Mitsubishi Electric MS-T Series, Инструкция по эксплуатации

Страница: 10 / 32

8
 Minimum mounting clearance

Always observe the specified minimum mounting clearance and arc space. Hot
ionized gas will be discharged when the current switches.
Refer to Table 1.
When mounting the Magnetic Contactors side by side, be sure to keep the devices isolated by a distance
longer than the dimension shown in the following table. Also, the Magnetic Contactors and adjacent
grounding metal should be isolated by a distance longer than the dimension shown in the following table.
The content described in ( ) is applied when additionally mounting auxiliary contacts.
Although an arc space is not required in a position above the Magnetic Contactors, it is recommended to
provide a space longer than the E dimension shown in the following table in consideration of the product
movement caused by variation in depth dimension of Magnetic Contactors and the vibration produced
when turning on or releasing the contactor.
Table 1 Minimum mounting separation
Minimum mounting space
Frame
A(A
1
, A
2
)
dimension
[mm]
B(B
1
, B
2
)
dimension
[mm]
C (C
1
)
dimension
[mm]
D
dimension
[mm]
Arc
Space
(Note 1)
Upper
mounting
space
E
T10
41
(A
1
= 53, A
2
= 65)
T12
T20 48
(A
1
= 60, A
2
= 72)
T21
T25 68
(A
1
= 80, A
2
= 92)
T32
48
(A
1
= 60, A
2
= 72)
SR-T5
48
(A
1
= 60, A
2
= 72)
5 (Note 2)
(B
1
= 17,
B
2
= 29)
10
(C
1
= 22)
5
(Note 3)
A
1
, B
1
, C
1
: When an auxiliary contact is added to
the shadowed area
A
2
, B
2
: When two auxiliary contacts are added
to the shadowed area
Mounting space and arc space
SR-T9 48 5 (Note 2) 10
15 0
3
Note 1. The value of this arc space is a value of IEC and JIS Standards-based closed circuit shut-off
capacity test.
Note 2. Although the B dimension of T10 to T32 allows closely-attached mounting, when continuing to
apply current to the device or when mounting a product high in open/close frequency and high
utilization on the same rail, the device life may be shortened in terms of temperature increase
and impact, so please keep the space between the devices over the minimum value shown in the
above table as much as possible when mounting them.
Note 3. E dimension is 3mm when mounting UT-AX2 or UT-AX4 with magnetic contactors.
3.2 Connection

If the terminal screws become loose, overheating or fires may occur. Always tighten
with the specified tightening torque and tighten the screws periodically.
An excessive tightening torque could damage the terminal screw.

A sufficient insulation distance must be secured for the crimp terminal and connection
conductor connected to the terminal, if not, short circuits could occur.

If the wire size is insufficient, overheating or fires could occur. Use wire appropriate
for the working conditions.

If lock paint or a thermo-label, etc., adheres to the wire connection section or contact,
overheating or fires could occur due to continuity failures.

If the terminal screws have been loosened, securely tighten them with the specified
tightening torque. Failure to observe this could lead to overheating or fires.
(1) Coil voltage and frequency
The voltage and frequency of the control circuit must match with the rated indicated voltage and
frequency of the coil.
(2) Connection to terminal screw with self-lifting plate
The provided terminal screw with self-lifting plate can be used even when a crimp terminal is used. For
the terminal screw with self-lifting plate, wires can be connected with their insulation sheath peeled off.
CAUTION
CAUTION
(One wire) (Two wires)