Megger dc insulation resistance testers -seminario
1. 1
MIT and S1 Series
5kV and 10kV
DC Insulation Resistance Testers
Dover Power
Paul Swinerd
2. 2
Presentation Agenda
Megger MIT 5kV and 10 kV series summary
New 5kV and 10 kV S1-Series introduction – New product launch!
Market segmentation and differentiation
MIT range and S1-Series customer benefits
3. 3
New S1 IRT Family
Industrial range of IRTs
• MIT515, MIT525, MIT1025 – Industrial range
• Introduced in April 2012 replacing MIT510/2, MIT520/2,
MIT1020/2
Utility/service company range of IRTs
• Old S1:
– S1-552/2, S1-1052/2
– S1-554/2, S1-1054/2 (4 mA noise rejection)
– Will still be sold for 6 months following new S1 launch
• New S1: New product launch today!
– S1-568 (5 kV, 6 mA SC current, 8 mA noise rejection)
– S1-1068 (10 kV, 6 mA SC current, 8 mA noise rejection)
MIT525
S1-568
5. 5
New S1-Series Introduction
S1 - Series
Descendant of
Series 1
The Utility
premium range.
Higher noise immunity
Faster capacitance
charge
Remote operation
High altitude safety
Bluetooth
6. 6
TRANSPORT MILITARY INDUSTRIAL HEAVY INDUSTRIAL
EXAMPLE LOCATIONS RAILWAY ARMY PAPER MILLS STEEL WORKS
SHIPS NAVY MANUFACTURING >5MVA RAW MATERIAL CONV >5MVA
AIRPORTS AIRFORCE MEDIUM ENGINEERING HEAVY ENGINEERING
PORTS MILITARY AEROSPACE NEWS PRESS LARGE FACTORIES
TRAM SYSTEMS PANEL BUILDERS GLASS / CERAMICS
UNDERGROUND AUTOMOTIVE ALUMIMIUM SMELTING
CIVAL AEROSPACE OIL REFINING
SHIP BUILDING
LV + HV LV + HV LV + HV LV + HV
INITIAL CONTACT IF HV MOTOR IF HV MOTOR IF HV MOTOR IF HV MOTOR
RECOMMENDATION OR SUBTATION = OR SUBTATION = OR SUBTATION = OR SUBTATION =
MIT515 MIT515 MIT515 MIT515
MIT525 MIT525 MIT525 MIT525
MIT1025 MIT1025 MIT1025 MIT1025
OTHER OPTION S1-568 S1-568
S1-1068 S1-1068
For Service Companies For Service Companies
Remote operation for OEM? Remote operation for OEM?
MIT Industrial range 5kV and 10 kV
S1 Series - Utility 5kV and 10 kV
Market
segmentation
and
differentiation
7. 7
LARGE SITES POWER GENERATION POWER DISTRIBUTION POWER GENERATION POWER TRANSMISSION
SITE AND BUILDINGS WIND FARM SUBSTATION POWER STATIONS SWITCH YARDS
UNIVERSITIES HV 11 -132 KV HYDRO 132 - 800 KV TRANSMISSION
TRADE PARKS REMOTE TRANSFORMERS HV 30 - 800 KV OVERHEAD CABLES
RETAIL PARKS
PHARMACUTICALS
HOSPITALS
LOCAL AUTHORITIES
BANKS
LV + HV LV + HV LV + HV LV + HV HV
IF HV MOTOR MIT515 S1-568 S1-568 S1-568
OR SUBTATION = MIT525 S1-1068 S1-1068 S1-1068
MIT515 MIT1025
MIT525
MIT1025
S1-568 S1-568 MIT515
S1-1068 S1-1068 MIT525
For Service Companies If there is excessive MIT1025
inverter noise If price is problem
S1 Series - Utility 5kV and 10 kV
MIT Industrial range 5kV and 10 kV
Market
segmentation
and
differentiation
8. 8
Megger 5 kV and 10 kV immunity levels
Old S1
New S1
New S1 ?
New MIT
Old MIT
0
1
2
3
4
5
6
7
8
9
0
75
150
220
275
350
400
475
550
625
700
765
850
925
1000
Environment kV
Imunity(mA)
Megger 5 kV and 10 kV immunity levels
Old S1
New S1
New S1 ?
New MIT
Old MIT
0
1
2
3
4
5
6
7
8
9
0
75
150
220
275
350
400
475
550
625
700
765
850
925
1000
Environment kV
Imunity(mA)
Fully
tested in
765 kV
S1-568 S11068
Fully
tested in
765 kV
S1-568 S11068
Fully
tested in
765 kV
S1-568 S11068
MIT515 MIT525 MIT1025MIT515 MIT525 MIT1025
Market segmentation and differentiation
Noise
immunity is
important
differentiator
But not the
only one…
9. 9
Top 8 instrument requirements
1. Safety
2. Easy to use
3. The right functionality
4. Good noise Immunity
5. Good accuracy
6. High output current
7. High measurement range
8. Tough and reliable
How do they relate
to these common
customer issues?
1. Safety
2. Ease of use
3. Operational reliability
4. Measurement reliability
5. Measurement functionality
11. 11
1. Safety – a key issue
– High energy environments?
– CATIV rating provides confidence
– CATIV 600V immune to 8kV high energy transients
– New S1-Series CATIV 600V to 3000m altitude
– CAT rating is on ALL terminals
– Protected to 1000V between ALL terminals
Common user issues
12. 12
1. Safety – a key issue
– High energy environments?
– IEC 61010-031 :2008 important safety enhancements
for test leads
– New section “Prevention of HAZARD from arc
flash and short-circuits” added
Common user issues
13. 13
1. Safety – a key issue
– High energy environments?
– Dual case design
– Yes… TWO cases
– Inner case fire retardant
– Outer case ultra tough
– Lid mounted leadset bag prevents lead
damage
– Isolated USB-to-PC interface up to 10 kV
Common user issues
14. 14
1. Safety – a key issue
– High energy environments?
– Concern over receiving shock from instrument
– The danger is actually the after effects
Large finger guards
to keep fingers back
from live parts
Side Pivot guards
maintain creepage
paths
Pivot guard
maintains
clearance
Large finger guards
to keep fingers back
from live parts
Side Pivot guards
maintain creepage
paths
Pivot guard
maintains
clearance
Finns increase surface
creepage distance
Finns
Finns increase surface
creepage distance
Finns
Common user issues
15. 15
1. Safety – a key issue
– High energy environments?
– Concern over receiving shock from instrument
– Safe discharge of long cable capacitance
– Clips are not removable – hard wired
– Unique locking terminals
Common user issues
16. 16
2. Ease of use
– Difficult to carry and store
– 24% reduction in size over predecessors
– 35% reduction in weight over predecessors
– Now only 4.5kg
Common user issues
17. 17
2. Ease of use
– Difficult to carry and store
– Takes too long to perform tests
– Difficulty operating
– Rotary switch operation
– No hidden modes of operation
– No 2nd function keys
– Quick start guide on all
Common user issues
18. 18
2. Ease of use
– Difficult to carry and store
– Takes too long to perform tests
– Difficulty operating
– Testing with non preset voltage?
– E.g. 2200V ?
– New Lock Voltage Range
– Select required test voltage immediately at
switch on.
– Set voltage up in setting range, then select on
the locked voltage range
– S1 adds remote operation via USB
OFF 500V
1kV
2.5kV
5kV
10kV
V
V
TΩ
USB
Common user issues
19. 19
2. Ease of use
– Difficult to carry and store
– Takes too long to perform tests
– Difficulty operating
– Test result storage difficult
– Test results date and time stamped
– D/L stored results or real-time download
– Temperature value stored
– S1 stores humidity value
– S1 downloads via bluetooth
Common user issues
20. 20
3. Operational reliability
– Battery found flat – previous user didn’t charge
– Can operate from line supply
– Charges from reported dead in TWO hours
– Half hour charge provides a full hour testing
– Full 6 hours continuous testing from full charge
Common user issues
21. 21
3. Operational reliability
– Battery found flat – pervious user didn’t charge
– Short battery service life
– New Lithium ion battery
– Safety accredited
Common user issues
22. 22
3. Operational reliability
– Battery found flat – pervious user didn’t charge
– Short battery service life
– Battery replacement difficult
– Customer replaceable battery
– No calibration required
– Access without disturbing calibration seals
Calibration seals
Battery cover
Calibration seals
Battery cover
Common user issues
23. 23
3. Operational reliability
– Battery found flat – pervious user didn’t charge
– Short battery service life
– Battery replacement difficult
– Difficult to read display in low light
Common user issues
24. 24
3. Operational reliability
– Battery found flat – pervious user didn’t charge
– Short battery service life
– Battery replacement difficult
– Difficult to read display in low light
– Instruments get damaged (Not Megger obviously…☺)
– Toughness not compromised with fire retardant
materials
– Quality components
– Quality build
– Built to last….. It’s a Megger!
IP65
Common user issues
25. 25
4. Measurement reliability
– Poor measurement repeatability
– Is the instrument accurate enough?
– Typical measured values in sub-station / switch
yard 100GΩ to 500GΩ
– Megger provides accuracy where it matter most!
– 5% all the way up to at least 1TΩ
Common user issues
26. 26
4. Measurement reliability
– Poor measurement repeatability
– Is the guard terminal operating correctly?
– Megger is still the only manufacturer to specify the
performance of the guard terminal
Common user issues
27. 27
4. Measurement reliability
• Poor measurement repeatability
• Variation of measurement during test
– Likely to be caused by noise pick up
– 2mA noise immunity is a good instrument
– Megger MIT range is 3mA
– Ideal for any industrial environment
– In-fact up to ~220 kV locations
– S1-568 and S1-1068 8mA with variable time constant
– Ideal for Utilities and Service companies
– Stable readings anywhere
Common user issues
28. 28
Tested performance at 765 kV - result below
• 8 mA noise rejection
• Four selectable filter settings: 10 s, 30 s, 100 s, 200 s
Seoni 765 kV substation
No filter gives -ve current readings
Common user issues
29. 29
4. Measurement reliability
– Poor measurement repeatability
– Variation of measurement during test
– Problems maintaining selected test voltage
– Is the output voltage right?
– Is there enough power?
– High loads could mean low voltage
– MIT 3mA into short circuit
– S1 Series 6mA into short circuit
– MIT and S1 has Max power regulation - ensures
maximum power transfer
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
0 2 4 6
M ohms
Outputvoltage
500V
1kV
2.5kV
10kV
5kV
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
0 2 4 6
M ohms
Outputvoltage
500V
1kV
2.5kV
10kV
5kV
Common user issues
30. 30
4. Measurement reliability
– Poor measurement repeatability
– Variation of measurement during test
– Problems maintaining selected test voltage
– Instrument only says infinity?
– Inability of instrument to take measurement
– MIT 5kV to 10TΩ, and 10kV to 20TΩ
– S1 5kV to 15TΩ, and 10kV to 35TΩ
– Megger also keeps focus on accuracy
Common user issues
31. 31
5. Measurement functionality
– Can’t test rotating machinery to IEEE 95
– Ramp test now included on MIT
and S1
– Meets requirements of IEEE 95
– Default ramp of 1000V per minute
– User adjustable
– View plotted current curve via
Power DB Lite
Common user issues
32. 32
5. Measurement functionality
– Can’t test rotating machinery to IEEE 95
– Can’t test HV rotating machinery to IEEE 43-2000
– Up to a maximum 10kV required
– MIT1025, S1-1068 are 10kV
Common user issues
33. 33
5. Measurement functionality
– Can’t test rotating machinery to IEEE 95
– Can’t test HV rotating machinery to IEEE 43-2000
– Time taken to test long cables
– MIT 3mA charge current
– S1 6mA charge current
– Max. power regulation helps here too
– MIT charges capacitance as fast as many
competitor 5mA instruments
– S1 is fastest on the market
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
0 2 4 6
M ohms
Outputvoltage
500V
1kV
2.5kV
10kV
5kV
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
11000
0 2 4 6
M ohms
Outputvoltage
500V
1kV
2.5kV
10kV
5kV
Common user issues
34. 34
5. Measurement functionality
– Can’t test rotating machinery to IEEE 95
– Can’t test HV rotating machinery to IEEE 43-2000
– Time taken to test long cables
– Need a separate volt meter
– MIT and S1 now has user selectable voltage range
– Measures AC and DC with 3% ±3V accuracy
Common user issues
35. 35
5. Measurement functionality
– Can’t test rotating machinery to IEEE 95
– Can’t test HV rotating machinery to IEEE 43-2000
– Time taken to test long cables
– Need a separate volt meter
– Cannot detect induced voltages
– Cannot verify generated supply frequency
– Measures frequency (Hz) of applied AC voltage
– Verify generated frequency
– Detect presence of induced voltages
Common user issues
36. 36
S1-Series customers
Sell current S1-Series to
• Utilities
• Large OEMs
– ABB
– Alstrom
– Areva
– Siemens
– GE
• Large national/regional service companies
• Regularly specified into utilities, service companies