ETP Transformer protection

ETP Transformer protection

Differential protection for transformers (starting from approx. 1 MVA), combined with time overcurrent protection, can be investigated using measurement techniques in normal operation, fault occurrences in various winding circuit configurations (star, delta), in various vector groups and as a function of star-point treatment (floating, direct or earthed using earth coils). In the case of differential currents, the tripping criteria is determined based on characteristic sensitivity.

The time overcurrent protection supplements the safety protection measures contained in transformer differential protection. It protects the transformers against short circuits outside the protection range and against overloading. 

ETP 1 Transformer differential protection

Training contents:

  • Detection and disconnection of transformer for internal faults
  • Detection of peak inrush currents (RUSH) without disconnection
  • Faulty tripping due to incorrectly dimensioned transformers
  • Selection of tripping characteristics with differential currents taken into account

ETP 2 Time overcurrent protection

Training contents:

  • Setting the parameters of the time overcurrent relay while taking the current transformation into consideration
  • Detection of operating values for symmetrical and asymmetrical faults
  • False tripping of the protective device during transformer’s switch-on response
  • Transformer switch-on response in terms of protection
Basic equipment set, consisting of: 
1
Transformer / Generator differential protection relay with time over current protection
Transformer / Generator differential protection relay with time over current protection CO3301-4M
3
Power switch module
Power switch module CO3301-5P
1
Isolating transformer, Three-phase, 1kW
Isolating transformer, Three-phase, 1kW CO3301-3N
1
Transmission line model 150km/300km (93.2miles/186.4miles)
Transmission line model 150km/300km (93.2miles/186.4miles) CO3301-3A
1
Variable Ohmic load, three-phase, 1kW
Variable Ohmic load, three-phase, 1kW CO3301-3F
Media:
1
Interactive Lab Assistant: Protection for transformers
Interactive Lab Assistant: Protection for transformers SO2800-9J
Software:
1
Software SCADA Viewer
Software SCADA Viewer SO4001-3H
1
Patch cable Cat5E 1x 1m yellow, 2x 2m yellow
Patch cable Cat5E 1x 1m yellow, 2x 2m yellow LM9057
1
USB Network Adapter 10/100 BaseTX RJ45
USB Network Adapter 10/100 BaseTX RJ45 LM9056
1
5-Port Ethernet Switch
5-Port Ethernet Switch LM9988
Power supply:
1
Adjustable 3-phase power supply, 0-450V/2A
Adjustable 3-phase power supply, 0-450V/2A CO3301-3Z
1
Multiple socket outlet, 6 fold, with illuminated switch
Multiple socket outlet, 6 fold, with illuminated switch ST8010-4J
Measuring instruments:
2
Three-phase power quality meter, display and long-term memory
Three-phase power quality meter, display and long-term memory CO5127-1S
Accessories:
40
Safety connecting plug 4mm with tap (2x), black, 1000V/32A CAT II
Safety connecting plug 4mm with tap (2x), black, 1000V/32A CAT II SO5126-3R
2
Safety connecting plug 4mm with tap (2x), blue, 1000V/32A CAT II
Safety connecting plug 4mm with tap (2x), blue, 1000V/32A CAT II SO5126-3V
2
Safety connecting plug 4mm with tap (2x), green/yellow, 1000V/32A CAT II
Safety connecting plug 4mm with tap (2x), green/yellow, 1000V/32A CAT II SO5126-3W
1
Set of safety measurement cables, 4mm (31 leads)
Set of safety measurement cables, 4mm (31 leads) SO5148-1L
1
Mobile aluminium experiment stand, 3 levels, power strip with 6 sockets, 1250x700x1995mm
Mobile aluminium experiment stand, 3 levels, power strip with 6 sockets, 1250x700x1995mm ST7200-3A
1
Wall or aluminium-profile mounting cable storage for 48 cables
Wall or aluminium-profile mounting cable storage for 48 cables ST8003-8E
1
PC holder for SybaPro experiment trolleys, height/width adjustable
PC holder for SybaPro experiment trolleys, height/width adjustable ST7200-5F
1
Monitor holder for flat screen monitor of weight up to 15kg / 33lbs
Monitor holder for flat screen monitor of weight up to 15kg / 33lbs ST8010-4T
1
Keyboard adapter for flat screen monitor holders
Keyboard adapter for flat screen monitor holders ST8010-4G
1
Protection cover for three-level experiment trolleys
Protection cover for three-level experiment trolleys ST8010-9Y