The INNOFZ IB-Q201 dry type transformer temperature monitoring and controller is an embedded, flush-mounted unit designed to be recessed directly into the transformer enclosure rather than mounted on its surface. Built around PT100 platinum thermistor sensing, this dry type transformer temperature monitoring and controller continuously tracks three-phase winding temperature, automatically manages cooling fan operation, and provides alarm and trip protection to prevent overheating — combining real-time monitoring with active control in a single compact embedded unit.
Embedded vs. Wall-Mounted: Why Installation Method Matters
The "Q" in IB-Q201 designates an embedded dry type transformer temperature monitoring and controller, as opposed to the "L" series surface wall-mounted version. Rather than projecting outward from the transformer enclosure, the IB-Q201 is recessed into a cut-out opening so that only its front display and control panel remain visible, with the unit body sitting flush inside the transformer cabinet. This makes the IB-Q201 the preferred choice for transformer manufacturers and panel builders who need a low-profile temperature monitoring and controller that does not add bulk to the outside of the enclosure.
A Complete Monitoring and Control Solution, Not Just a Display
As a dry type transformer temperature monitoring and controller, the IB-Q201 performs five connected functions within one embedded enclosure:
- Monitoring — three-phase round-robin temperature display or maximum-value display across all monitored winding points
- Control — automatic and manual cooling fan start/stop, plus a periodic fan exerciser function to keep the fan mechanism functional during idle periods
- Protection — dedicated relay outputs for over-temperature alarm, over-temperature trip, and fault alarm
- Security — cabinet door-open alarm function to flag unauthorized access to the transformer enclosure
- Diagnostics — black-box data logging, analog self-test function, and digital compensation to maintain long-term measurement accuracy
Key Features
- Three-phase round-robin display and maximum-value display for fast identification of the hottest winding point
- Automatic/manual cooling fan start-stop with fan exerciser function
- Over-temperature alarm, over-temperature trip, and fault alarm relay outputs
- "Black box" historical data logging function for post-event analysis
- Analog self-test function and digital compensation for sustained measurement accuracy
- Cabinet door-open alarm function
- Compact embedded enclosure for flush installation into the transformer cabinet, minimizing external footprint
- Clear LED display with status indicators for Manual, Fan, Alarm, Trip, Error, and Backup conditions
Product Selection: IB-Q201 Function Codes
This dry type transformer temperature monitoring and controller platform is available in multiple function-code variants, allowing it to be matched to specific project monitoring and communication requirements:
| Model | Function |
|---|---|
| IB-Q201D | Three-phase round-robin/maximum-value display; automatic/manual fan start-stop; over-temperature alarm; over-temperature trip; fault alarm; black-box function; fan exerciser function; analog self-test function; digital compensation function; cabinet door-open alarm function |
| IB-Q201E | Standard IB-Q201D functions plus three or four independent 4–20mA analog current outputs |
| IB-Q201F | Standard IB-Q201D functions plus RS485/RS232 serial communication |
| IB-Q201G | Standard IB-Q201D functions plus one additional channel for control room/cabinet ambient temperature measurement and control |
| IB-Q201I | Standard IB-Q201D functions plus one additional channel for transformer core (silicon steel) temperature measurement and alarm |
| IB-Q201H | Standard IB-Q201D functions plus one additional channel for humidity measurement and control |
| IB-Q201L | Standard IB-Q201D functions plus cooling fan fault detection and alarm |
| IB-Q201C | Standard IB-Q201D functions plus PTC150 or PTC130 thermistor for interlocking control |
| IB-Q201TH | Standard IB-Q201D functions plus three-protection measures: anti-mold, anti-moisture, and anti-salt spray |
Common combined models include IB-Q201DL, IB-Q201DC, IB-Q201EFI, IB-Q201EFILC, IB-Q201DTH, and IB-Q301D. For example, IB-Q201F indicates: Q = embedded (flush-mounted) temperature monitoring and controller, 2 = AC220V working power supply (3 = AC380V), F = function code for RS485 communication. Function codes can be combined in the order E, F, G, I, L, H, C, TH; if only L, H, C, or TH functions are required without E/F/G/I, the prefix D is added (e.g. IB-Q201DL). Additional special requirements such as Ethernet communication, Profibus communication, multi-channel temperature measurement, or fiber optic temperature sensing are also available on request.
Applications
- Dry-type power transformer winding temperature monitoring and overheating protection with embedded, low-profile installation
- Transformer manufacturers and panel builders requiring a flush-mounted temperature monitoring and controller for a cleaner enclosure exterior
- Distribution substations and industrial transformer cabinets with limited external mounting space
- Projects requiring SCADA integration via 4–20mA or RS485/RS232 communication
- Coastal or humid environments requiring anti-mold, anti-moisture, and anti-salt spray protection
Technical Parameters
| Parameter | Specification |
|---|---|
| Model | IB-Q201 series (function codes per selection table above) |
| Ambient Operating Temperature | -20°C to +55°C |
| Ambient Humidity | <95% (at 25°C) |
| Working Voltage | AC 220V (+10%, -15%) |
| Working Frequency | 50Hz or 60Hz (±2Hz) |
| Measurement Range | -30.0°C to 240.0°C |
| Measurement Accuracy | ±1%FS (thermostat level 0.5, sensor class B) |
| Resolution | 0.1°C |
| Fan Output Capacity | 9A/250VAC |
| Control Output Capacity | 5A/250VAC; 5A/30VDC (resistive) |
| Power Dissipation | ≤8W |
| Panel Cut-Out Dimensions | 181mm × 231mm |
| External Dimensions | 200mm × 260mm × 85mm |
| Installation Method | Embedded / flush-mounted into transformer enclosure |
| Production Standard | JB/T7631-2016, Electronic Temperature Controller for Transformers (industry standard) |
| Quality Certification | ISO9001:2016 International Quality Management System Certification |
| EMC Test Standard | IEC61000-4:1995; GB/T17626-2008 |
Installation Method and Dimensions
This dry type transformer temperature monitoring and controller is installed by aligning the unit and its fixing brackets with the corresponding mounting holes cut into the transformer enclosure, then securing it in place with bolts through the fixing brackets. The panel cut-out measures 181mm × 231mm, with four mounting holes spaced at 100mm and 181mm horizontally and 231mm and 245mm vertically, matching the four mounting holes on the unit. The overall embedded enclosure depth is 85mm, allowing the unit to sit recessed within the transformer cabinet wall.
Terminal Wiring Overview
The IB-Q201D terminal layout provides: terminals 1–2 for AC220V power input, terminals 3–4 for single-phase fan output (L1/N1), terminals 5–6 for over-temperature alarm output, terminals 7–8 for over-temperature trip output, terminals 9–10 for fault alarm output, a D15 connector for the sensor cable input, and terminals 13–14 for the +5V door switch supply. Additional function variants (E/F/G/I/L/H/C/TH) add further terminals as needed — refer to the wiring diagram printed on the unit itself, which takes precedence if it differs from general reference diagrams.
Customization & Service
INNOFZ manufactures this dry type transformer temperature monitoring and controller to order, configuring the function code combination and protective treatment to match each project's monitoring, communication, and environmental requirements.
- Custom function code combination selected from the IB-Q201 selection table above
- Custom communication protocol: RS485/RS232, 4–20mA, Ethernet, or Profibus on request
- Multi-channel temperature measurement and fiber optic temperature sensing available on request
- Special anti-corrosion coating for coastal, humid, or industrial installation environments
- OEM/ODM manufacturing and private labeling for qualifying order quantities
Contact INNOFZ to confirm the right IB-Q201 function code combination and embedded panel cut-out for your dry type transformer temperature monitoring and controller project.
Frequently Asked Questions
What does the "Q" in IB-Q201 mean, and how is it different from the IB-L201?
"Q" designates an embedded, flush-mounted dry type transformer temperature monitoring and controller, recessed into the transformer enclosure so that only the front panel is visible. This differs from the "L" series, which is a surface wall-mounted version that projects outward from the mounting surface.
What is the panel cut-out size needed to install the IB-Q201?
The required cut-out is 181mm × 231mm, with four mounting holes positioned to match the holes on the unit — see the Installation Method and Dimensions section above for the full hole spacing.
Can this temperature monitoring and controller detect if the cooling fan fails?
Yes, with the IB-Q201L variant, which adds dedicated cooling fan fault detection and alarm functionality beyond the standard fan control features.
Is fiber optic temperature sensing available on the IB-Q201 platform?
The standard IB-Q201 series uses PT100 platinum thermistor sensing, but multi-channel temperature measurement and fiber optic temperature sensing options are available on request — contact INNOFZ for details specific to your project.
What should I check if the printed wiring diagram on my unit looks different from a reference diagram?
The wiring diagram printed directly on the IB-Q201 unit always takes precedence over general reference diagrams, since additional function variants may use different terminal assignments.
