• Vasavi Electronics

Relay Test System

Vasavi Electronics, manufacturer of automatic test equipment for transformers, offers a computerised Relay Test System, Models CVRT-S8 and S16. These are ideal for automatic testing of electro mechanical and reed relays (only DC relays) both for static and dynamic characteristics. This system scans at one stroke, all the parameters of the relay as per definition of test procedure. The test sequence can be pre-programmed and stored in the disk. One can select the tests as per requirement, and can include or exclude a test and have several options to match the test definitions. A semi skilled person can be engaged for actual testing, as he need not make any settings and need not interpret the readings. The system conducts the tests and gives Pass/Fail indication on overall test results. If a printer is connected, each test result will be printed. The system scans at a stroke all the following parameters:

• Warm-up voltage with specified number of cycles @ specified voltage
• Socket check and contact form test
• Coil resistance
• Pickup/pull in /operating voltage or current linear ramp method or step method
• Measure pickup contact gap FBB-LBB V or mA
• Drop away/drop out/release voltage or current linear ramp method or step method
• Drop away contact gap FFB-LFB V or mA
• % release drop away/pickup contact resistance of all contacts both front and back contacts
• Operating time @ set voltage or current
• Contact bounce or chattering time while operating @ above
• Release time @ set voltage or current
• Contact bounce or chattering time while release @ above
• Difference of operate time-release time
• Bridging test or non overlap test
• Transfer or traverse times while operate and release
• Operate time @ 2nd set voltage or current
• Release time @ 2nd set voltage or current
• Power consumption @ rated voltage
• Coil current @ rated voltage at room temperature
• Coil resistance corrected to 20^°C
• Timing waveform graph for all active contacts