How To Switch Voltage, Sensitivity Current And Operating Time Of Earth-Leakage Relay - Mitsubishi Electric C Series Handling And Maintenance

2.3.8 How to switch voltage, sensitivity current and operating time of earth-leakage relay

ZBA
Sensitivity current
selector
120V
240V
4 5
7 8
a b
• When source voltage is 120V in the above
drawing,connect to 4 and 5 terminals.
• When source voltage is 240V in the above
drawing,connect to 4 and 6 terminals.
• As lotted head screwdriver of 4.5mm width
at the top and 0.6mm thickness is suitable
for setting.
• Stopping between two set values makes
sensitivity current or operating time un-
stable in some cases.
Be sure to set at the position of each set
value.
• Refrain from applying unnecessary force
at the time of setting.
It can cause failure.
(Adequate operation torque is 0.05N·m
max.)
ZCT
1
1 3
240V
Operating time
selector
(time-delay type)
a2
6
6
9
c
• When source voltage is 240V in the above
drawing,connect to 1 and 2 terminals.
• When source voltage is 415V in the above
drawing,connect to 1 and 3 terminals.
• As lotted head screwdriver of 4.5mm width
at the top and 0.6mm thickness is suitable
for setting.
• Stopping between two set values makes
sensitivity current or operating time un-
stable in some cases.
Be sure to set at the position of each set
value.
• Refrain from applying unnecessary force
at the time of setting.
It can cause failure.
(Adequate operation torque is 0.05N·m
max.)
Earth leakage relay
ZSA, ZHA, ZLA
2 3 4 5
a1 c1
415V
Sensitivity current
selector
Operating time
selector
(time-delay type)
b2 c2
7 8 9 10
ZCT
ZU
ZCT
1 2 3
COM OUT IN
0.2A
Change-over
switch
0.5A
1A
415V
240V
a1
6 7 8
• When source voltage is 240V in the above
drawing,connect to 6 and 7 terminals.
• When source voltage is 415V in the above
drawing,connect to 6 and 8 terminals.
• Turn the change-over switch with a screw-
driver to set the arrow at a desired scale
position.
ZCT
4 5
ZCT
c1
9 10
16