Mitsubishi Electric MS-T Series - Page 24

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 Combining MSO-T21 (BC), T25 (BC)
The optional UN-TH21 connection conductor is required for assembly.
[Outside view of the
[Applicable magnetic contactor and thermal overload relay] connection conductors]
Combined devices
UN-TH21
Magnetic starter
Magnetic
contactor
Thermal
overload relay
Connection
conductor
MSO-T21 S-T21 TH-T25 UN-TH21
MSO-T25 S-T25 TH-T25 UN-TH21
[Assembly procedures]
1. Fix the connecting conductors (a set of 3 pieces) by the screws on the power supply side terminals
of the thermal overload relay. (Fig. 1)
2. Loosen the three main terminal screws (2/T1, 4/T2, 6/T3) on the magnetic contactor.
3. Tilt the thermal overload relay, and align the thermal overload relay’s notch A (two places) into the
magnetic contactor’s indents (two places). (Fig. 2)
4. Turn the thermal overload relay in the direction of arrow B, and confirm that the thermal overload relay
notch section C (one place) is fit into the square hole at the indent on the magnetic contactor. (Fig. 3)
5. Tighten the main terminal screw while pressing the thermal overload relay toward the magnetic
contactor side.
[Removal procedures]
1. Loosen the three main terminal screws (2/T1, 4/T2, 6/T3) on the magnetic contactor.
2. Tilt the thermal overload relay and lift it up in the direction of arrow D. Release the joint of the
thermal overload relay notch A and magnetic contactor indent.
Connection
conductor
Fig. 1
Fig. 2
Fig. 3
Power supply side terminal screw
Thermal overload relay’s notch A
B
Thermal overload relay’s notch C
Fig. 4
D
Fig. 5
Connection
conductor