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The MCB Thermal Trip Calibration Test Bench is a fully automatic stand alone equipment

MCB Thermal Trip Calibration Test Bench (IEC 60898 Cl 9.10.1.2, Annex I.1, IS)

Routine Test

The test system is designed and customized to carry out 2.55*Intest as per Table 7 (test c) of IEC 60898 (also mentioned for routine testing of MCBs. The test is done at dc current to exactly analyze and correct the bimetallic properties of the MCB as far as thermal tripping is concerned. The unit comes with a pneumatically operated test fixture with in-built dc stepper motor that is controlled by a micro controller / PC to calibrate the breaker into a narrow tripping band programmed by the user.

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

Can test MCBs ranging from 0.5 Amp to 120 Amp with suitable model

Current setting: Automatic within +/- 0.3 % of set value

Individual DC Constant Current Source with Fine Regulation; Multiplied Reliability and Graceful Degradation

Pneumatically operated electro-mechanical fixtures with stepper motor for calibration of the MCB

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

I/p voltage : 230V AC +/-10 %

I/p frequency : 50Hz

O/p voltage : 10V for 10A, 5V for 20A, 2V for 100 & 200A

O/p current (programmable)

Line Regulation : 0.20%

Load Regulation : 0.50%

MCB Ratings covered for 2.55 test : 0.5, 1, 2, 4, 6, 10, 13, 16, 20, 25, 32, 40, 63, 80, 100 and 125 A (depending upon the range of the current source chosen)

Scalable up to : 12 stations

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 (upto 60 seconds) for 2.55*I_n.

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