Mitsubishi Electric MELPRO-A Series Instruction Manual page 17

4. Operation characteristic control point
Perform the test periodically according to the following test conditions and criteria.
Test item
Operation value
Operating time
R S T
DS
K
ZCT
"MZT"
L
P1 P2
P1, P2 terminal of MGR relay
Black clip
Red clip
Current cord
Red clip
Black clip
Input
－
0A → 130% of setting
0A → 400% of setting
Make sure that this circuit is open before test.
kt
k
ℓ
ℓt
0～1000Ω
500Ω
R1 R0
Fig. 3-8 Test method using combinations of the devices
DS
kt
MGR-A3V
a
Z2 P1 P2
Z1
Fig. 3-9 Test method using relay tester
Test condition
Operation value
Each setting
Minimum setting
※
Z1
Z2
※
A CB
～
Tripping coil
After the test, remove the wires marked by "※".
ZCT
"MZT"
CB
K L
ℓt
Remove the fuses
VT
P1
Remove P2
E
D
Tripping cord
E
c b
E
D
17
Operating time
±10% of setting
Instantaneous
Instantaneous
0.2s
0.3s or more ±20% of setting time
Instantaneous
0.2s
0.3s or more ±10% of setting time
E
MGR-A3V
a
c b
AC100V or DC100V
52a
Note)
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.
Auxiliary power
supply cord
Relay tester
Criteria
value
－
0.1～0.3s
75ms or less
0.1～0.2s
E
D
P1
AC110V
P2
JEP0-IL9555