44
TemBreak
PRO
B_BE-UM-001-EN
– V1.1.0
Troubleshooting
In the event of a problem when using the TemBreak
PRO
system, this section provides advice on how to resolve issues.
Problem description
Possible cause
Remedial advice
1
Abnormal voltage on load side
Excessive wear of contacts
Replace MCCB.
Foreign matter interfering with
contacts or contact surfaces
2
Failure in ON position
Reset operation not conducted
after tripping operation.
Perform reset operation.
3
Failure in RESET position
UVT not energised
Apply voltage to UVT
Circuit breaker service life ended
due to large number of switching
cycles using SHT or UVT
Replace MCCB
Fault of tripping mechanism
4
Nuisance tripping while rated current
not reached
Vibration and/or shock
Dampen vibration of MCCB and review installation requirements
High proportion of high frequency
distortion in load current.
Decrease distortion content of load circuit
Electromagnetic induced
interference (from nearby
conductors or external radio
sources)
Review nearby sources of conducted and radiated emissions (e.g. radio sources,
high-speed switching devices including variable frequency drives)
Excessive surge
Isolate and mitigate surge source (e.g. surge protection devices)
Erroneous connection of control
circuit for SHT or UVT
Verify control wiring and supply to SHT and UVT
5
Nuisance tripping due to starting
current
Excessive inrush starting current
due to load type
Review INST and STD protection settings for load type where applicable
Switching operation of star-delta
motor starter, incorrect wiring
Verify and correct any issues with star-delta starter wiring with respect to the motor
windings and phase sequence. Refer to motor and/or starter manufacturer
Short-circuit in motor (e.g.
windings, starter circuit)
Verify and correct any issues with motor wiring. Inspect and verify motor winding
insulation. Refer to motor manufacturer
Erroneous connection of control
circuit for SHT or UVT
Verify control wiring and supply to SHT and UVT
6
No trip at pickup current
Failure in selectivity/coordination
with upstream circuit breaker or
fuse
Review selectivity/coordination study and protection parameters of each device
Incorrect protection settings
Review enabled protection settings ensuring correct pickup current and time-delay for
load type. (e.g. LTD, STD, INST pickup currents and time delays)
Summary of Contents for TemBreak PRO
Page 45: ...45 TemBreak PRO B_BE UM 001 EN V1 1 0 Annex A Dimensions B250P ...
Page 46: ...Annex A Dimensions B250 46 TemBreak PRO B_BE UM 001 EN V1 1 0 ...
Page 47: ...Annex A Dimensions 47 TemBreak PRO B_BE UM 001 EN V1 1 0 B400P R ...
Page 48: ...Annex A Dimensions B400P R 48 TemBreak PRO B_BE UM 001 EN V1 1 0 ...
Page 49: ...Annex A Dimensions 49 TemBreak PRO B_BE UM 001 EN V1 1 0 B800N H G ...
Page 50: ...Annex A Dimensions B800N H G 50 TemBreak PRO B_BE UM 001 EN V1 1 0 ...
Page 51: ...Annex A Dimensions 51 TemBreak PRO B_BE UM 001 EN V1 1 0 B800P R ...
Page 52: ...Annex A Dimensions B800P R 52 TemBreak PRO B_BE UM 001 EN V1 1 0 ...
Page 53: ...Annex A Dimensions 53 TemBreak PRO B_BE UM 001 EN V1 1 0 B1000N H ...
Page 54: ...Annex A Dimensions B1000N H 54 TemBreak PRO B_BE UM 001 EN V1 1 0 ...
Page 55: ...Annex A Dimensions 55 TemBreak PRO B_BE UM 001 EN V1 1 0 B1250N H HL ...
Page 56: ...Annex A Dimensions B1250N H HL 56 TemBreak PRO B_BE UM 001 EN V1 1 0 ...
Page 57: ...Annex A Dimensions 57 TemBreak PRO B_BE UM 001 EN V1 1 0 B1600N HL ...
Page 58: ...Annex A Dimensions B1600N HL 58 TemBreak PRO B_BE UM 001 EN V1 1 0 ...
Page 89: ...89 TemBreak PRO B_BE UM 001 EN V1 1 0 Annex C I2t Let Through Curves B250P ...
Page 90: ...Annex C I2t Let Through Curves 90 TemBreak PRO B_BE UM 001 EN V1 1 0 B400P R ...
Page 91: ...Annex C I2t Let Through Curves 91 TemBreak PRO B_BE UM 001 EN V1 1 0 B800N H G ...
Page 92: ...Annex C I2t Let Through Curves 92 TemBreak PRO B_BE UM 001 EN V1 1 0 B800P R ...
Page 93: ...Annex C I2t Let Through Curves 93 TemBreak PRO B_BE UM 001 EN V1 1 0 B1000N H ...
Page 94: ...Annex C I2t Let Through Curves 94 TemBreak PRO B_BE UM 001 EN V1 1 0 B1250N H HL ...
Page 95: ...Annex C I2t Let Through Curves 95 TemBreak PRO B_BE UM 001 EN V1 1 0 B1600N HL ...
Page 96: ...96 TemBreak PRO B_BE UM 001 EN V1 1 0 Annex D Peak Let through Curves B250P ...
Page 97: ...Annex D Peak Let through Curves 97 TemBreak PRO B_BE UM 001 EN V1 1 0 B400P R ...
Page 98: ...Annex D Peak Let through Curves 98 TemBreak PRO B_BE UM 001 EN V1 1 0 B800N H G ...
Page 99: ...Annex D Peak Let through Curves 99 TemBreak PRO B_BE UM 001 EN V1 1 0 B800P R ...
Page 100: ...Annex D Peak Let through Curves 100 TemBreak PRO B_BE UM 001 EN V1 1 0 B1000N H ...
Page 101: ...Annex D Peak Let through Curves 101 TemBreak PRO B_BE UM 001 EN V1 1 0 B1250N H HL ...
Page 102: ...Annex D Peak Let through Curves 102 TemBreak PRO B_BE UM 001 EN V1 1 0 B1600N HL ...