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18

Used casting in China

LZCG530-10 11KV cast epoxy resin straight-through current transformer
The model LZCG530-10 series straight-through ct is a ring type resin casting 0.2s current transformer. It is suitable for current measurement and microcomputer protection of electrical equipment in 10KV and 35KV ...
Beijing, China
LZCT722-10 electrical cast resin zct zero sequence current transformer
LZCT722-10 zero sequence current transformer is suitable for current measurement and microcomputer protection of electrical equipment in 10KV and 35KV AC power system.
Beijing, China
LZCG930-10 cheap low voltage cast resin ring core current transformer
- Manufacturer: Resina
The model LZCG930-10 CT is a ring type resin casting current transformer. Some clients also called it as TTCC.
Beijing, China
LZCK350-10 100/5A epoxy resin cast split core current transformer
- Manufacturer: Resina
The model LZCK350-10 ct is a ring type resin casting split core current transformer. Some clients also called it as TTCC.
Beijing, China
LZCK310-10 400/5a cheap split core cast resin current transformer
The model LZCK310-10 is a window type resin casting split core current transformer. Some clients also called it as TTCC. This model can be used both for measurement and microcomputer protection of electrical equi...
Beijing, China
Automatic transformer oil breakdown voltage test kit/oil BDV dielectric tester
- Manufacturer: Run Test
New product self protection function anti-interference insulation oil bdv tester Product Detail Usage: Oil Break Down Voltage Test. Feature: 1.Large capacity microcomputer ensure a fast and reliable operation. 2....
Baoding, China
LZCK2500-10 high accuracy 33KV split core zero phase current transformer
The model LZCK2500-10 zero phase ct is a ring type resin casting split core current transformer. Some clients also called it as TTCC.
Beijing, China
LZCK720-10 resin measuring or protection split core dry type cTs
- Manufacturer: Resina
The model LZCK720-10 split core ct is a ring type resin casting split core current transformer. Some clients also called it as TTCC.
Beijing, China
GFLZZ0954-10E presicion ANSI 5A CTs current transformer supplier
The dry type current transformers GFLZZ0954-10E are cast in epoxy resin insulated with big surface creepage distance and are excellent in anti-pollution and humidity protection.
Beijing, China
GFLZZ0757-35Q epoxy resin medium voltage outdoor current transformer
The supporting-type current instrument transformers GFLZZ0757-35Q are fully enclosed and cast in epoxy resin. Transformer is equipped with one core and coil assembly rated for measurement and protection.
Beijing, China
JLSZV-35W 3P4W IEC combined current transformer and potential transformer
- Manufacturer: Combi
GFUVE electronics manufactures an extensive line of cast epoxy resin insulated current transformers and potential transformers across the voltage range of 5.5KV to 72.5kV.
Beijing, China
LZZW3-35Q instrument multi ratio current transformer
The outdoor instrument current transformers LZZW3-35Q are fully enclosed and cast in epoxy resin. Instrument transformer is equipped with one core and coil assembly rated for measurement and protection, and then ...
Beijing, China
LZZW1-35Q hight accuracy industrial post type current transformer
The 33KV medium voltage current instrument transformers LZZW1-35Q are fully enclosed and cast in epoxy resin. Transformer is equipped with one core and coil assembly rated for measurement and protection.
Beijing, China
GFLZZ1235-20A2 33kv medium voltage current transformer manufacturer
The current transformer of the type GFLZZ1235-20A2 is casting resin and fully enclosed. It is used for metering electric energy and current, relay protection in the electrical system up to rated frequency 50Hz of...
Beijing, China
LZCK322-10 11KV 33KV high voltage split core CT current transformer
The Model LZCK322-10 is a ring type resin casting split core current transformer. Some clients also called it as TTCC. This model split core ct can be used both for measurement and microcomputer protection of ele...
Beijing, China

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Overview

Current transformers (CTs) convert high alternating currents into a scaled secondary current for meters, relays and protection systems. Available as window, wound or bar types, CTs vary by ratio, accuracy class and saturation behavior. Proper selection focuses on rated primary current, burden, insulation, knee-point for protection use, and condition when buying used for substations, switchgear, or industrial panels.

FAQ

What should I check when buying a used CT?

Verify the nameplate ratio and accuracy class, inspect for physical damage or oil leaks, request recent ratio and insulation test reports, and confirm the CT type (wound/window/bar) and its knee-point if used for protection.

How should a CT be prepared and shipped safely?

Drain and seal oil-filled CTs if required, protect bushings and cores, short and ground the secondary terminals, secure the unit to prevent shock, and use a carrier experienced with electrical equipment plus insurance.

What routine maintenance and tests are essential for CTs?

Perform visual inspections, insulation resistance tests, ratio and polarity checks, check for oil contamination on liquid-filled units, and schedule periodic accuracy and dielectric tests per manufacturer guidelines.