CTIMe SC2000

Circuit Breaker Time Interval Meter for measuring closing and opening times of circuit breakers

Introductioncircuit breaker image
Circuit breakers are used in power generation and distribution networks as protective devices. They also perform the function of controlling, protecting, and isolating various electrical equipment and machinery used in industrial applications. They switch off the electrical circuit if an over current or short circuit occurs. If a circuit breaker takes too long to open, it could be catastrophic as it could cause equipment damage and danger to people.

Circuit breakers are mechanical components consisting of a number of moving parts, springs, washers, and linkages. Over a period of time, due to wear and tear, loss of lubrication, and ingress of dirt and other foreign materials these components may get jammed and prevent the circuit breaker from operating.

Measurement of the operating times of a circuit breaker is one of the important tests performed during periodic maintenance of a circuit breaker. First generation systems that were used for timing measurements made use of oscilloscopes for recording the timing curves. However, modern second generation equipment make use of digital timers with time-pulse conversion for measuring the circuit breaker operating times.

About CTIMe SC200

CTIMe SC2000 is a microprocessor-based second generation circuit breaker time interval meter. It measures the closing, opening, and CO times of various types of circuit breakers up to 400 kV. The equipment is capable of testing up to six Main and six PIR contacts at a time.

CTIMe SC2000 has a compact and lightweight construction. This makes it ideal for operation under hostile EHV switchyard conditions and offers reliable measurements for periodic maintenance and inspection.

User Benefits

  • Simultaneous measurement of 6 main and 6 PIR contacts
  • Easy to use with backlit LCD display and a special purpose keypad
  • Continuous indication of breaker contact status by using LEDs
  • Facility to measure the number of  bounces and bounce duration of each contact
  • Capable of measuring contact mismatch
  • Special operation of O–0.3 Sec–CO–3Min–CO
  • Detailed timing waveforms using sampling rates up to 10 kHz
  • Dual-powered with AC mains or through built-in Li-ion battery
  • Quick charging and long battery back-up provided by Li-ion battery
  • Intelligent battery management with protection from overcharging and deep discharge
  • Report printing with date and time stamp using on-board thermal printer
  • Up to 200 results can be stored along with date and time stamp on the internal memory
  • User friendly Windows software for downloading and analysing test results on a PC and generating test reports
  • Trend analysis of a specific breaker over time
  • Lightweight, rugged and compact construction (IP67 class)
  • Rugged and easy-to-connect test leads with a length of 15 meters for testing EHV circuit breakers

Specifications

Parameter Limits
Contact Timing Channels 12 (6 Main and 6 PIR)
Sampling Speed Selectable from 100 Hz to 10 kHz
Timing Range 1 to 100 seconds automatically selected as per sampling speed
Resolution 0.1 ms at 10 kHz and 10 ms at 100 Hz
Accuracy Value ± 0.05% ± 1 Digit
Breaker Control Two solid state contacts rated at 300V, 35A AC/DC for breaker operation
Trigger Options Close, Open, Close-Open
Display 4 lines x 20 characters backlit LCD
Printer Built-in 58 mm thermal printer
Memory 200 records
Built-in Battery  Li-ion, 11.1 V, 4 Ah
Power Input to Battery Charger Input to battery charger: 230 V AC, 50 Hz ± 10%
Charger output: 13.5 VDC, 1000 mA Max.
Instrument consumption: 15 VA
Communication Serial (RS 232C) and USB
Software Windows-based for downloading test results and analysis
Operating Environment  0 to 50°C, up to 95% RH (Non condensing)
Dimensions (LWD) mm  380 x 260 x 175
Instrument Weight 8 kg (approx.)
Test leads 15 meters with suitable crocodile clips
Instrument case IP 67 class rugged hard moulded
Calibration Traceable to NABL/direct NABL
Type test
  • IEC 364-4-41 Protection against electric shock
  • IEC 1010-1 Safety requirements for electrical equipment for Measurement, control & laboratory use.
  • IP 54/IEC 529 Weather Proof Standards.
  • IEC 68-2/ IS 9000 Basic Environmental Testing Procedures covering shock, bump and vibration tests.
  • IEC 61326 EMC StandardsIEC 359 Humidity
  • IEC 61000  EMI/EMC/ Safety environment requirement for EHV switchyard

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