Service Manual
R8010RB
MVAX Page 3/24
CONTENTS
1. INSTALLATION 5
1.1 General 5
1.2 Unpacking 5
1.3 Storage 5
1.4 Relay mounting 5
2. COMMISSIONING 6
2.1 General 6
2.2 Wiring 6
2.3 Insulation 6
2.4 MVAX 11 6
2.5 MVAX 12 6
2.6 MVAX 21, 31, 91 7
2.7 Electrical operation tests 7
2.7.1 MVAX 11 only 7
2.7.2 MVAX 12 only 7
2.7.3 MVAX 21 only 8
2.7.4 MVAX 31 (MVAX 91 – 3 separate MVAX 31’s in a size 8 case) 9
2.7.5 MVAX 31 04 only 10
2.7.6 MVAX 31 with CCT breaker closure inhibit contact 11
3. MAINTENANCE 13
4. MECHANICAL SETTINGS 13
4.1 General 13
4.1.1 With the armature closed the clearance between the back of the armature and the
back stop should be 0.075/0.2mm (0.003"/0.008"). 13
4.1.2 Nominal armature gap open. 13
4.2 Contact settings 14
4.2.1 MVAX 11 (Unit RL
1
.) 14
4.2.2 MVAX 12, MVAX 21, 31 (Unit RL
1
.) 14
4.2.3 MVAX 21 (Unit RL
2
), MVAX 31 (Units RL
2
and RL
3
) 14
4.3 Mechanical flag settings 14