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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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Ask
for the full brochure - TCT2 Brochure.PDF
(1.3Mb)
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