SCR ELEKTRONIKS have developed “TEMPERATURE RISE TEST BENCH FOR MEDIUM VOLTAGE SWITCH BOARDS” to measure rise in temperature at various points as mentioned in standard at junctions.
The set-up consists of a True RMS Constant Current Source (to maintain the Current within + / - 1 % of set value with Digital Indication), PC based control system, Temperature data logging on PC, Servo-Controller and other indications. Digital voltmeter Primary Voltage) indicates the position of auto transformer (variac).
CT range selections: 100 A, 200 A, 400 A, 800 A, 1200 A, 1600 A, 2000A @10.5V.
Two operating modes are provided: PC & MANUAL.
12 Channels, Cr/Al type Thermocouple sensor for temperature sensing with PC datalogging.
Servo controlled mechanism for maintaining the Test Current at preset value in manual mode.
PC Based Temperature Datalogger with i)Isolation Amplifiers – For 12 Channels ii)Thermocouple Sensor – 12 Nos. iii) Data Loading Facility on PC with USB Port.
Input Supply: Two Phase 415 VAC, 50Amps,50 Hz Max.
Output – Single Phase 10.5V adjustable in steps with 3 Power Transformer and contactors.
Output Current – 100A to 2000A @ 10.5V constant current with the help of Servo Control – True RMS Sensing Servo Controller will be used to keep the current within +/-1% of set value.
Current Measurement – Wound type bar primary CT with 100, 200A, 400A, 800, 1200A, 1600 & 2000A. Taps will be provided to measure & control the current accurately. The selection of CT range will be with Rotary Selector Switch and contactors.
Indication : a) Digital Voltmeter : For variac position 0 to 500V AC Accuracy Class 1. b) Digital Servo Controller : For test current which reads the value in terms of CT Range. 0 to 1.000 count of CT Range Accuracy Class 1. c) CT with 100, 200A, 400A, 800, 1200A, 1600 & 2000A for current measurement with Accuracy Class 0.5, Burden 5VA. d) Shunt : 0.1 Ohms/50W for measurement of current on C.R.O.
Test ON/OFF, Reset, Emergency OFF Push Buttons. Protection : Over Current trip with 10sec. Delay. Mains ON/OFF with MCCB.
Panel will built in M.S. Fabricated trolley with powder coating of minimum 80 micron thickness. Suitable Nylon wheels will be provided for easy movement of trolley.
Digital Timer to Set ON time 0 to 99 Hours with alarm after end of test time.
The maximum current rating, output voltage and number of temperature channels can be customized. Also the system is available with PC / PLC / manual operation
The system is used to measure the temperature rise values of current carrying and other parts in switchboards that handle high current switching and distribution.
