56
8. Daily Inspection and Maintenance
■
ESB-250, ESB-250-2 (Indoor Type)
30.5
1
3
4
5
6
2
1
6
AC
200V
SW
MB
Instant
activation
5
3
4
2
74
84
96
AC 200 V/220 V
CONTACTOR
BRAKE
13.5
13.5
7
Terminal screw M4
13.5
4.5
66
5.5
41
51
Timer and gate circui
t
Arc
-ext
ing
uish
ing
circ
uit
21
20
19
18
17
16
15
14
13
12
11
9 8 7 6 5 4 3 2 1
10
G
■
Accessory Rectifier (DC power supply unit)
Model HD-110M3
Outline drawing
Internal circuit (diagram)
Note : 1. Model HD-110M3 is an indoor model. Take care to avoid water, etc.
2. Transformer is necessary for operation with 400V class power source. Secondary voltage is 200 – 220V.
Items
Specifications
Rated input voltage
AC200/220V 50/60Hz
Maximum input voltage
AC240V 50/60Hz
Minimum input voltage
AC170V 50/60Hz
Standard output
voltage
Instantaneous
voltage
DC180V (for AC200V input)
Steady voltage DC90V (for AC200V input)
Maximum output current
DC1.8A (Steady output)
Over excitation time
0.4 – 1.2 s
Insulation resistance
100MΩ or larger (When measured with 1000V
megohmmeter)
Insulation withstand voltage
AC2000V for one time or more
Maximum frequency
Inching
When on-time 1.2 s or less: 8 cycles/min
Constant
When on-time exceeds 1.2 s: 30 cycles/min
Allowable ambient temperature
-
20
℃ to
60
℃
Code
Part Name
1
Center ring
2
Gap adjusting screw
3
Attachment bolt
4
Field
5
Brake coil
6
Actuating spring
7
Fan
8
Cover
9
Motor shaft
10
Fan set screw
11
Lock bolt
12
Armature
13
Inner disc
14
Outer disc
15
Spacer bush
16
Stopper
17
Hub
18
Brake adapter plate
19
Opposite drive end cover
20
Opposite drive end bearing
21
Opposite drive end bearing
cover
Note : 1. Motor configuration differs for
ventilated types.
2. There are 3 of [13][14] for ESB-250
(
horizontal types) and 2 for
ESB-250-2 (vertical types).
Figure 8-17
Figure 8-18