Vibration Monitoring of Power Transformer Cooling Auxiliaries at CHP Plants
Oil pumps, radiator fans and water-cooling pumps on step-up transformers are a hidden CHP outage source. Bently Nevada 3500/42M, Orbit DCM and 1900/65A for transformer yard auxiliaries.
⚠️ EN version — draft. Ready to publish once kk/en routing (i18n) is implemented across the site.
The step-up transformer at a CHP plant is a decades-long asset; its cooling auxiliaries — oil circulation pumps, radiator fans, water-cooling pumps, OLTC drives — fail far more often. Loss of oil flow at full load trips the transformer via gas protection or thermal runaway.
Monitoring architecture:
- Existing 3500 rack on the turbine → add 3500/42M channels for main/standby oil pumps and fans; trend in System 1.
- No rack yet → Orbit DCM or 1900/65A with Velomitor on critical pumps.
Vibration on auxiliaries is an early layer before DGA shows dissolved-gas growth — see companion methods to DGA. Pair with Rapidox SF₆ checks on bay switchgear.
Do not copy turbine alarm limits onto 45 kW pumps — use ISO 10816-3 groups 3–4. Scope: CHP and thermal power; not oil & gas.
Discuss a project for your transformer yard.
Equipment in this article
3500/42M — 3500 monitoring module
4-channel proximitor/seismic monitor for critical turbomachinery and API 670 pro...
System 1 — condition monitoring platform
Flagship Bently Nevada condition monitoring and diagnostics platform
Orbit DCM — Orbit DCM Distributed Monitor
Distributed condition monitoring for mining conveyors, crushers and mobile plant...
1900/65A — general purpose equipment monitor
Universal 2-channel vibration monitor with 4–20 mA outputs for general industry
330500 Series — Velomitor Velocity Sensor
Bently Nevada Velomitor velocity sensor for vibration and condition monitoring —...
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