I. Overview
Relay protection tester is significant instrument of calibration and commissioning used for relay protection circuit and instrument of power generation, supply and consumption equipments in the power system and large plant and mining enterprises.
This instrument is composed of digital millisecond meter with fully-isolating dual channels and long time counting, large power AC and DC voltage, current output unit, high-precision multifunctional AC/DC digital ammeter and voltmeter, and logic control, overload protection and signal display unit with very strong functions; adds the power frequency phase meter and automatic reclosing test function.
The two input channels of millisecond meter are provided with complete electric isolation, without considering common-ground short-circuiting during the test, and it is particularly suitable for online electrical testing of dynamic characteristics of the relay. This is not in common relay protection tester and millisecond meter. The dual-channel signal can be made with idle contact. Positive (negative) pulse, test power source, automatic synchronization signal and positive (negative) pulse width can meet the time characteristic test and whole-set test for various relays. The phase meter is more suitable for the testing of complex protection. All the measured values are displayed in digital manner, which are intuitive and precise. This relay is a new-generation tool for protection checking.
II.Panel
"1" Output voltage digit meter; "2" Output current digit meter; "3" Digital millisecond meter display (with phase position display); "4" Power output indicator lamp; "5" Power output ON-OFF key; "6" Time counting start key; "7" Time stop key; "8" Reset key; "9" ZCH key; "10" Power switch; "11" Power output adjusting button; "13" DC current adjusting knob; "14" CH II input end jack socket; "15"CH II amplitude adjustment button; "16" CH II channel input selector switch; "17"CH I amplitude adjusting button; "18" CH I input end jack socket; "19" CH I channel input selector switch; "20" Power output selector key; "21" DC voltage selector switch; Others: see the marking of the panel for other output wiring terminal.
III. Technical paremeters
(I) Digital millisecond meter
1. Range: 99.9999S
2. Resolution: 0.1ms
3. Accuracy: ±0.001%±1digit
4. Measurement functions:
1) Positive and negative pulse width
2) With the breaking (making) of idle contact, positive (negative) pulse and circuit interruption (supply) of electricity, double-channel input can constitute 6×4=24 functions (Table 2 and 3 list the commonly used combinations).
5. The isolation voltage between two channels is bigger than 250VDC, 250VAC and the peak value is 354V.
| Input signal amplitude (V) |
5-15 |
15-40 |
40-120 |
120-250 |
| Trigger voltage (V) |
2.5±20% |
7.5±25% |
20±25% |
60±25% |
| Reliable and non-operating voltage (V) |
2 |
4 |
16 |
48 |
6. Input reactance ≥200KΩ
7. Refer to Table 1 for input signal range
(II) Digital phase meter
1. Scope of measurement: 360.0 degrees
2. Resolution: 0.1 degree
3. Accuracy: <±1%±1 character for input signal voltage ≥150mV, current ≥15mA
<1.5%±1 character for input signal voltage ≥50mV, current ≥50mA
(III) Digital voltmeter:
AC and DC voltage, digit display, maximum resolution 0.1V, accuracy 0.5%±1 character
(IV) Digital ammeter:
AC and DC current, digit display, resolution 0.1A, accuracy 0.5%±1 character
(V) Power source output:
1. AC voltage: 0~250V, continuously adjustable, maximum output power 1,000VA, with short circuit and overload protection, and current limit 4A.
2. AC current, 0~130A continuously adjustable, maximum output power 1,200VA, with short circuit and overload protection, and current limit 180A.
3. DC voltage output: 0-250V, continuously adjustable, with short circuit and overload protection, and current limit 2.5A.
4. DC fixed voltage 110V or 220V output, which can be outputted with AC voltage 0~250V or DC current 0~130A.
5. DC current output: 0~5A, continuously adjustable with short circuit protection, and current limit 5A
(VI) Others
1. Power source: 220±10%, 50/60Hz;
2. Ambient temperature for use: 0~40ºC, temperature ensuring the precision 15~35ºC;
3. Ambient temperature: 90ºC (25ºC);
4. Volume: 440×260×260;
5. Weight: 15kg;
IV.Accessories
1.Power supply cable...................................1 pc
2.Test cables................................................1 set
3.Operating manual.....................................1 pc
3.Calibration report......................................1 pc
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