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TCT2 - Trip Coil Tester and Timer
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Designed specifically to enable
HV circuit breaker trip coils to be tested at a reduced
voltage.
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Powered directly from the substation
battery
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Output precisely settable from 5 to 95% of
battery voltage
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Electronic regulation ensures guaranteed
constant voltage during testing
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80A current capable
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Trip-coil burnout protection
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Integrated Start/Stop timer
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To ensure
that circuit breaker operation is guaranteed under the most onerous
conditions placed on the substation tripping supply, circuit breaker
trip coils are specified to work with a minimum tripping voltage
much below the nominal battery voltage. The minimum trip voltage
test is described in a number of international and national
standards such as IEC 56, ANSI C37.09 etc.
Traditionally, this test was
performed by tapping the main tripping battery. This
method however should not be utilised as it presents a considerable
risk to testing personnel, battery and breaker being tested.
General purpose DC sources as well as
variac-based instruments are also unsuitable due to their
inability to maintain their output voltage precisely regulated at
the high peak currents drawn by trip-coils.
The TCT2 contains a very high speed
electronic voltage
regulator which will accurately maintain the output voltage constant
whilst very high peak currents are drawn, for a period long enough to allow the
operation of the trip coil. The precise level of test voltage
during the entire test is always known and guaranteed constant.
The integrated general purpose Start/Stop timer can
be used to display breaker operating times amongst other uses.
Features
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Input
- Ultra-wide 20 to
280 Vdc input
voltage operating range. Works with all tripping supply voltages used
worldwide
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Output
- User settable from 5 to 95% of input voltage
via multi-turn dial
- Precisely regulated to set value (2% max
deviation)
- Powerful 80A capability
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Voltmeter
- 0-300Vdc measuring range
- LCD, with backlight
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Accuracy: reading ±0.2V
- Measures both Input and Output voltages
- Software based calibration
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Protections
- Reverse polarity
- Output overload. Shutdown when current >80A
- External voltages on output
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Trip-Coil Burnout Protection
- Shutdown and warning when trip-coil draws
current continuously for >500 msec
Regulation fail Detector
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Timer
- Range: 0.000 to 999.999 sec. LCD with
backlight.
- Accuracy: (crystal controlled) ±100 ppm, ±1digit.
- Start Input: selectable as Internal (start on Pulse output)
or external voltage or contact (dry/wet) sensing, normally-open or
normally-closed.
- Stop Input: selectable as external voltage or contact
(dry/wet) sensing, normally-open or normally-closed.
- Input Voltage mode range: 3 to 300 V DC
- Input contact mode range: < 200 Ω
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Misc
- Field proven rugged design, in worldwide use
- Weight: 8.0Kg
- Case: IP65 Rated, 308x206x206 mm, 3mm Aluminium Shell
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Download the full
brochure - TCT2 Brochure.PDF (1.3Mb)
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