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T2000
User Manual
32 pgs850.88 Kb0

ISA T2000 User Manual

DATE: 04/10/20011 DOC.SIE10110 REV.6
T2000 TEST SET
for testing CT’s, PT’s,
primary injections and relay tests
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1 INTRODUCTION ....................................................................................................................................................... 4
2 APPLICABLE STANDARDS ...................................................................................................................................... 7
3 CHARACTERISTICS ................................................................................................................................................ 8
3.1 FOREWORD ............................................................................................................................................................... 8
3.2 MAIN GENERATOR .................................................................................................................................................... 8
3.2.1 High AC current ............................................................................................................................................... 8
3.2.2 Low AC current ................................................................................................................................................. 8
3.2.3 Low DC current ................................................................................................................................................ 9
3.2.4 Current impulses ............................................................................................................................................... 9
3.2.5 High AC voltage .............................................................................................................................................. 10
3.2.6 Low AC voltage ............................................................................................................................................... 10
3.2.7 Other features of main outputs ....................................................................................................................... 10
3.3 AUXILIARY CONTACT .............................................................................................................................................. 10
3.4 TIMER ..................................................................................................................................................................... 11
3.5 OUTPUTS MEASUREMENT......................................................................................................................................... 11
3.5.1 Current and voltage ........................................................................................................................................ 11
3.5.2 Phase angle ..................................................................................................................................................... 13
3.5.3 Other measurements ....................................................................................................................................... 14
3.6 EXTERNAL INPUTS MEASUREMENT ......................................................................................................................... 14
3.6.1 Current measurement ..................................................................................................................................... 14
3.6.2 Voltage measurement ...................................................................................................................................... 15
3.6.3 Other measurements ....................................................................................................................................... 15
3.7 DISPLAY .................................................................................................................................................................. 16
3.8 TEST CONTROL ........................................................................................................................................................ 16
3.8.1 Relay selection ................................................................................................................................................. 16
3.8.2 Transformers selection ................................................................................................................................... 16
3.9 MENU SELECTIONS .................................................................................................................................................. 17
3.9.1 Relay selection ................................................................................................................................................. 17
3.9.2 Transformers selection ................................................................................................................................... 20
3.10 CONNECTION CABLES ........................................................................................................................................... 22
3.11 OTHER CHARACTERISTICS ..................................................................................................................................... 23
3.12 OPTIONS ................................................................................................................................................................ 23
3.12.1 Power supply code PII20110 ........................................................................................................................ 23
3.12.2 Optional high voltage output 1200 V; codes PII30110 (supply 230 V) or PII40110 (supply 110 V) ......... 24
3.12.3 Model T2000E, code PII50110 .................................................................................................................... 24
3.12.4 Transit cases .................................................................................................................................................. 24
3.12.5 Current clamp code PII16102 ...................................................................................................................... 25
3.12.6 Thermal printer PII14102 ............................................................................................................................ 26
3.12.7 BU2000: very high AC current boosters ...................................................................................................... 26
3.12.8 High I DC module PII13102 ........................................................................................................................ 30
3.12.9 SU3000 Safety device for the line impedance measurement, code ZII26102 ............................................ 30
3.12.10 FT/1000 current filter, code PII16093 ....................................................................................................... 31
3.12.11 Earth resistance and resistivity test kit, code PII19102 ............................................................................. 31
4 PROTECTIONS ........................................................................................................................................................ 33
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1 I NTRODUCTION
T2000 allows performing all tests on current and voltage transformers, and of some protection relays. The following table lists the tests that can be performed on CT and VT.
N.
TEST OF
TEST DESCRIPTION
1
CT
Ratio, Voltage mode
2
CT
Ratio, polarity and burden
3
CT
Burden; secondary side
4
CT
Excitation curve
5
CT
Winding or burden resistance
6
CT
Voltage withstand
7
CT
Polarity by impulses
8
VT
Ratio; polarity
9
VT
Burden, secondary side
10
VT
Ratio, electronic transformers
11
VT
Voltage withstand
12
VT
Secondary over-current protection
13
PT
Ratio per TAP
14
PT
Resistance of Tap Changer contacts
15
PT
Tap Changer dynamic resistance test
16 R Ground resistance and resistivity
Tests are performed in accordance with the following IEC standards: EN 60044-1; EN 60044-2; EN 60044-5; EN 60044-7; EN 60044-8; EN 60076-1, and also in accordance with ANSI/IEEE C57.13.1.
The following table lists the tests that can be performed on protection relays (FW revision 1.40).
Type of relay
IEEE code
- Thermal
26
- Over/under-voltage
27 - 59
- Under current
37
- Instantaneous overcurrent
50
- Ground fault
50N
- Timed overcurrent
51
- Circuit breaker
52
- Automatic reclose
79
- Tripping relay
94
- Timers
In addition to the above, T2000 can test the impedance and coupling coefficient of overhead lines.
With external options, T2000 can test: . With the High IDC module, up to 400 A: contact resistances, in the micro-Ohm range; . With the current booster: primary tests, up to 2000 A; with the very high current booster option, up to 4000 A.
The basic T2000 function is to generate current and voltages, as requested by the type of test to be performed, that is selected on the LCD screen by means of the multi-function knob. Test results are kept in memory, and can be transferred to a PC at a later time, along with settings.
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The instrument contains a generator, with six outputs: High AC current; Low AC current; Low DC current; Current impulses; High AC voltage; Low AC voltage.
The selected output is adjustable and metered on the large, graphic LCD display. With the multi­purpose knob and the LCD display it is possible to enter the MENU mode, that allows to set many functions, that make T2000 a very powerful testing device, with manual and semi-automatic testing capabilities, and with the possibility to transfer test results to a PC via the RS232 interface. These results can be recorded, displayed and analysed by the powerful TDMS software, which operates with all WINDOWS versions.
The ease of operation has been the first goal of T2000: this is why the LCD is graphic, and so large. With it, the dialogue in MENU mode is made easy. Besides, all T2000 outputs relevant to the selected test are continuously measured, and output values are displayed, with no extra effort to the operator. Also the show waveform feature can be of help: any doubt about strange measurements, distortion and so on can be solved.
Additional feature: two meters, current and voltage, with independent inputs, and with High and Low inputs each, allow measuring CT or VT outputs or any other source.
The instrument is housed in a transportable aluminium box, which is provided with removable cover and handles for ease of transportation. The picture shows T2000 without the protection cover.
The following is the list of available options:
1. Power supply 110 V, to be specified at order;
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2. Optional high voltage 1200 V, instead of 3000 V (better choice for 5 A rated CT’s), to be
specified at order;
3. T2000E, model with high voltage at 1200 V and the high current output power boosted to
850 VA;
4. Transit cases: moulded plastic or aluminium;
5. Secondary current clamp meter;
6. Local thermal printer;
7. BU2000: very high current booster, for currents up to 4000 A AC, for primary injection tests;
8. High IDC current generator module, up to 400 A DC, for the measurement of joint
resistances;
9. SU3000: protection module for line impedance measurement.
10. FT/100: filter for highly inductive loads, that tend to distort the current waveform.
11. Cables and electrodes kit for the measurement of plant earth resistance, and soil resistivity.
NOTE: WINDOWS is a trademark of MICROSOFT inc.
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2 APPLICABLE STANDARDS
The test set conforms to the EEC directives regarding Electromagnetic Compatibility and Low Voltage instruments.
A) Electromagnetic Compatibility: Directive no. 2004/108/EC. Applicable Standard : EN61326-1 + A1 + A2.
EMISSION
- EN 61000-3-2: Harmonic content of power supply. Acceptable limits: basic.
- EN 61000-3-3: Limitation of voltage fluctuations and flicker. Acceptable limits: basic.
- CISPR16 (EN 55011 class A): Limits and measurement methods of radio-electric disturbances for industrial, medical and scientific instruments at radio-electric frequencies. Acceptable limits for conducted emission: . 0.15-0.5 MHz: 79 dB pk; 66 dB avg. . 0.5-5 MHz: 73 dB pk; 60 dB avg. . 5-30 MHz: 73 dB pk; 60 dB avg. Acceptable limits for radiated emission: . 30-230 MHz: 40 dB (30 m) . 230-1000 MHz: 47 dB (30 m)
IMMUNITY
- EN 61000-4-2: Immunity tests for ESD. Test values: 8 kV in air; 4 kV in contact.
- EN 61000-4-3; Immunity tests for radio frequency interference. Test values (f= 900 5 MHz): field 10 V/m, modulated AM 80%; 1 kHz
- EN 61000-4-4; Immunity tests for high speed transients (burst). Test values: 2 kV peak; 5/50 ns.
- EN 61000-4-5; Immunity tests for surge. Test values: 1 kV peak differential mode; 2 kV peak common mode; 1.2/50 us.
- EN 61000-4-6: immunity to low-voltage sinusoidal waveform. Test values: 0.15-80 MHz, 10 Vrms, 80% AM 1 kHz.
- EN 61000-4-8: Immunity tests for low frequency magnetic fields. Test values: 30 Arms/m.
- EN 61000-4-11: Immunity test for power supply dops. Test value: 1 cycle; 100% drop.
B) Low Voltage Directive:
- - Directive n. 2006/95/EC.
- Applicable standard: EN 61010-1. In particular, for a pollution degree 2: dielectric rigidity 1.4 kV AC, 1 minute. The rigidity is 4600 V AC 1 minute between the high voltage output and the rest of inputs and outputs.
- Inputs/outputs protection: IP 2X, per IEC 60529, for all but high voltage outputs; IP4X for high voltage outputs.
- Operating temperature: 0 to 50 °C; storage: -20 °C to 70 °C.
- Relative humidity : 5 - 95%, without condensing.
- Vibration: IEC 68-2-6 (20 m/s^2 at 10 – 150 Hz);
- Shock: IEC 68-2-27 (15 g; 11 ms; half-sine).
- Altitude: less than 2000 m.
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3 CHARACTERISTICS
3.1 FOREWORD
T2000 incorporates a generator with six outputs. When an output is generated, also all other outputs are present at sockets, unless for the high AC voltage, that can be generated only if it is selected and confirmed by a key.
The generator is made of a variable transformer followed by a transformer. The variable transformer does not reach the zero position; so, when you are adjusting the output current on a low burden, the minimum current can be up to 5% of the range. If this is a problem on relay tests, select the 60 VA power: the current is reduced to one fifth.
3.2 MAIN GENERATOR
The main generator has six outputs: High AC current; Low AC current; Low DC current; Current impulses; High AC voltage; Low AC voltage. Output adjustment is performed via a knob. The following specification applies to the separate usage of these outputs.
3.2.1 High AC current
- Output characteristics: see table below.
CURRENT
OUTPUT
A
OUTPUT
POWER
VA
LOAD
TIME
s
RECOVERY
TIME
min
100
600
STEADY
-
150
800
15 min
30
200
1000
4 min
15
400
1600
15
5
600
2000 5 3
800
2000 1 2
- Connection: two high power sockets, with safety protections.
3.2.2 Low AC current
- Output characteristics: see table below.
1) NOMINAL POWER 300 VA
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RANGE
A AC
CURRENT
OUTPUT
A
OUTPUT
POWER
VA
LOAD
TIME
s
RECOVERY
TIME
min
40
12
300
STEADY
-
18 15 min
30
24 4 min
15
36
800
15
5
48 5
3
60
1000 1 2
10
5
400
STEADY
-
7.5 15 min
30
10
800
60
15
15 30
10
20
1000
15
5
2) NOMINAL POWER 60 VA
RANGE
A AC
CURRENT
OUTPUT
A
OUTPUT
POWER
VA
MAX. TEST DURATION
s
RECOVERY
TIME
s
40
12
60
STEADY
-
17 10 min
30
23 60
10
36 1
2
10
5
60
STEADY
- 6
10 min
45 7
60
2
10 1,5
2
- Power selection: via menu.
- Connection: three high current safety sockets.
3.2.3 Low DC current
- Output characteristics: see table below.
CURRENT
OUTPUT
A
LOAD
RESIST.
Ohm
OUTPUT
POWER
VA
LOAD
TIME
min
RECOVERY
TIME
min
10 0 0
STEADY
- 3 2
18
STEADY
- 1 8 8 STEADY
-
- Type of DC voltage: unregulated, via diode bridge rectifier and capacitor, plus limiting resistor.
- Output connection: two safety sockets.
3.2.4 Current impulses
Current impulses are only positive; this solves the problem of the ambiguity of secondary impulse polarity that is found if a DC voltage is used.
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- Type of waveform: R-C discharge; polarity: positive.
- Current range: from 0 to 10 A peak.
- Repetition rate: a pulse every 3 s.
- Output connection: two safety sockets.
3.2.5 High AC voltage
- Type of generator: variable transformer and high voltage transformer.
- Output characteristics: see table below.
VOLTAGE
OUTPUT
V
CURRENT
OUTPUT
A
OUTPUT
POWER
VA
LOAD
TIME
Min
RECOVERY
TIME
min
3000 2500
0.2
0.6
600
1500
STEADY
1 - 8
- Output connection: two H.V. safety sockets.
3.2.6 Low AC voltage
- The AC voltage is isolated from the high AC current.
- AC voltage range: 250 V.
- Available power and duty cycle: see table below.
- Connection: two safety banana sockets.
RANGE
V AC
VOLTAGE
OUTPUT
V
OUTPUT
POWER
VA
LOAD
TIME
min
RECOVERY
TIME
min
250
250
125
STEADY
-
220
250
3
9
3.2.7 Other features of main outputs
- Zero crossing control. Main AC outputs are generated and stopped as the output waveform is zero. This implies that in mode ON+TIME the output drops to zero with a delay from 0 to one cycle after STOP is detected.
- Over-current alarm message.
- Thermal protection: by NTC. The operator is alerted by a message.
- Output adjustment: from less than 5% to 100% of the output.
- Output measurement. The used output is software selected; the selected socket is confirmed by a light.
3.3 AUXILIARY CONTACT
- Possibility to delay the auxiliary contact switch with respect to test start. Delay range: from 0 to
99.99 s.
- Contacts range: 5 A; 250 V AC; 120 V DC
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3.4 TIMER
The electronic digital timer has a fully automatic stop, both for make and break of the input, that can be either a clean contact or a contact under voltage. All selections are menu-driven via the multi-function knob.
- Characteristics of Stop input: .. Input connection: two banana sockets; .. Input may be selected as Normal Open or Normal Close. It is possible to select timer stop on input level transition; .. Type of input: either dry or under voltage; selection via the multi-function knob. Maximum input: 250V AC or 275 V DC; .. With dry input selection, the wetting voltage is 24 V; the test current is 3 mA nominal; .. With voltage input selection, two thresholds can be selected: 24 V or 80 V; .. Selections are displayed on the front panel by 5 dedicated lights; .. When the input is closed or with voltage an LED turns on; .. When the relay intervenes the TRIP light turns on; .. Wrong selection protection. If voltage is applied when clean input is selected, input circuits are not damaged; .. Timer start: as the fault is generated.
- Available measurement: elapsed time between test start and STOP input.
- Time can be metered as seconds or cycles. Metering range, in seconds: see table.
Range
Resolution
Accuracy
From 0 to 9.999 s
1 ms
± (1 ms + 0.005%)
From 10.00 to 99.99 s
10 ms
± (10 ms + 0.005%)
From 100.0 to 999.9 s
100 ms
± (100 ms + 0.005%)
From 1000 to 9999 s
1 s
± (1 s + 0.005%)
. Metering range, in cycles, selectable at 50 Hz or at 60 Hz.
Range
Resolution
Accuracy
From 0 to 1,000 (Equal to 19.998 s @ 50 Hz;
16.665 s @ 60 Hz)
0.1 cycles
± (0.1 cycles + 0.005%)
From 1000 to 499,998.5 cycles @ 50 Hz; From 1000 to 599,998 cycles @ 60 Hz (Equal to 9999 s)
1 cycle
± (1 cycle + 0.005%)
- Display reset: automatic, at test start.
3.5 OUTPUTS MEASUREMENT
3.5.1 Current and voltage
- The displayed measurements follow the test selection.
- Type of measurement: true rms for AC outputs; average for DC outputs.
- Readings, resolution and accuracy: see table. Note that the available ranges can be greater than the maximum value of the output to which the load is connected: this means that higher values can be
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