The test system is a special version of the thermal test test system in the sense that the test jig is primarily designed to hold and connect multi pole MCBs for thermal verification so that each pole can be verified to trip within the IEC time band after the MCB has been riveted. This test ensures the trip verification of MCB so as to trip all the 4 poles at once when overload is detected in one single pole. In short, this is a verification-only bench.
This test equipment also covers testing as per Indian Standard IS 8828 as well as Indonesian Standard SNI 8528-1 (BSN)
Fully Automatic ‘Stand Alone’ Option (i.e. with or without PC)
ON line Loading of MCBs
Individual DC Constant Current Source with Fine Regulation; Multiplied Reliability and Graceful Degradation
Current setting : Automatic within +/- 0.3 % of set value
PC based operation; Selection of MCB its parameters from PC and/or MTCM for stand alone option
Early, OK Late indication on each Individual Display Unit as well as on PC at same time
Data Acquisition on PC by Windows based Software for traceability and statistical analysis
PC based Panel equipped with Barcode scanner will be used for Verification of 100% Thermal characteristics of MCBs.
DC Constant Current source 0.5A – 200A for individual station with fine Regulation at suitable voltage will be used (Dual Current source will be used). Accuracy of the system to be better than Class 0.2.
Bench will be used for verification of MCBs of the current rating (maximum 200A) 0.5A, 1A, 1.6A, 2A, 3A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, & 63A at 2.55/3 times the rated current.
Panel will be able to test 5 MCB poles at a time with independent test fixture and control.
Each station will be provided with one Display Unit for controlling, test result and the sequence of operation. Each station module will measure the trip time of MCB under test, and will also indicate the result as Early, OK, Late and No Trip & same data will be transferred to PC immediately.
The type of MCB under test & its related parameters like time band, Current will be linked with the MCB Cat number and will be selectable through PC.
Temperature correction factor for test current / duration will be discussed and decided jointly (selectable through PC).
After selection of Cat No., it should be possible to load MCBs independently on each station. Each station should start the test after loaded MCB is scanned with Barcode Scanner. Systems will operate by Push Button.
Verification program will be as below : 0 – T1 : MCB trips indicating as “Early“ T1 – T2 : MCB trips indicating as “OK” (T1 to T2 is a time of the particular rating) T2 – T3 : MCB trips indicating as “Late” T4 : MCB trips indicating as “No Trip” (Where T1, T2, T3 & T4 indicate the Tim Pneumatically operated mechanical fixtures will be used to connect the MCB. Fixture will be suitable for testing of Single, Double, Three & Four pole MCB.
The product can be customized as per the number of stations: 1 (stand alone), 2, 4, 6, 8, 10 and 12 stations. Additionally, the product can be microccontroller based with each microcontroller controlling an individual station, or a PC based wherein the PC controls all the stations simultaneosuly and independenly of each other. The product is available as a standalone module with micro controller based control – without the use of PC as a low cost alternative with features as scalability and accuracy intact.
This product is used by leading MCB manufacturers on their production floor to test and calibrate the thermal tripping time for 2.55*I_n andverified to trip within the IEC time band after the MCB has been riveted.
