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Leon Zhang sales consultant
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Phone/WhatsApp/Wechat: +86 13655813266
Transformer Monitoring
Transformer monitoring systems for dissolved gas analysis, temperature, moisture and online condition monitoring of power transformers.
Showing all 7 results
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HF-T-601 Smart Transformer Anti-Theft Monitoring Device
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HF-T-602 Transformer DGA Online Monitoring System
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HF-T-603 Transformer Partial Discharge Online Monitoring Device
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HF-T-604 Transformer Winding Temperature Monitoring
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HF-T-605 Transformer Core Clamp Earth Current Monitoring
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HF-T-608 Transformer Bushing Monitoring
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HF-T-609 Transformer Vibration Monitoring
Transformer Monitoring: Seven Parameters, One Substation
Seven online monitoring devices that watch different failure mechanisms on the same transformer. They are usually bought one or two at a time, in the order the operator has been bitten: theft first, then gas, then partial discharge, then the slower thermal and mechanical indicators.
Quick comparison
| Model | What it watches | Key figures from the datasheet |
|---|---|---|
| HF-T-601 | Theft and tampering | Anti-theft monitoring device for distribution transformers; see the product page for the sensor set and alarm chain. |
| HF-T-602 | Dissolved gas in oil | Nine gases (H2, CH4, C2H6, C2H4, C2H2, CO, CO2, O2, N2) plus moisture; IEC 61850, Modbus, Ethernet and RS485; IP66; −40 °C to +70 °C. |
| HF-T-603 | Partial discharge | Acoustic band 20 kHz–200 kHz with sensitivity ≥70 dB(V/(m/s)); used on HV/EHV, wind and solar booster, and industrial transformers. |
| HF-T-604 | Winding temperature | −40 °C to +260 °C; ±0.5 °C with Pt100 and ±0.3 °C with fluorescent fibre; expandable from 3 to 64 channels for 10–500 kV transformers. |
| HF-T-605 | Core clamp earth current | Current 1 mA–10 A and voltage 1 V–300 V, accuracy ±(2 % of reading + 2 digits), with four adjustable compensation levels. |
| HF-T-608 | Bushing condition | Tan δ from 0.001 to 0.3 at ±(1 % of reading + 0.001), capacitance 100–50 000 pF at ±(1 % + 1 pF), sampling every 5 minutes or faster. |
| HF-T-609 | Vibration | 20 Hz–10 kHz acoustic band, up to 6 channels per host unit, 1U rackmount for secondary control cabinets. |
Before you specify a set
- Start from the failure mode you have actually seen. Gas analysis catches incipient overheating and arcing; partial discharge catches insulation defects; bushing monitoring catches the tan δ drift that precedes a bushing flashover. These are different failure paths, not different grades of the same product.
- Bushing monitoring is the one most often left out. HF-T-608 tracks tan δ and capacitance continuously, which is the only way to see a bushing degrading between scheduled offline tests.
- Check how the data leaves the transformer. HF-T-602 speaks IEC 61850, Modbus, Ethernet and RS485. Protocol support on the others is on each datasheet, and it is worth confirming before ordering rather than after.
- Plan the channel count before the sensor count. HF-T-604 expands from 3 to 64 temperature channels and HF-T-609 supports up to 6 vibration channels per host — decide the final scope first, so the first purchase is not replaced by the second.
Common questions
Can these run on one transformer at the same time?
Yes. They are independent devices with their own sensors and their own communication, and they are normally mounted together in the same secondary cabinet.
Do they need modification to the transformer?
HF-T-609 is a 1U rackmount unit that installs inside the secondary control cabinet without modifying the main transformer, which makes it usable on retrofit projects.
How long does delivery take?
Standard models ship in 7–15 working days; configured or custom variants take 25–35 days.
Datasheets for each model are on the product pages and in the datasheets library. Test methods referenced in our guides follow the IEC and IEEE standards that apply to the quantity being measured.