Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092
E87010-A0519-T003-A7-3RE4
Instructions
Installation
Operation
Maintenance
Replacement
March, 2019
A5E46948882A-002
3RE4
Non-Combination Motor
Controllers
For replacement parts information or an application guide,
visit our website at www.usa.siemens.com/controls,
or contact your local Siemens sales office.
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IMPORTANT
These instructions do not purport to cover all details or variations in equipment, nor to
provide for every possible contingency to be met in connection with installation,
operation or maintenance, should further information be desired, or should particular
problems arise which are not covered sufficiently for the purchaser’s purposes, the
matter should be referred to the local Siemens sales office. The content of this
instruction manual shall not become part of or modify any prior or existing agreement,
commitment or relationship. The sales contract contains the entire obligation of
Siemens. The warranty contained in the contract between the parties is the sole
warranty of Siemens. Any statements contained herein do not create new warranties
or modify the existing warranty.
Hazardous Voltage.
Will cause death or serious injury.
Turn off and lock out all power supplying
this device before working on this device.
Replace all covers before power
supplying this device is turned on.
DANGER
Description
3RE4 non-combination motor controllers include a
horsepower rated contactor and an overload relay
(OLR) with a reset operator (for motor starters).
They may also include optional factory installed
accessories such as pilot devices and a control
power transformer.
The NEMA Type 1 enclosures have a lift-off cover.
They are suited for general purpose indoor applica-
tions only.
The NEMA Type 3/3R/4/12 enclosures have a
removable hinged door. They are water and dust
tight and are suited for outdoor as well as indoor
applications.
The NEMA Type 4X 304 stainless steel enclosures
are noncorrosive and have a removable hinged
door. They are water and dust tight and are suited
for outdoor as well as indoor applications.
Pre-Installation
1. Examine the enclosure and each component for
shipping damage. Notify carrier for a claim if any
damage is found. DO NOT attempt to install or
apply power to any damaged product.
2. Verify that the horsepower, voltage and current
rating of the motor do not exceed the controller
rating.
3. If the control circuit is to be powered by an
external source, verify that the supply voltage
matches the voltage rating of the contactor coil.
4. If a control power transformer is supplied with
the controller, verify that the supply voltage
matches the primary voltage of the control
power transformer.
5. For controllers other than size S2 starters, skip
this step and proceed to the next one. Size S2
starters are shipped with the OLR uncoupled
from the contactor. This is to help prevent
damage should the product be mishandled
during shipment. The OLR must be coupled to
the contactor by following these steps:
a. Couple the OLR to the contactor as
shown in Figure 1.
b. A jumper wire should already be
connected to terminal A2 on the contactor.
Route the loose end of the wire between
the contactor and OLR as shown in
Figure 2.
c. Connect the loose end of the wire to
terminal 95 on the OLR.
1
