Section 2 — Installation
RTS “W” Type Transfer Switch
2.1INTRODUCTION TO INSTALLATION
This equipment has been wired and tested at the factory. Installing the switch includes the following procedures:
•Mounting the enclosure.
•Connecting utility and generator power source leads.
•Connecting the load leads.
•Connecting any auxiliary contact (if needed)
•Installing/connecting any options and accessories.
•Testing functions.
2.4.1 2-POLE MECHANISM
These switches (Figure 2.1) are used with a single phase system, when the single phase NEUTRAL line is to be connected to a Neutral Lug and is not to be switched.
Figure 2.1 — Typical 2-Pole Transfer Mechanism
(400 Amp Shown)
2.2UNPACKING
Carefully unpack the transfer switch. Inspect closely for any damage that might have occurred during ship- ment. The purchaser must file with the carrier any claims for loss or damage incurred while in transit.
Check that all packing material is completely removed from the switch prior to installation.
2.3MOUNTING
Mounting dimensions for the transfer switch enclo- sure are in this manual. Enclosures are typically wall- mounted. See the “Mounting Dimensions” drawing.
Handle transfer switches carefully when install- ing. Do not drop the switch. Protect the switch against impact at all times, and against construc- tion grit and metal chips. Never install a transfer switch that has been damaged.
Install the transfer switch as close as possible to the electrical loads that are to be connected to it. Mount the switch vertically to a rigid supporting structure. To prevent switch distortion, level all mounting points. If necessary, use washers behind mounting holes to level the unit.
2.4CONNECTING POWER SOURCE AND LOAD LINES
DANGER
Make sure to turn OFF both the UTILITY (Normal) and EMERGENCY (Standby generator) power supplies before trying to connect power source and load lines to the transfer switch. Supply voltages are extremely high and danger- ous. Contact with such high voltage power sup- ply lines causes extremely hazardous, possibly lethal, electrical shock.
Wiring diagrams and electrical schematics are pro- vided in this manual. Power source and load connec- tions are made at the transfer mechanism, inside the switch enclosure.
Solderless,
The conductor size range is as follows:
| Switch Rating | Wire Range |
|
| 400A | (1) |
|
|
| (2) |
|
|
|
|
|
Conductor sizes must be adequate to handle the max- imum current to which they will be subjected; based on the 75°C column of tables, charts, etc. used to size conductors. The installation must comply fully with all applicable codes, standards and regulations.
Before connecting wiring cables to terminals, remove any surface oxides from the cable ends with a wire brush. All power cables should enter the switch next to transfer mechanism terminals. If ALUMINUM con- ductors are used, apply corrosion inhibitor to con- ductors. Tighten terminal lugs to the torque values as noted on the decal located on the inside of the door. After tightening terminal lugs, carefully wipe away any excess corrosion inhibitor.
All power cables should enter the switch next to the transfer mechanism terminals.
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