Alstom MVAJ105RA0806A (currently belonging to GE Vernova / Grid Solutions | MVAJ 05/10/20 series Trip Relay)
Model Code Disassembly (MVAJ105RA0806A)
MVAJ: Series name (Tripping & Control Relay – Circuit Breaker / Control Relay)
10: Midos Size 2 enclosure, up to 10 sets of contacts
5: Hand + Electrical Reset – Hand reset + Remote electrical reset (with operation indicator flag)
RA: Standard Trip version, with operation indicator flag
0806: 8NO + 6NC contact configuration (total 14 contacts, the maximum 10 contacts on the MVAJ10 platform, this is a customized variant, similar to the common 0804 = 6NO + 4NC in the same family)
A: Suffix for coil rated voltage (110–125 VDC, substation DC operating power supply, and the coil specification is the same as MVAJ105RA0804A)
Core technical parameters Table
Project Specification
Type Hinged Armature High-Speed Trip Relay (Hinged Armature)
Reset Method Manual button reset + Remote reset via electrical coil (Core Feature of MVAJ105)
Action Time < 10 ms (Standard Flag Version)
Configuration Mode Factory default High Burden mode, can be changed to Low Burden mode (Short circuit / Remove jumper on terminals 22-24 to switch)
Contact Short-time Load Carrying 7500VA / 7500W (3s, maximum 30A@300V)
Contact Long-term Continuous 1250VA / 1250W (5A@300V)
DC Open Resistive 80W; Inductive L/R = 0.04s: 40W, maximum 5A/300V DC
Anti-capacitive Discharge High load mode can withstand 10μF capacitor discharge, suitable for long cable trip circuits, anti-misoperation
Shell Midos Size2 (Shared with MVAJ05/10)
Origin Original Factory in the UK (Alstom Grid / GE Grid UK)
Typical Weight ~1.72kg (Reference for the same structure MVAJ105RA0804A)
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