C50 — modular online monitoring system for power transformers (C54 / C59)
C50 is a modular online monitoring platform for power transformers at substations and power plants. In one device it collects data on bushings, OLTC, cooling, dissolved gases, oil and its protection system, and can also monitor circuit breakers and switchgear. The unit comes in two sizes, C54 and C59.
- Unit sizes
- C54 — up to 4 expansion boards; C59 — up to 9 expansion boards
- Power supply
- 110–240 V DC or 110–250 V AC (50–60 Hz); 48 V DC on request
- Operating temperature of unit and interface
- from −40 to 70 °C
- Communication
- 10/100 Base-T (RJ45) and FX optical; 2 × RS-485 plus optional RS-485 / RS-232 / optical serial port
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The open architecture of the C50 allows third-party multi-gas DGA analysers and moisture sensors to be connected. Data is exchanged over a serial channel in digital format, so measurement accuracy is preserved and additional diagnostic information is available from the instruments. Data is displayed on built-in web pages that are accessed remotely.
The C54 holds up to four expansion boards and the C59 up to nine. The processor module, communication module and universal power supply for 110–240 V DC or 110–250 V AC are mandatory. The processor module has a 10/100 Base-T (RJ45) port and an FX optical port with a built-in switch, and supports several SCADA connections. The communication module has two RS-485 ports and one additional RS-485, RS-232 or optical port, which can work as master or slave. Among the expansion boards are relay outputs with analogue inputs and outputs, a board with three Pt100 inputs and four current inputs, a board with 13 digital inputs, five Form C relays, voltage regulation, OLTC monitoring, bushing monitoring by the sum of currents or with a reference voltage from a VT, and a board with nine partial discharge inputs.
Analytics include an active moisture model and an advanced thermal model. The C50 calculates the hottest-spot temperature of the winding with allowance for the state of cooling, insulation ageing, efficiency and serviceability of the cooling system. For the OLTC it keeps tap-change counters for each position, calculates contact wear, monitors drive motor current and voltage and the temperature difference, and raises alarms on slow tap changes.
The system controls cooling in discrete steps, with two-speed fans, parallel pumps or variable-frequency fans. It performs main or backup voltage regulation with line drop compensation and parallel operation of transformers. This means fewer separate devices on each transformer and fewer possible points of failure.
Alarms are grouped into general, main and secondary and are sent to different recipients over several SCADA channels and by e-mail. The control unit and user interface work at temperatures from −40 to 70 °C and are mounted on a DIN rail or panel, and the interface is also available for a 19″ rack. Implementation is supported by the LIFESTREAM service, and data from the transformer fleet is consolidated in DynamicMetrix software.
Technical specifications
| Unit sizes | C54 — up to 4 expansion boards; C59 — up to 9 expansion boards |
|---|---|
| Power supply | 110–240 V DC or 110–250 V AC (50–60 Hz); 48 V DC on request |
| Operating temperature of unit and interface | from −40 to 70 °C |
| Communication | 10/100 Base-T (RJ45) and FX optical; 2 × RS-485 plus optional RS-485 / RS-232 / optical serial port |
| Base B board inputs | 3 × Pt100 (3-wire), 4 × CT |
| Analogue inputs | 0–1 mA, 4–20 mA, 0–10 V DC |
| Digital inputs | 13 per board; 30–276 V AC or 15–390 V DC |
| Bushing monitoring | up to 6 BAU+ sensors per board, up to 12 bushings |
| Partial discharge | 9 PD inputs per board |
| Mounting | DIN rail, panel; interface also available for a 19″ rack |
| Voltage regulation | main or backup; LDC by R and X; parallel operation |
Request a price and lead time
C50 — modular online monitoring system for power transformers (C54 / C59). We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 9031 80 38 00 |
|---|---|
| HS, 6 digits | 9031 80 |
| CN (EU) | 9031 80 38 |
| HTSUS (USA) | 9031 80 80 85 |
| China customs tariff | 9031 80 90 90 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
How many expansion boards do the C54 and C59 units hold?
The C54 holds up to 4 expansion boards and the C59 up to 9. The processor module, communication module and power supply are included in the base configuration.
What supply voltage does the C50 use?
The universal power supply runs on 110–240 V DC or 110–250 V AC (50–60 Hz). A 48 V DC version is available on request.
How many bushings can the C50 monitor?
The bushing monitoring board accepts up to 6 BAU+ sensors, and the system monitors up to 12 bushings. Bushing boards are installed in slots 1–4.
Similar equipment from other manufacturers
