This equipment comprises of high current source for testing of circuit breakers with additional facility for temperature rise testing (thus incorporating testing for moulded case, vacuum & air circuit breakers as per IEC 60947-2). The system integrates a servo controlled source with closed loop current feedback to maintain the current constant. It has the necessary instrumentation for maintaining current at full load & other conditions arising in testing at high current. The bench has a PC based control system with temperature data logger (24 channel with ch-ch isolation amplifiers). The data logger displays as well as stores a set of temperature values with time.
Software Features: 1.Fully automatic testing with pre-programmed test sequence for Overload Test, Short-circuit Test & Temperature Rise Test (additional option: current cycling test) 2. Available in multi-pole testing options 3. Drop down menu in the software to once select the type (rating or calibre) of Circuit Breaker: Rest of the test parameters get selected automatically (User can simply jump from one type of test model to other instantly) 4. User can define test parameters for any circuit breaker under test. The test sequence is carried out automatically with full control of supervisor. By default, IEC based test parameters & sequence is automatically configured (Referred standard is 60947-2). Two clauses, viz. 7.2.1.2.4 and 8.3.3.7 are chosen as a base for software. 5. TestWare Software: NI LabVIEW based for user interface, settings selection, process control & report generation 6. Temperature Rise software module 7. Temperature Curves 8. Printer configurable
Hardware Features: 1.Servo Controlled Regulation ensures stable voltage at the output (with in-built instrumentation for current regulation at any load for testing circuit breakers). 2. 24 temperature sensors with ch-ch isolation with PC interface 3.Calibrated high end CTs for measurement accuracy 4. Point on Wave Firing system for accurate phase angle 5. Transient Recording facility for current 6. Can test relays, heavy duty switches, circuit breakers, transformers (The high current source can be used for any other application wherein a constant current is required to be sourced) 7. PC Interface module specially selected for this application 8. Castor Wheels 9. Output on copper bus-bars 10. Emergency OFF Push Button 11. Protection & Safety features
Specifications of 4000 A continuous current model: 1. 440 V, 3 phase, 50 Hz input 2. Open Circuit output voltage: 0.2/0.4 to 10 V 3. Output current programmable up to 4000 A continuous; 6000 A for 30 min ON and 30 min OFF; 9000 A for 1 min ON and 10 min OFF; 40000 A for 1 sec ON and 2 min OFF 4. Temperature rise as per IEC conformance / customized 5. PC provided: IBM or Dell or HP or Lenovo PC with NI LabVIEW based TestwareTM 6. 500 VA branded UPS (optional)
Specifications of 7500 A continuous current model: 1. 440 V, 3 phase, 50 Hz input 2. Open Circuit output voltage: 13.3 V 3. Output current programmable up to 7500 A continuous; 10000 A for 30 min ON and 30 min OFF; 15000 A for 1 min ON and 10 min OFF; 75000 A for 1 sec ON and 2 min OFF 4. Temperature rise as per IEC conformance / customized 5. PC provided: IBM or Dell or HP or Lenovo PC with NI LabVIEW based TestwareTM 6. 500 VA branded UPS (optional)
The system usually comes in two current ranges - 4000 A and 7500 A aximum. However, more user defined current values are available as per the customer specifications
The system is used to test the time - current tripping and non tripping characteristics with fully automatic operation on PC with temperature, current and time curves for graphical analysis
