RDT Transfer Switch Manual

TP-6345 9/138 Introduction
Model Code
Record the transfer switch model designation in the boxes below. The transfer switch model designation defines
characteristics and ratings as explained in the accompanying chart.
Kohlerr Model Designation Key
This chart explains the Kohlerr transfer switch model designation system. The sample
model designation shown is for a Model R service entrance rated automatic transfer
switch that uses a standard-transition contactor with MPACr 500 electrical controls
rated at 240 volts/60 Hz, 2 poles, 3 wires, and solid neutral in a NEMA 3R enclosure
with a current rating of 200 amperes and no load center.
Model
R: Model R automatic transfer switch
Electrical Controls
C: MPACt 500 (Microprocessor ATS Control)
Number of Poles/Wires
0100: 100 amps 0200: 200 amps 0400: 400 amps
RDT-CFNC-0200ASE
SAMPLE MODEL DESIGNATION
Mechanism
D: Specific-breaker rated
Transition
T: Standard transition
Load Center
A: Without load center
B: With load center (not available on 400 amp models)
D: 220 Volts/50 Hz
F: 240 Volts/60 Hz
Voltage/Frequency
N: 2-pole, 3-wire, solid neutral
Model Controls
V
oltage Poles Enclosure Current Rating Load CenterMechanismTransition
Current Rating: Numbers indicate the current rating of the switch in amperes:
* NEMA 1 only: 100 and 200 amp models without load centers can be recess-mounted between wall studs. Optional wall-mount bezel is
available.
Service Entrance:
SE: Service entrance model (200 and 400 amp models available)
Blank: Not rated for service entrance
Service Entrance
Enclosure
A: NEMA 1 (steel) *
C: NEMA 3R (aluminum)