Electrical equipment package for galvanic isolation of high voltage equipment.

 

Purpose

 

For modernization of electric locomotive VL11M series ensuring electric circuits with galvanic isolation for measuring traction motors current values ​​ and voltage in the contact line coming from the high-voltage cabinet to the driver's desk visualization device during repair and refurbishment works. 

 

Provides:

 

DCU (data coding unit) is installed in a high-voltage cabinet of electric locomotive and is designed for:

- digital processing of analog signals coming to its inputs from voltage and current sensors, with subsequent transmission of information from these signals in digital form via a communication link;

- ensuring VSC with stabilized supply voltage;

- ensuring CT (current transducer) and VMU (voltage monitoring unit) with stabilized galvanically isolated supply voltage; - ensuring galvanic isolation with data communication link.

 

VMU (voltage monitoring unit) is installed in a high-voltage cabinet of electric locomotive and is designed for electronic conversion of input current, which is proportional to the applied voltage, into proportional output current with galvanic isolation between primary (power) and secondary (measuring) circuits.

 

CT (current transducer) is installed in a high-voltage cabinet of electric locomotive and is designed for electronic conversion of input current into proportional output current with galvanic isolation between primary (power) and secondary (measuring) circuits.

 

VSC (visualization signal conditioner) is installed in the driver’s cabin and is designed for processing of digital information coming via a communication link from DCU; generating and transmitting of digital data signal via a communication backbone ensuring galvanic isolation; receiving of digital data signal via a communication backbone ensuring galvanic isolation.

 

Technical characteristics:

 

Rated input current, rms value: A 1000
Input current conversion range: 0 ± 1500
Sensor isolation strength, 50 Hz, 1 min 6 kV
Conversion accuracy of input current value at IH, ss ± 0,5%
Nominal input voltage, rms value: 3 kV
Input voltage conversion range: 4.5 kV
Isolation strength of voltage sensor, 50 Hz, 1 min 9 kV
Conversion accuracy of input voltage value at VH, TA = 25 º C, no more than ± 1,2%

 

Operating conditions

 

Climatic version: UHL 3.1 (boreal climate) according to GOST 15150-69
Operating temperature range: - 50 ° C... +40 ° C
Mechanical design: M25 according to GOST 17516.1-90E
The average service life is not less than 28 years