• Frequency 50 and 60 Hz

• Operative range 47-61 Hz

• Operating time Fixed at 3 or 10 seconds

• Contact disengaging time 150 ms

• Drop off/pick up ratio > 85% after 3 second delay > 98% before 3 second delay Thermal Rating

• Continuous 600 Vrms per phase on all three phases simultaneously (at any setting)

• Short time The relay will withstand 2 kVrms per phase, for 3 seconds on all three phases simultaneously (at any setting

Q1: What is the GE ALSTOM AREVA MVTP31V1CB0751E designed to monitor?
A1: It monitors busbar protection circuits to detect open buswires and current transformer faults.

Q2: What type of relay is the MVTP31 version?
A2: It is a three-phase relay designed for continuous supervision in high-impedance protection schemes.

Q3: How is the voltage setting adjusted on this relay?
A3: The setting range (1–16 V) is adjusted using DIL switches on the front panel.

Q4: What happens when the monitored voltage exceeds the preset level?
A4: The relay activates an output after a preset delay of 3 or 10 seconds.

Q5: How is relay operation indicated to users?
A5: It features a hand-reset mechanical flag and alarm contacts for clear status indication.