MCB Thermal Verification and Calibration Test System (With Mechanical Fixture and DC Stepper Motor to calibrate MCBs online)

"To carry out 2.55*In test as per Table 7 (test c) of IEC 60898"

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.
Individual DC Constant Current Source with Fine Regulation; Multiplied Reliability and Graceful Degradation.
Current setting: Automatic within +/- 0.3 % of set value.
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.

Module Options (w r t maximum dc current)

10 A

20 A

100 A

200 A

Specification

I/p voltage

230V AC +/-10 %

230V AC +/-10 %

230V AC +/-10 %

230V AC +/-10 %

I/p frequency

50Hz

50Hz

50Hz

50Hz

O/p voltage

10V

5 V

2V

2V

O/p current (programmable)

0.5 to 10 A

1 to 20 A

5 to 100 A

10 to 200 A

Line Regulation

0.20%

0.20%

0.20%

0.20%

Load Regulation

0.50%

0.50%

0.50%

0.50%

Scalable up to

12 stations

12 stations

12 stations

12 stations

MCB Ratings covered for 2.55 test

0.5, 1,2,3 A

0.5, 1,2,3,4, 6 A

2, 3, 4, 6, 8,10, 13, 16, 20, 25, 32 A

4, 6, 8,10, 13, 16, 20, 25, 32, 40, 45,50, 63 A

The test system is designed and customized to carry out 2.55*In test 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.

The DC source is an SMPS based variable source of a conveniently low voltage and the user may simply select the model based on the MCB rating and tripping current (2.55*In or any other current value). The source is more accurate than the conventional electrical source in the sense that it is capable to correct any load or line accuracies instantaneously. The test current and test times (initial idle time, screwing time, maximum time) can be pre-configured on the microcontroller module.

The most unique feature of this system is its scalability: The user may choose 1 to n stations as per the production needs and the system is modular (one station is independent of another) giving the user flexibility of different test parameters on different stations. The user may simply buy a few modules in the beginning and may later choose to scale up the stations as the production of MCB ramps up.

The entire system, whether one station or multi station is PC interfaced and the software is in built with data logging and data analysis features. The software has a temperature correction factor that enables the user to accurately calibrate the MCBs at temperature other than the ambient as specified by the IEC.

The product is an excellent alternative to the conventional system in the MCB manufacturing industry which uses an inaccurate AC current source driven by a variac and a swamping impedance (introducing power inefficiency as well as harmonics).

Post An Enquiry

*
*
*
*

*

*

*

captcha