Megger LTC135 Bruksanvisning
Läs gratis den bruksanvisning för Megger LTC135 (2 sidor) i kategorin mätning. Guiden har ansetts hjälpsam av 4 personer och har ett genomsnittsbetyg på 4.4 stjärnor baserat på 2.5 recensioner. Har du en fråga om Megger LTC135 eller vill du ställa frågor till andra användare av produkten? Ställ en fråga
Sida 1/2
▪▪
Winding Resistance Measurement
▪▪
Dynamic Resistance Measurement
▪▪
Switch sequence timing
▪▪
Transition/resistor measurement
Description
LTC135 is an accessory for circuit breaker analyzers to test Load Tap
Changers where it delivers test currents for the measurements.
The load tap changer is the only moving part connected to the
transformer windings. Taking a transformer off the system to
investigate an internal problem with a tap changer is an expensive
exercise; therefore it is in every utility’s interest to carry out condition
assessments of their tap changers to help detect developing faults at
an early stage.
LTC135
Load Tap Changer Testing Power Supply
LTC
Supported
measurements
EGIL
(with analog
measurement)
TM1600/
MA61
TM1700
series
TM1800
Single-phase
Continuity test X X X X
Dynamic current/
timing
X X X X
Dynamic voltage/
timing
X X X X
Dynamic resistance
and timing
X
1)
X X X
Motor current
(external clamp-on)
Three-phase
Continuity test X X X
Dynamic voltage/
timing
X X X
Dynamic resistance
and timing
X X X
Motor current
(external clamp-on)
X X
LTC control X X X X
1) Resistance can be indicated/estimated by combining measured dynamic
voltage and assumed/set test current
LTC135 is designed to be used together with the following Megger
instruments:
▪
EGIL
▪
TM1600/MA61
▪
TM1700 series
▪
TM1800
Together with the circuit-breaker analyzer (CBA) it becomes a a test
setup for performing dynamic measurements on load tap-changers.
The unit can also be used for winding resistance measurements
and other applications where a constant DC current test signal is
requested. It is a power supply designed for DC current testing
of inductive loads with provisions for discharging the transformer
winding when the test is finalized.
Postal address
Megger Sweden AB
Box 724
SE-182 17 DANDERYD
SWEDEN
T +46 8 510 195 00
F +46 8 510 195 95
seinfo@megger.com
www.megger.com
Visiting address
Megger Sweden AB
Rinkebyvägen 19
SE-182 36 DANDERYD
SWEDEN
Registered to ISO 9001 and 14001
Subject to change without notice.
Art.No. ZI-CG04E Doc. CG2016DE 2014• •
LTC135_DS_en_V04
www.megger.com
Megger is a registered trademark
Application example
Dynamic resistance measurement (DRM) technique has been used
extensively on high voltage circuit breakers to determine the condi-
tion and deterioration of arcing contacts inside the breaker. DRM
is also an advanced diagnostic tool for LTCs to detect problems like
coking (creation of pyrolytic carbon and thick organic film on the
contacts), long term degradation of tap selector contacts and revers-
ing switch contacts, deviation in switching times, damaged transi-
tion resistors or reactors and excessive resistance increase of arcing
and main contacts of LTC. DRM is measurement of resistance (or
voltage from a constant current source) trace while the tap changer
is switched from one extreme tap to the other and back. Since the
resistance changes dynamically as the LTC taps are changed, it is re-
corded with a high sampling rate and plotted as a function of time.
Dynamic change in resistance (or voltage) plot gives valuable infor-
mation about the contact condition which cannot be determined by
traditional static winding resistance measurements (WRM).
Magnitude of test current for DRM test is very important. DRM
response obtained at different test currents on same LTCs should
not be compared as DRM trace would vary depending upon the
magnitude of test current selected. One of the major differences
between DRM and WRM setup, other than selection of test current,
is shorting the corresponding secondary winding. The reason for
shorting the secondary windings is twofold. First, by reducing the
inductance it minimizes the L/R time constant of the circuit that al-
lows to measure and track fast variations in voltage/resistance as the
taps are changed. The WRM test should use 1 and 5A per tap and
the DRM test preferably a constant current source of 100 mA.
General hook-up overview, in this case together with
TM1760.
Ordering information
Item Art. No.
LTC135
Including carrying bag and cables
CG-92100
Specifications LTC135
Specifications are valid at an ambient temperature of +25°C,
(77°F). Specifications are subject to change without notice.
Environment
Application field For use in high-voltage substations and
industrial environments.
Temperature
Operation -20ºC to +65°C (-4°F to +149°F)
Storage -40ºC to +85ºC (-40°F to +185°F)
Relative humidity %RH 5%-95%, non condensing
CE-marking
EMC 2004/108/EC
LVD 2006/95/EC
General
Mains voltage 100 - 250 V AC, 50 / 60Hz
Power consumption 300 W (max)
Dimensions 360 x 195 x 300 mm
14.2 x 7.7 x 11.8 in.
Weight 6.5 kg (14.3 lbs) instrument only
10.9 kg (24 lbs) with accessories and
carrying case
Outputs
Output current 3 x 0.1 A 3 x 1 A 1 x 5 A
Open circuit voltage 48 V 48 V 48 V
Output impedance 480 Ω 48 Ω 9.6 Ω
Shunt output 1 V / 0.1 A 1 V / 1 A 1 V / 5 A
Shunt inaccuracy 0.1% 0.1% 0.1%
Measurement range
EGIL and TM1600 (4 V) 0 - 44 Ω 0 - 4.4 Ω 0 - 850 mΩ
TM1700/1800 (15 V) 0 - 200 Ω 0 - 20 Ω 0 - 4 Ω
Carrying bag
Included accessories
Sets of test leads (x3) 20 m (65 ft)
x3
Produktspecifikationer
| Varumärke: | Megger |
| Kategori: | mätning |
| Modell: | LTC135 |
Behöver du hjälp?
Om du behöver hjälp med Megger LTC135 ställ en fråga nedan och andra användare kommer att svara dig
mätning Megger Manualer
2 Augusti 2025
2 Augusti 2025
2 Augusti 2025
2 Augusti 2025
2 Augusti 2025
2 Augusti 2025
2 Augusti 2025
2 Augusti 2025
2 Augusti 2025
2 Augusti 2025
mätning Manualer
- Kern
- Testboy
- Uni-T
- Eastron
- Greisinger
- Owon
- Megasat
- Autel
- Fluke
- Schneider
- Blackmagic Design
- Emko
- Mitsubishi
- Dasqua
- Ade
Nyaste mätning Manualer
2 Augusti 2025
2 Augusti 2025
2 Augusti 2025
2 Augusti 2025
2 Augusti 2025
2 Augusti 2025
2 Augusti 2025
2 Augusti 2025
31 Juli 2025
31 Juli 2025