MTeC - EPT202 Digital thermometer Messko

Transcription

1 MTeC - EPT202 Digital thermometer Messko

2 MTeC -EPT202 the all-roundermto ST160 und MTO STF 160 The main functions such as Power, Alarm, Trip, Error and the operating status of the individual fan groups are quickly identifiable by means of the LEDs in the control panel. An examination of the ageing behaviour of the insulation system of transformers and therefore the service life in particular shows that these are largely dependent on the temperature in the winding. This temperature is primarily determined by the load of the transformer, the parameterization of the cooling control and the overall design of the cooling equipment. The activation and deactivation of the radiator, controlled by the temperature of the oil or winding, are particularly important in this respect. A temperature monitoring system and fan control customized to the individual conditions posed by the respective transformer equipment firstly increases the expected service life of the transformer and secondly reduces the total losses through fan running times optimized for the load and temperature. The radiators are controlled individually according to the type of cooling. The new MTeC -EPT202 equipment generation (digital thermometer with loaddependent fan control) combines a number of functions for monitoring the temperature of transformers. The clear central display shows all of the equipment information for operating and programming the MTeC, according to the menu item. The basic device displays and monitors the temperature of the oil and winding. The maximum and minimum values for the temperatures and load current are recorded and can be called up later. Two analogue outputs and a RS485 interface are available for remote indication of the temperature values.

3 Navigation through the individual menu is child's play thanks to the cursor keys on the right-hand side next to the central display. You can intuitively navigate your way through the individual function areas. The input can be freely parameterised depending on which sensor you use to measure the oil temperature (4 ma ma or Pt100). We use safety screw terminals for communication and connecting the supply lines, control wires and sensor lines. In addition, these terminals simplify the assembly of the device in its place of installation. You can configure the individual main switching contacts so that they are assigned to either the oil temperature or winding temperature. It is also possible to switch each fan group manually.

4 In the "peak-value" menu item, you will find handy variants of "mechanical drag hands". Minimum/maximum values for the oil and winding temperatures and the maximum load current are recorded and displayed. The input can be freely parameterised depending on which sensor you use to measure the oil temperature (4 ma ma or Pt100). The main switching contacts can be checked extremely easily as part of the regular checks, using the Test function. All equipment functions continue to run in the background. You can configure the individual main switching contacts so that they are assigned to either the oil temperature or winding temperature. It is also possible to switch each fan group manually.

5 MTeC -EPT202 The functions at a glance The lifetime of your transformer substantial depends on the thermal aging of the winding. The MTeC calculates the service life already elapsed according to international standards. The new MTeC -EPT202 equipment generation (digital thermometer with loaddependent fan control) combines a number of functions for monitoring the temperature of transformers: + Measurement/display of the temperature of the oil and 1 to 3 windings + Oil level display for on-load tap-changer and transformer oil conservator + Intelligent (cooling type- and load-dependent) fan control + Calculation of residual service life in line with international standards + Storage of data + Remote monitoring and parameterization via a SCADA system or on site via PC + Reduction of power loss (fan) and noise emissions + Targeted monitoring and reduction of thermal load of transformer MTeC -EPT202 Modular structure Top oil temperature CT phase 1 Parameter Oil level CTphases 2 and 3 PT ma The outputs of the MTeC can be set as required. If you wish to connect another device at a later date, simply redefine the parameters of the output. EPT 202 OL/CT OL CT Analog Oil temperature, winding temperature SCADA Digital Analog Extensionmodules Oil level

6 MTeC Technical Data of EPT202 Protective housing Rail mounting: Aluminium housing, snaps on to mounting rail in line with DIN EN TH and TH 35-15, degree of protection IP 00 in line with IEC 60529, weight approx. 1.2 kg 19 sub-rack: 19 plug-in housing in line with DIN part 5, 223 x 133 x 178 mm (W x H x D) for mounting in 19 cabinet system, degree of protection IP 00 in line with IEC 60529, weight approx. 1.5 kg Flush panel mounting: Aluminium housing 270 x 200 x 133 mm (W x H x D) for panel cut-out 236 mm x 142 mm (W x H), degree of protection IP 00 in line with IEC 60529, weight approx. 1.5 kg Installation in ED from MR: 19 plug-in housing in line with DIN part 5, 483 x 133 x 178 mm (W x H x D), degree of protection IP 00 in line with IEC 60529, weight approx. 2.5 kg Operation: Storage: Control elements: Display: Status LEDs: Supply voltage: Temperature sensor: Current transformer input: Temperature range -25 C +70 C -30 C +85 C Control elements, displays 5 x function keys with tangible pressure point Monochrome display, White characters on blue illuminated background, 128 x 64 dot 1 x green LED for Power operating display 1 x yellow LED for Alarm contact 1 x red LED for TRIP contact 1 x red LED for ERROR contact 4 x yellow LEDs for S1, S2, S3 and S4 contacts Inputs 100 V AC 240 V AC, 50 Hz 400 Hz or 100 V DC 353 V DC, power consumption: max. 10 VA or W Pt100-Signal in line with IEC 751 in 2- or 3-conductor technology or 4 20 ma signal (active or passive), standard measuring range: -20 C +140 C (others available on request) Instrument transformers can be provided for other input signals such as 0 1 ma or 0 10 V. 0,5 5 A rated CT current, durability: 10 A for 8 hours, short-time current: 500 A for 1 second Outputs Analog outputs: 1 x oil temperature (Oil Temp.), temperature range: -20 C +140 C, 1 x winding temperature (Winding), temperature range: 0 C 160 C Both analog outputs can be set as required within the following ranges: 0 10 V 0 1 ma 4 20 ma (errorsignal < 3,6 ma) 4 20 ma (errorsignal > 22 ma) 0 20 ma (errorsignal > 22 ma) Interfaces: 1 x RS 232 on 9-pole D-Sub connector for parametrization and data logging via PC 1 x RS 485 on screw terminals 1 x SPI-Bus on 15-pole D-Sub connector for connecting additional modules Relais 4 x SPDT contacts for switching points S1 S4, make/break capability of contacts, AC: 250 V/12A, DC: 110 V/0.4 A 2 x SPDT contacts for ALARM and TRIP, make/break capability of contacts, AC: 250 V/5A, DC: 110 V/0.4 A 1 n/c contact for Error message, make/break capability of contact, AC: 250 V/5A, DC: 110 V/0.4 A Tests Elektrical safety: Class 1 protection as per IEC Pollution degree 2 as defined in IEC report Overvoltage category III as defined in IEC report ECE conformity: EMC Directive 89/336 EEC Low Voltage Directive 72/23 EEC

7 MTeC -EPT202 the all-rounder MTO ST160 und MTO STF 160 Transformer (optional) CT phase1 CT phase 2 CT phase 3 Oil temperature Oil level tank (optional) Oil level OLTCILTC Sensor MT-ST160SK-TT Pt100 Cooling control MTO- STF160TT + + TT-PWM60 Combi well Analog input Analog input Control cabinet RS485 RS232 Digital output Analog output oil temperature, winding temperature Signal contacts alarm, error, trip Analog output oil levels Control room C D1272 PQ 96 EI100 Signalling lamp D1272 EI100 operations center SCADA system

8 Messko GmbH 2005 Gablonzer Strasse Oberursel, Germany Phone +49 (0) Fax +49 (0) Please note: Certain aspects of the equipment delivered may differ from the information given in any of our publications. Subject to changes. IN 2075/01en 0105/ /01/2000 Art. no Printed in Germany Messko/Usa Messko