ABB OTM C Series User manual
Motorized change-over and transfer
switches OTM_C
Installation and operating instructions
34OTM_C / 1SCC303002M0204
3
1SCC303002M0204, rev. D
Installation and operating instructions, OTM_C
Contents
Contents
1. Introduction ....................................................................................................................... 4
1.1 Use of symbols .............................................................................................................................4
1.2 Explanations of abbreviations and terms .....................................................................................4
2. Product overview .............................................................................................................. 5
3. Quick start ......................................................................................................................... 6
3.1 Operating the motorized change-over switch electrically; remote control...................................6
3.1.1 Locking electrical operation..........................................................................................................6
3.2 Operating the motorized change-over switch manually; local operation .....................................7
4. Installation ......................................................................................................................... 8
4.1 Mounting the motorized change-over switch............................................................................... 8
4.2 Dimensional drawings.................................................................................................................10
4.3 Mounting positions .....................................................................................................................17
4.4 Labelling .....................................................................................................................................17
5. Connecting ...................................................................................................................... 18
5.1 Control circuit .............................................................................................................................18
6. Operating......................................................................................................................... 19
6.1 Electrical operation .....................................................................................................................19
6.1.1 Impulse control ...........................................................................................................................20
6.1.2 Continuous control .....................................................................................................................21
6.2 Manual operation by using the handle .......................................................................................22
6.3 Locking .......................................................................................................................................23
6.3.1 Locking the electrical operation .................................................................................................23
6.3.2 Locking the manual operation ....................................................................................................23
7. Technical data ................................................................................................................. 25
8. Accessories..................................................................................................................... 27
8.1 Terminal clamp sets.................................................................................................................... 27
8.2 Bridging bars ..............................................................................................................................28
8.3 Terminal shrouds.........................................................................................................................31
8.4 Auxiliary contacts .......................................................................................................................34
8.5 Voltage sensing connectors........................................................................................................ 35
8.6 Handle and spare fuse storage...................................................................................................36
9. UL standard switches..................................................................................................... 37
9.1 Phase barriers.............................................................................................................................38
1SCC303002M0204, rev. D
4
Installation and operating instructions, OTM_C 1. Introduction
1. Introduction
This manual describes the installation and the basic operation of the motorized change-over and transfer
switches, types OTM_C. The instructive part is followed by a section on available accessories.
1.1 Use of symbols
Hazardous voltage: warns about a situation where a hazardous voltage may cause
physical injury to a person or damage to equipment.
General warning: warns about a situation where something other than electrical
equipment may cause physical injury to a person or damage to equipment.
Caution: provides important information or warns about a situation that may
have a detrimental effect on equipment.
Information: provides important information about the equipment.
1.2 Explanations of abbreviations and terms
OTM_C: Motorized change-over switch, the type name
OME_: Motor operator, the type name
OT_C: Change-over switch, the type name
OZXB_ and OZXA_: Terminal clamp sets, the type name, accessories
OTZC_: Bridging bars, the type name, accessories
OTS_: Terminal shrouds, the type name, accessories
OA_: Auxiliary contacts, the type name, accessories
5
1SCC303002M0204, rev. D
Installation and operating instructions, OTM_C
2. Product overview
2. Product overview
Motorized change-over switches (type OTM_C) are suitable for remote control. You can operate the
motorized change-over switches either electrically by using the motor operator or manually by using the
handle. The operation, either electrical or manual, can be chosen by the selector switch “Motor/Manual”
on the motor operator. Motorized change-over switches consist of the change-over switch and the motor
operator.
Figure 2.1 Motorized change-over switch (type OTM_C)
1Change-over switch
2Motor operator
3Switch panel, the operating mechanism
4Handle for manual operation, double grip handle in sizes OTM1000-2500_C
5Motor/Manual selection
6Terminals for motor operator voltage supply
7Terminals for push-buttons
8Fuse (F1) of motor operator
9Locking latch for releasing the handle and locking electrical operation
10 Locking clip for locking manual operation
11 Terminals for locking state information
12 Place for auxiliary contacts
1SCC303002M0204, rev. D
6
Installation and operating instructions, OTM_C 3. Quick start
3. Quick start
This is a quick guide only meant for those who need a reminder of how to operate the unit. For more
detailed instructions, see chapter 6.
3.1 Operating the motorized change-over switch electrically;
remote control
To operate the motorized change-over switch electrically:
1. Remove the handle from the switch panel. You can remove the handle in all
positions (I, 0, II).
2. Turn the Motor/Manual selector to the Motor (M) position to enable electrical operation.
Figure 3.1 Operating the motorized change-over switch electrically; remote control
3.1.1 Locking electrical operation
To disable electrical operation, lock the locking latch with a padlock. After the locking latch has been
locked, the motorized change-over switch cannot be operated electrically. You can lock electrical
operation in all positions (I, 0, II).
Figure 3.2 Locking electrical operation
7
1SCC303002M0204, rev. D
Installation and operating instructions, OTM_C3. Quick start
3.2 Operating the motorized change-over switch manually;
local operation
To operate the motorized change-over switch manually:
1. Turn the Motor/Manual selector to the Manual (Man.) position to enable manual operation and to
prevent electrical operation.
2. Attach the handle to the switch panel. You can attach the handle in all positions
(I, 0, II).
Figure 3.3 Operating the motorized change-over switch manually
To disable the manual (and at the same time also electrical) operation, lift up the locking clip to position 0
and attach the padlock to the handle.
Figure 3.4 Locking the manual operation
1SCC303002M0204, rev. D
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Installation and operating instructions, OTM_C
4. Installation
4.1 Mounting the motorized change-over switch
Figure 4.1 An example of using protection against direct contact
Use protection against direct contact.
4. Installation
9
1SCC303002M0204, rev. D
Installation and operating instructions, OTM_C
Figure 4.2 Motorized change-over switches, drilling hole distances / screw-mounting, [mm/in]
4. Installation
Installation and operating instructions, OTM160-2500_C
1SCC303002M0204, rev. D
10
4.2 Dimensional drawings
Figure 4.3 OTM160-250E_C_M
Figure 4.4 OTM160-250E_WC_M
4. Installation
mm
mm
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