ABB OT_C Series Manual Change-over and Transfer Switches
Installation and Operation Guide
Operation
This section details the operational states and switch positions for various OT_C models. The switches are designed for manual change-over and transfer operations.
OT_100-3200_C: Features three positions: OFF (0), ON (I), and ON (II), allowing selection between two power sources or states.
OT160-3200_CL: Similar to OT_100-3200_C, with OFF (0), ON (I), and ON (II) positions.
OT160-800_CF: Offers ON, OFF, and ON positions, facilitating manual switching between circuits.
Mounting
General mounting instructions are provided, including recommended torque values for securing the switches and associated components.
General Mounting Torque: M5 screws require a torque of 3.5-4 Nm (31-35.4 lb.in).
OXP6x161 Screw Torque: 1.8-2 Nm (16-18 lb.in).
OXP12x166 Screw Torque: 1.2 Nm (11 lb.in).
OXP12x185 Screw Torque: 1.2 Nm (11 lb.in).
Mounting positions are indicated, and specific models like OT160-250_C_ and OT315-400_C_ are shown with their respective mounting configurations.
Dimension Drawings
Detailed physical dimensions and mounting hole specifications are provided for various OT_C series models. These drawings illustrate the physical footprint and installation requirements.
OT_160-250_C_ Series
Includes models such as OT160-250E02-04_C_, OT160-250E12-33C_, OT160-250E_WC_, and OT200U_C_.
Key dimensions (A, A1, A2, B) and mounting hole patterns (e.g., OXP 6 x 161, 240-285 mm) are specified for different variants.
Detailed dimension tables for each sub-model are available in the original document.
OT_315-400_C_ Series
Includes models such as OT315-400E02-04C_, OT315-400E12-33C_, and OT400U_C_.
Key dimensions (A, A1, A2, B) and mounting hole patterns (e.g., OXP 12 x 166, 261-325 mm) are specified.
Detailed dimension tables for each sub-model are available in the original document.
OT_630-800_C_ Series
Includes models such as OT630-800E02-04C_, OT630-800E12-33C_, and OT600U_C_.
Key dimensions (A, A1, A2, B) and mounting hole patterns (e.g., OXP 12x185, 324-422 mm) are specified.
Detailed dimension tables for each sub-model are available in the original document.
OT_1000-1600_C_ Series
Includes models such as OT1000-1600E02-04C_, OT1000-1600E12-22C_, and OT800-1200U_C_.
Key dimensions (A, A1, A2, B) and mounting hole patterns (e.g., OXP 12x185, 358-444 mm) are specified.
Detailed dimension tables for each sub-model are available in the original document.
OT_2000-2500_C_ Series
Includes models such as OT2000-2500E02-04C_ and OT2000-2500E12-22C_.
Key dimensions (A, A1, A2, B) and mounting hole patterns (e.g., OXP 12x185, 358-444 mm) are specified.
Detailed dimension tables for each sub-model are available in the original document.
OT_3200_C_ Series
Includes models such as OT3200E02-04C_ and OT3200E12-22C_.
Key dimensions (A, B, C) and mounting hole patterns (e.g., OXP 12x185, 369-455 mm) are specified.
Detailed dimension tables for each sub-model are available in the original document.
Connections
This section covers the electrical connections for the OT_C series switches. It illustrates how to connect power sources and loads to the terminals.
For OT3200_C, connection diagrams show terminal layouts and spacing (e.g., 50 mm).
Accessories
A range of accessories are available to enhance the functionality and installation of the OT_C series switches.
Terminal Clamp Sets (OZX_)
Various terminal clamp sets are offered for IEC and UL standards, supporting different current ratings and wire gauges. Examples include OZXB series for IEC and OZXA series for UL applications.
Specific OZX model compatibility with switch series is detailed in the original document.
Bridging Bars (OTZC_)
Bridging bars are used to connect terminals, facilitating specific switching configurations. Different types (e.g., OTZC13, OTZC14 for OT_100-250_C_) are available for various current ratings (630A, 800A) and switch models.
Reversing Bars (OTZR_)
Reversing bars (e.g., OTZR1, OTZR2, OTZR3) are designed for specific reversing operations in manual change-over configurations.
Auxiliary Contacts (OA_)
Auxiliary contacts (e.g., OA 1G10, OA 3G01) provide additional signaling or control capabilities. They are available for different switch types (OT_C, OT_CF, OT_CL) and can be configured for maximum contact arrangements.
Voltage Sensing Connectors (OMZB_)
Voltage sensing connectors (e.g., OMZB1_, OMZB2_, OMZB3_, OMZB4_) are available for models like OT160-250_C_, OT315-400_C_, OT630-800E_C_, OT600U_C_, OT800U_C_, OT1000-2500OEFF_C_, and OT3200E_C_.
Terminal Shrouds (OTS_)
Terminal shrouds (e.g., OTS250, OTS400, OTS800, OTS1600, OTS2500, OTS4000) are available for various models to provide protection against accidental contact. Mounting torques range from 15-22 Nm to 50-75 Nm depending on the shroud and mounting hardware.
Handles, Direct Mounting (OTV_)
Direct mounting handles (e.g., OTV250ECK, OTV400ECK, OTV800ECK, OTV1000ECK, OTV3200ECK) are available for various OT_C models. Installation requires specific torque (e.g., TX8 0.8 Nm, TX20 1.8 Nm) and may involve locking mechanisms.
Protection against direct contact is recommended when installing handles.
Clearances per UL98
The document specifies clearances required by the UL98 standard for safe installation. This includes minimum enclosure sizes and clearances between components.
UL Standard Switches: Clearances are per UL98 standard.
Minimum Enclosure Size: For OTDC100U_C (100 A), dimensions are 190 mm (Height) x 490 mm (Width) x 315 mm (Depth). For OT200U_C (200 A) up to OT800-1200U_C (800/940 A), specific enclosure dimensions are provided for height, width, and depth.
Detailed enclosure dimensions for various current ratings are listed in the original document.
Phase Barriers (OTB_)
Phase barriers are used to maintain required clearances between phases or conductors, particularly in specific configurations or higher voltage applications.
OTB800/6C: For OT600U_C, OT630-800E_C, used when lugs exceed 39 mm (1.54 in) width.
OTB1600/6C: For OT800-1200U_C, OT1000-1600E_C, OT2000-2500E_C. Required for OT1000-2500E_C if voltage is > 415 V, or if lugs exceed 54 mm (2.13 in) width on OT800U_C/OT1200U_C.
OTB4000/6C: For OT3200E_C.
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