot be closed / tripped
Check the circuit of ISM actuator coil
connection with connector X3 of CM, check
state of ISM electrical interlocks
3 blinks of CM “Malfunction“ LED
ISM actuator coil circuit is interrupted
Check the circuit of ISM actuator coil
connection with connector X3 of CM, check
state of ISM electrical interlocks
4 blinks of CM “Malfunction“ LED
Short circuit of ISM actuator coil circuit
Check the circuit of ISM actuator coil
connection with connector X3 of CM, check
state of ISM electrical interlocks
5 blinks of CM “Malfunction“ LED
Manual trip of ISM and ISM is electrically
interlocked
Check the ISM and its interlock state
6 blinks of CM “Malfunction“ LED
CM is out of the temperature range
Stop performing CO operations until the
blinks stop if temperature is above the
temperature range or move CM into
environment with higher temperature if
temperature is below the temperature range.
7 blinks of CM “Malfunction“ LED
ISM state is open without command from
the CM
Check the ISM and its interlock state
CM “Malfunction“ LED lights continuously
Internal fault of CM
Replacement of CM
None of CM LEDs lights
Absence of CM power supply
Check presence of CM power supply, its
polarity and voltage level
Internal fault of CM
Replacement of CM
The ISM or CM removal and the installation of the new one should be performed according to chapter 0. The
checks and tests after substitution are described in chapter 5.
Summary of Contents for VCB Series
Page 1: ...COMPATIBLE SERIES USER GUIDE...
Page 2: ......
Page 4: ......
Page 5: ...1 Product description...
Page 13: ...13 2 Nameplates and seals...
Page 18: ...18 3 Product handling...
Page 37: ...4 Installation...
Page 87: ......
Page 88: ...5 Commissioning...
Page 94: ...94 Figure 155 The connection points of the contact resistance meter...
Page 95: ......
Page 96: ...6 Operation...
Page 100: ...7 Maintenance and troubleshooting...
Page 105: ......
Page 106: ...8 Disposal...
Page 109: ...109 Appendix 2 Overall Drawings...
Page 112: ...112 ISM15_LD_3 Weight 13 kg ISM15_LD_6 PCD 133 mm Weight 55 kg...
Page 113: ...113 ISM15_LD_8 PCD 210 mm Weight 26 kg...
Page 114: ...114 ISM15_MD_1 150_L PCD 150 mm Weight 33 kg ISM15_MD_1 210_L PCD 210 mm Weight 35 kg...
Page 115: ...115 ISM15_MD_3 Weight 13 kg ISM15_Shell_2 150_L PCD 150 mm Weight 51 kg...
Page 120: ...120 ISM15_HD_1 275 PCD 275 mm Weight 72 kg ISM25_LD_1 210_Par2 PCD 210 mm Weight 36 kg...
Page 123: ...123 ISM25_LD_2 2 PCD 150 mm Weight 37 kg ISM25_LD_3 Weight 14 kg...
Page 125: ...125 Dimensions of Control Module CM_16_1 Par1_Par2_Par3_Par4_Par5 Weight 1 kg...
Page 127: ...127 Dimensions of Interlocking Kits CBkit_Interlock_1 CBkit_Interlock_3...
Page 128: ...128 CBkit_Interlock_4 CBkit_Interlock_5...
Page 129: ...Appendix 3 Secondary Schemes...
Page 130: ...130...
Page 131: ...131...
Page 132: ...132...
Page 133: ...133...
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Page 135: ...135...
Page 136: ...136...
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Page 139: ...139...
Page 140: ...140...
Page 142: ...Bartlett...