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ApplicationThe temperature monitor MASTERTEMP™ was developed to monitor the ambient and oil temperature, or top and bottom oil temperature, or top oil and OLTC with possibility differential temperature alarms and up to 3 (three) calculated winding hotspot Temperatures in transformers and reactors immersed in oil, MASTERTEMP™ can activate the fans protecting power and distribution transformer (ANSI 49I and ANSI 49).

Main Features

Aluminum EnclosureThe aluminum enclosure has high mechanical resistence creating a Faraday cage that increases the immunity of the electric circuit in cases of noise induction and electrical discharges. The enclosure works as a heat-sink extending the life of the MASTERTEMP. Reduced size 3.8x3.8x3.8 inch (98x98x98mm)

DisplayHigh brightness display with 04 (four) digits of 0,78 inch (20 mm) height, and decimal display of 0,51 inch (13 mm) height;

Keyboard and SoftwareUSE EASY, with fully intuitive setup menus, forms a perfect set for the user. To further facilitate, Mastertemp™ is supplied with a configuration software with graphics, reports, and additional resources.

CT Split-CoreCT Split-core for measurement of the load current of the transformer in order to calculate winding hotspot Temperatures.Mounting on standard DIN 35mm rail.

Pt 100Pt100 sensor with aluminum head (Ip65) and bulb of stainless steel for measurement of oil temperature.

Us aeeoftwareSy

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Its hardware was projected to endure severe working conditions. MASTERTEMP can be installed directly in the transformer panel, reactor, in the power substation yard, as well as in offshore drilling platforms and chemical industry. It meets all required levels of supportability and reliability in accordance with the IEC, DIN, IEEE, ABNT Standards.

Quality

Winding temperature calculated based on standards IEC 354-1991, IEEE C 57.91-1995 and NBR 5416-1997.

Input for current reading of CT0 to 10 A (True RMS - Split Core).

Indication of the final gradient temperature (Oil / Winding).

Percentage indication of transformer loading and - Pré-cooling function.

Operation temperature extended -40ºC to +85ºC (-40 to +185ºF).

MicroSD card to storage data (data-logger) up to 10 year of storage data (2 Gb).

Time meter to monitor fan operations.

2 Compensated input for sensors type PT 100.

5 Analog outputs for measured temperatures.

Digital output RS 485 with protocols MODBUS-RTU and DNP 3 (L2).

Controls up to 03 (three) groups of fans with intelligent exercise function.

13 Relays for signaling and commanding with 2 (two) programmable.

USB Front to configure through USE EASY software.

Maintenance Free internal clock powered with super-capacitor.

Password for access to configuration menu.

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Technical Data

Type Test

Power Supply 48 a 265 Vdc/Vca 50/60 Hz

Power Consumption < 15 w

Operation Temperature -40 a + 85°C (-40 to +185ºF)

Temperature Measurement Input

Current Measurement Input CT Split Core 0 to10A (True RMS)

5 (Five) configurable outputs with range, 0..1 mA / 0..5mA / 0..10mA 0..20mA and 4..20mA

Maximum error Analog Output

Contact Outputs 13 Relays - Potential free

Maximum Switching Power 70W / 250 VA

Maximum Switching Power 250 Vdc/Vac

Maximum Conduction Current 6,0 A

Comunications Protocols

Enclosure 3.8x3.8x3.8 Inch (98 x 98 x 98mm) – Alumínio

Fixation Fixed at the door panel

Degree of Protection (Front) IP 40

CT Split Core - Current Transformer

Measurement Range -55ºC to 200ºC (-67 to 392ºF)

Output Signal 4 to 20mA

Measurement Range / Maximum error 0 to 10 A / 1% end of the scale

Operation Temperature -40ºC to +85ºC (-40 to +185ºF)

USB Front Port USB Serial - 2.0

Input for MicroSD (Data logger) MicroSD 2Gb

2 - Pt100 ohm a 0°C a 3 wire

Analog Output

Maximum error Measurement Temperature

RS 485 - Modbus RTU and DNP 3.0 (L2)

0,25% end of the scale

0,25% end of the scale

Storage Temperature -50 a + 60°C (-58 to 140ºF)

Storage Temperature -50ºC to +60ºC (-58 to +140ºF)

· Insulation Voltage (IEC 60255-5): 2kV / 60Hz / 1 min. (to ground);· Voltage Impulse (IEC 60255-5): 1,2/50 seg. / 5kV / 3 neg. e 3 pos. / 5 seg. Interval;· Electrostatic Discharge (IEC 60255-22-2): Air mode = 8kV / Contact mode = 6 kV;· Irradiated electromagnetic field immunity (IEC61000-4-3): 80 a 1000 MHz / 10V/m;· Fast electrical transient immunity (IEC60255-22-4): Power/Input/Output=4KV/Serial port. 2kV;· Surge immunity (IEC60255-22-5): phase/neutral 1kV, 5 per polar. (±) - phase-ground/neutral-ground 2kV, 5 per polar (±);· Conduced electromagnetic perturbations immunity (IEC61000-4-6): 0,15 a 80 MHz / 10V/m;· Climatic test (IEC60068-21-14): -40ºC + 85ºC / 72 hours;· Vibration resistance (IEC60255-21-1): 3 axis / 10 a 150Hz / 2G / 160min/axis;· Vibration response (IEC60255-21-1): 3 axis / 0,075mm-10 a 58 Hz / 1G de 58 a 150 Hz / 8min/axis;

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