INTEGO GM — online partial discharge monitor for generator stator insulation
INTEGO GM is an online partial discharge monitor for generator stator insulation with 4 channels and a 100 MHz sampling rate. It correlates PD with load and winding temperature, so trends keep their meaning even with frequent starts and variable operating modes.
- Channels
- 4 simultaneous (3 phases + 1)
- Sensors
- existing capacitive sensors
- Input range
- > 20 V (peak-to-peak)
- Resolution
- 12 bit (500 µV); amplitude < 5 %, time 10 ns
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
INTEGO GM is installed on power plant generators for continuous monitoring of stator winding insulation by partial discharges. The PD trend over time shows how fast the insulation is ageing, but measurements can be compared correctly only at the same load, temperature and voltage. The standards IEC 60034-27-2 and IEEE 1434 recommend varying the operating mode during online measurements, which is rarely done in service. This monitor correlates each PD event with the operating mode of the machine and sorts the data by operating conditions.
A weekly summary of discharge energy, the PDE (PD Energy) map, is generated for different modes, including start-up and shutdown. The monitor counts starts and running hours, so it suits generators in flexible duty and with variable load. A white paper includes the PDE map of a 300 MVA turbogenerator, where activity was concentrated at high temperature at 140–300 MW. Data is presented at three levels. The basic level gives an instant picture of the condition without expert interpretation, the extended level contains trend parameters (Qmax, Qm+, Qm−, NQN, repetition rate) in mV and nC, and the research level opens PRPD patterns, correlation maps and pulse amplitude analysis according to IEEE 1434-2014 (Annex C).
The hardware has 4 simultaneous channels, three phases and an additional one, and works with existing capacitive sensors. The input range is over 20 V peak-to-peak, resolution is 12 bit (500 µV), and the sampling rate is 100 MHz. There are two bands, ultra-wide up to 50 MHz and wide according to IEC 60270. Dynamic noise suppression works automatically, so alarms work from the first day. The archive on a 32 GB SSD is designed for more than 5 years.
Communication uses Modbus, optionally DNP3 and IEC 61850, via USB, RS-232, RS-485, Ethernet, 3G, optical fibre or modem. There are 4 alarm relays, and inputs 4×PT100, 3×4–20 mA and 6 digital. Supply is 90–250 V AC, consumption 100 W. The IP56 enclosure works at a temperature of −45…+55 °C and humidity of 0–100 %, and installation is possible on a running machine. The built-in web server needs no special software, and the offline program compares several generators with each other.
Technical specifications
| Channels | 4 simultaneous (3 phases + 1) |
|---|---|
| Sensors | existing capacitive sensors |
| Input range | > 20 V (peak-to-peak) |
| Resolution | 12 bit (500 µV); amplitude < 5 %, time 10 ns |
| Sampling rate | 100 MHz |
| Band | ultra-wide (< 50 MHz) and wide according to IEC 60270 |
| Storage | 32 GB SSD, > 5 years |
| Communication | Modbus; optional DNP3, IEC 61850; USB, RS-232, RS-485, Ethernet, 3G |
| Inputs/outputs | 4 relays, 4×PT100, 3×4–20 mA, 1×AC, 6 digital 24 V |
| Power supply | 90–250 V AC, 47–63 Hz, 100 W |
| Conditions | −45…+55 °C, 0–100 % RH, IP56 |
| Analysis standard | IEEE 1434-2014, Annex C |
Request a price and lead time
INTEGO GM — online partial discharge monitor for generator stator insulation. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 9030 89 00 00 |
|---|---|
| HS, 6 digits | 9030 89 |
| CN (EU) | 9030 89 00 |
| HTSUS (USA) | 9030 89 01 00 |
| China customs tariff | 9030 89 90 00 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
Which sensors are needed for INTEGO GM?
The monitor connects to the existing capacitive sensors of the generator. It has 4 simultaneous channels, three phase channels and one additional.
What are the sampling rate and the measurement band?
The sampling rate is 100 MHz and the resolution is 12 bit. The band is ultra-wide up to 50 MHz, and there is also a wide band according to IEC 60270.
Which protocols does the monitor use to transmit data?
The basic protocol is Modbus, optionally DNP3 and IEC 61850. Physically, communication goes via USB, RS-232, RS-485, Ethernet or 3G.
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