Mitsubishi Electric MELPRO-A Series Instruction Manual page 17

Make sure that this circuit is open before test.
DS
kt
K
k
ZCT
ℓ
"MZT"
ℓt
L
Tripping coil
CB
52a
U V W
From ②
From ①
0~1000Ω
20Ω
R R
1
SW
AC100/110V
Voltage
P1 P2
regulator
P1, P2 terminal of MDG relay
Fig. 2-5 Test method using combinations of the devices
DS K
kt
Black clip
Red clip
Z2 Z1 P1 P2 Y2 Y1 a11 a12 E
Current cord
Red clip
Black clip
Auxiliary power
supply cord
※
※
※
Phase
meter
－
φ
＋
A
～
2
U u
V
0~1000V
～
V v
ZCT
"MZT"
L CB
Remove the fuses
ℓt
VT
(E )
D
P1 P2
Remove P1 and P2
a21
MDG-A3V
a22
(E
D
Tripping cord
V A
Fig. 2-6 Test method using relay tester
MDG-A3V
E
Z1
Z2
a11 a12 Y1
※
MPD-3C
MPD-3W
MPD-3T
N
Y1
T
Y2
E
(E ) (E )
A D
※ ※
To ①
To ②
※ ※
MPD-3C
MPD-3W
MPD-3T
N
Y1
T
Y2
E
)
(E )
D
(E )
A
Black clip
Voltage cord
AC100/110V
φ
17
(E )
D
P1
AC100/110V
P2
Y2
AC100V
or
DC100V
Notes)
These figures show that the V
voltage is applied from the
primary side (high-voltage side)
of MPD-3C capacitor simultaneously
in three-phase.
If the V voltage is applied from
0
the test terminal (T) of MPD-3T,
the voltage value should be one-
tenth of the value from MPD-3C
high-voltage side.
Do not apply voltage into test
terminal (T) more than 380V.
●If there is no test terminal (kt,
ℓt) of ZCT, please pass the red
clip of current cord through ZCT
through hole and connect with the
black clip.
●For MDG-A3V relay, the
of input polarity is that:
Z1 with I input
0
Y2 with V input
0
●Don't forget to remove the wires
marked by "※" in the figures
after the test.
●If the V voltage is applied from
0
the test terminal (T) of MPD-3T,
the wires marked by "※" in the
figures are not required.
●Perform the test in combination
with ZCT (MZT type) and ZVT (MPD-
3 type). Otherwise, direct input
to the relay may cause burning
Red clip
out.
0
○
＋ side
JEP0-IL9554