Mitsubishi Electric C Series Handling And Maintenance page 13

[for Group A]
Step setting type:
LTD time T
STD pick up current I
STD time T
Pre-alarm pick up current I
Continuously adjustable type:
Current setting Ir
Instantaneous pick up current I
Setting
[for Group B]
method
Rated
current
225
TEST
Step setting type:
Rated current In
Long time-delay operating time T
Short time-delay tripping current I
Short time-delay operating time T
Pre-alarm current I
11
MODEL
RE250 250
In
50/60Hz(AC only)
TEST
×
Ir T Is
(A) L(s) ( Ir)
175 200 4 5
80 6
60 3.5
.1
225 7
150 3
8
2.5
125 250 12 100 2 10 .06
LTD time T STD time T
L
Note 1)
Current STD pick up
setting Ir current I
S
,
L
,
S
,
S
P
i
70%
Ip
.8
.75
.7
For setting, turn
the arrow of each
dial to the scale
position desired
Current Short time-delay
tripping current
setting
4 5 6
250 300 .7 .8
3 7
350
6
8
1
.5 2 10 4
200
In(A)
I (×400A) I (×In, Ir)
r S
.2
100
60 .1
150
12
.3 .7
.06
T (s) T (s)
L S
Long time-delay Short time-delay
operating time operating time
L
S
S
P
Fastening torque
0.3~0.6N·m
T Ir
Ip
TL
Is
A
70% PAL OVER
Ii
Ts
×
Ip
Ts ( Ir)
(s)
I
×
I
i 8 .85
.2 ( 250A)
.9
10
.8
6 .95
12 .75
.3 4 14 .7 1.0
Pre-alarm pick up
S
current I
P
Instantaneous pick up
current I
i
For setting, turn
the arrow of each
dial to the position
desired
PAL OVER
×
I p
( Ir) N
IT
.85
.9
4P3E 4P4E
.95
Neutral protection I
1.0
8 10
Instantaneous
12
tripping current
14
16
I (×400A)
I
.8 .9 Pre-alarm
current
1.0
I (×In, Ir)
P
Continuously adjustable type:
Current setting Ir (Note 1)
Instantaneous trip current I
(1) Open the button cover using a
screwdriver as illustrated at left.
(2) Set operating characteristics by
turning the dials.
For turning the dials for chracteristic
setting,use a screwdriver as illus-
trated at left.a
1 A slotted head screwdriver of
3mm width and 0.5mm thick-
ness at the top is suitable for the
setting.
2 At setting,refrain from applying
force more than necessary as
such can cause broken.
(Adequate operation torque is
0.02N·m maximum.)
* As for Is and Ip setting,a set
value may advance to the next
one in some cases
3 Except for the dials of current
setting Ir and instantaneous
pick up current Ir keep the ar-
row of the setting dials within the
range of the thick line of setting
value.
4 On 4P circuit breakers, neutral
protection is selected using a 2-
position setting:
4P 3E (neutral unprotected),
4P 4E (neutral protection at Ir),
where Ir is the circuit breaker
current setting.
(3) Close the button cover.
Np
(1) Open the transparent cover.
(2) Set tripping characteristics by turn-
ing the dials.
For turning the dials for character-
istic setting, use a screwdriver as
illustrated at left.
1 A slotted head screwdriver of
4.5mm width and 0.6 mm thick-
ness at the top is suitable for the
setting.
2 At setting, refrain from applying
force more than necessary as
such can cause failures.
(Adequate operation torque is
0.05N·m maximum.)
3 Except for the dials of current
setting lr and instantaneous trip-
ping current l
of the setting dials within the
range of the thick line of setting
value.
Stopping the arrow in the middle
I
may advance the set value to
the next one in some cases.
* As for Is setting, a set value
may advance to the next one
in some cases.
(3) Take the seal of the same value for
setting value out of the replacement
labels, and stick the label to the top
of the handle.
(4) Close the transparent cover.
, keep the arrow
l