Terminal Layout - Mitsubishi Electric MELPRO A Series Instruction Manual

Terminal layout

○ P1 P2
9.5 9.5 9.5
Do not connect to the "×" terminals, or the relay may not operate properly.
Drawing out and housing operation of subunit (Unit-drawer type)
For unit-drawer type (RD type), it is possible to draw
out the subunit from the case without removing external
wiring, which makes easier to carry out inspection and
testing.
When drawing out and housing, be careful not to touch the
electrical circuit (e.g.
transformer) and be sure to hold the drawer handle or the
frame part when transporting. (Touching the electrical
circuit may cause electric shock or damage to the
circuit.)
Before the subunit is to be drawn out, ensure that the
Subunit
Cover (Transparent)
Drawer fixing
screw
× × b1 c1 a1 b2 c2
9.5 9.5 9.5 9.5 9.5 9.5 9.5
MUV-A3V-R
The "○" terminal is junction terminal for grounding wire
if there was grounding wire in the existing relay.
Fig. 4-4 Terminal layout
substrate, capacitor,
Fig. 4-5 Structures of unit-drawer type (RD type)
×
a2
○
following items are checked in order not to carry out the
work in hot-line condition.
・ Lock of the tripping circuit
・ Turning off the main circuit
・ Disconnect CT/VT circuit
and ・ Turning off the auxiliary power supply
The CT circuit is equipped with an automatic short circuit
piece so that the CT secondary circuit won't be opened
even if
disconnecting the CT circuit.
12
P1 × × b1 c1
P2 × × b2 c2
9 9 9 9 9 9
MUV-A3V-RD
the relay subunit is
Connector of case
Connector of subunit
(Back side)
Drawer handle
(Back side)
a1
14
a2
drawn out without
JEP0-IL9556