CT/PT Comprehensive Tester | Transformer Volt-Ampere Characteristic
Test Equipment
Product OverviewMY-202 is a full automatic PT, CT characteristics tester. The
instrument can complete tests including: CT Volt-ampere
characteristics test, PT Volt-ampere characteristics test, CT
Polarity test, PT Polarity test, CT variable ratio Polarity test,
PT variable ratio Polarity test, Automatic computing CT arbitrary
point error curve, CT/PT variable ratio.
Product Alias
Comprehensive Tester for Transformer Volt-Ampere Characteristics/CT
Volt-Ampere, Ratio & Polarity Tester/CT Comprehensive Volt-Ampere
Characteristic Tester/CT Comprehensive Volt-Ampere Characteristic
Tester/CT Volt-Ampere Characteristic Tester/Transformer Volt-Ampere
Characteristic Tester/Comprehensive Tester for VA Characteristics,
Ratio and Polarity/Volt-Ampere (VA) Characteristic
Tester/Comprehensive Volt-Ampere Characteristic Tester
Features
1.Full Function: Comprehensive CT and PT testing capabilities
2.Output Keeping: Boost function for measurement, detection, and
secondary AC withstand voltage test
3.True Effective Value Sampling: All voltage and current signals
are true effective values
4.Single Power Supply: Easy operation with AC220V input only
5.U Disk Save: Test data transmission to PC via USB
6.Date and Clock: Built-in system time for test record tracking
7.No Contact Test: High safety with fully computerized operation
8.Large Output Capacity: AC voltage output up to 2000V, current
output up to 25A short time
9.Large 8-inch Color Touch Screen: High-resolution 1024*768 LCD
with Chinese graphical interface
10.Touch Screen Operation: Advanced touch technology for simple,
convenient operation
11.Ultra Large Capacity Data Storage: 50 groups of test data
storage with U disk backup
CT Test Functions
1.Volt ampere characteristic curve
2.Automatic calculation of curve inflection point
3.5% and 10% error curve
4.Ratio and polarity
5.Differential and angular difference measurement
6.Secondary side circuit load testing
7.Secondary winding AC withstand voltage
8.Secondary DC resistance test
9.Flow test
PT Test Functions
1.Volt ampere characteristic curve
2.Automatic calculation of curve inflection point
3.5% and 10% error curve
4.Ratio and polarity
5.Difference, angular difference measurement
6.Secondary side circuit load testing
7.Secondary winding AC withstand voltage
8.Secondary DC resistance test
Technical Parameters
| Parameter | Range/Value | Resolution |
|---|
| Power input voltage | AC 220 V | - |
| CT volt ampere characteristic test | 0~2500 V, 0~20A | 1mV, 1mA |
| CT variable ratio error, angle error test | 0~1000A (primary), 0~5A (secondary) | 1mA |
| CT secondary loop load | 0~5A, 0~10Ω | 1mA, 0.001Ω |
| PT Volt-ampere characteristic test | 0~200V, 0~10A | 1mV, 1mA |
| PT variable ratio, ratio angle error test | 0~2500V (primary), 100V/57.7V/100/3V (secondary) | 1mV |
| Accuracy class - Volt ampere characteristic test | < 0.5% | - |
| Accuracy class - 5% and 10% error curve | < 1% | - |
| Working environment temperature | -10℃ - +50℃ | - |
Application Scenarios
FAQ
Q1: What tests can this instrument perform?
It completes all tests for current transformers (CT) and voltage
transformers (PT), including volt-ampere characteristic curve
plotting, knee point voltage & current calculation, winding DC
resistance, transformation ratio measurement, polarity
identification and secondary load test. It is applicable for both
protection-class and metering-class instrument transformers.
Q2: What voltage levels does it support? Is it suitable for
substations?
It fits all high & low voltage instrument transformers ranging from
10kV to 220kV, widely adopted for substation daily maintenance,
power handover acceptance tests and factory delivery inspection of
transformer manufacturers.
Q3: Do I need an external booster device? Is operation complicated?
Built-in integrated boosting power supply, no external voltage
regulator or booster is required. Equipped with a color LCD screen,
it supports one-click fully automatic testing. The system
automatically collects data and draws characteristic curves;
operators can master the operation quickly after simple training.
Q4: Are CT and PT wiring terminals separated? How to avoid wrong
wiring?
Clear wiring schematic diagrams are printed on the panel. Terminals
for CT and PT are divided independently and marked with different
colors, which effectively reduces the risk of incorrect wiring
connection.
Q5: Abnormal test curves and fluctuating data, what are the
solutions?
Retighten all test wiring terminals and wipe off the oxide layer on
wiring clamps; confirm no open circuit or short-circuit fault
exists on the secondary loop of the transformer, then restart the
test.
Q6: Shipping Method
If we place an order, how do you typically ship the goods? Will
there be any issues with transporting bulky items such as reactors?
We default to using dedicated logistics lines or brand-specific
express shipping services; small-sized main units and accessories
may also be shipped via standard courier services. Large items,
such as reactors and excitation transformers, are packed using
wooden crates or wooden frames for reinforcement to prevent bumps
and moisture exposure during transit; a packing list is included
with each package to facilitate item-by-item counting for you.
Logistics costs are typically determined by both parties in
accordance with the contract terms; after shipment, we will send
you both the tracking number and the carrier's contact phone number
for easy tracking.If your project site is remote or if delivery to
the site is required with a specified logistics company, please
inform us in advance when placing your order; we can then
coordinate and arrange accordingly.
Q7: Delivery Lead Time
Our project is under tight deadlines; how long will it take for the
order to be shipped after we place it? Can we request expedited
shipping?
Standard specifications – stock available; typically delivered upon
receipt of the order. Orders can be shipped within [X] working
days; for non-standard products requiring customized voltage
levels, capacities, or reactor combination configurations, the
production cycle typically ranges from [X] to [Y] days.The delivery
time will be approximately 7-15 working days; the specific timeline
shall be subject to the sales confirmation provided upon order
placement. If your project has a tight schedule, please inform us
of the latest expected delivery date before placing your order; we
will first verify the production schedule and inventory status, and
where possible, will coordinate expedited production and prioritize
shipment. However, it is recommended to allocate sufficient transit
time for logistics to avoid delaying on-site testing.
Q8: After-sales Service and Warranty
What is the warranty period for this equipment? If any issues arise
during on-site use, how will your after-sales service respond?
We provide a two-year free warranty on the entire unit and lifelong
technical support services. During the warranty period, if issues
arise due to defects in the equipment itself, we will provide free
repair or replacement of components; when problems occur on-site,
we commit to responding within 24 hours; most wiring and parameter
configuration issues can be resolved through remote guidance via
video or telephone; for cases where an on-site visit is necessary,
we will arrange for our technicians to arrive at the location to
resolve the issue. After the warranty period expires, we still
offer repair services, with spare parts supplied at cost price for
the long term, and software updates provided free of charge for
life. Upon delivery of the equipment, we also offer free
operational training (video operation guides)to ensure that your
testing personnel can operate the equipment independently and
proficiently; should you have any further questions, please feel
free to contact our dedicated after-sales hotline directly.
Q9: Shipping methods for each region (Sea freight)
Our projects are distributed across several states, and our
procurement volumes are substantial; are the shipping methods
consistent across all states? How is the delivery time calculated?
Manufacturer: The specifications are identical; however, it should
be specifically noted that this equipment set is large in size and
heavy in weight—components such as the reactor and excitation
transformer are all classified as heavy components. Therefore,
regardless of which state or region the shipment is destined for,
we will uniformly utilize sea freight transportation. The packaging
employs export-grade wooden crates with reinforced structures,
along with moisture-proof and rust-proof treatments; the design of
these wooden crates is optimized for long-distance sea transport
and multiple lifting and transshipment operations. Upon arrival at
the destination, simply unpack the goods and conduct an inspection
before putting them into use. Regarding delivery time, the sea
freight transit period depends on the port of destination: near-sea
routes are generally faster, whereas ocean routes may take longer;
the exact number of days will be confirmed based on the shipping
schedule specified in the bill of lading. We have a dedicated
freight forwarding agency to handle booking of shipping space,
customs declaration, insurance, and other related procedures; once
the vessel departs, we will send you documents such as the bill of
lading and the packing list, enabling you to arrange for the
receipt of goods at the port of destination and their inland
transshipment in advance.
Shipping scenario
Scene (One)
Scene (Two)
Attachment Directory
Attachment Image
CT‑PT Comprehensive Tester Instrument Transformer Analyzer With Built‑in Thermal Printer
