Starters and Contactors - Access Elevator Supply

Overload Relays – Panel Mount
Overload Relays – Panel Mount
Overload Relays – Panel Mount
This section lists panel mounted overload relays which may
be used to replace starter mounted overload relays that are
no longer available.
While most of these overload relays require incoming and
outgoing wiring, using the Siemens ESP200 is much easier.
Simply pass the wiring straight through the device and
connect it directly to the load side of the contactor.
Technical Note
Sizing Overload Relays for Wye-Delta Applications
At Access Elevator Supply we often see overload relays that are
incorrectly sized or misadjusted. The motor data tag will provide you
with the full load amperage (FLA) of the motor or you can calculate the
FLA from the motor HP and line voltage.
The FLA is your starting point for sizing and setting the overload. Since
electronic overload relays with an adjustable range are most accurate
at mid scale, you should select an overload that meets that criteria if
possible.
Select the Right Setting
For across the line motors, the overload should be initially set at the
motor FLA. From that point, you can gradually dial down to where
nuisance tripping begins, then bump it up from there.
For wye-delta motors, the overload relay should be initially set at the
motor FLA x .58. For example, a 100A FLA would be set at 58A. This is
because this type motor runs at a reduced current inside the delta, where
the overload relay is connected.
Where does the .58 multiplier come from? Well, obviously it is the
inverse of the square root of 3. But then you already knew that. From
your initial setting, dial down as described above until you are above
nuisance tripping.
Remember that overloads are a safety item. An improperly sized or
adjusted overload can have unintentional consequences.
SieMeNS eSP200 elecTRONic 3 PhASe
• Easy installation. Just run motor wires through the overload relay
• No heaters required. Simple adjustment via front mounted dial
• Wide adjustment range. Four overload relay part numbers cover
most applications
• Phase unbalance and phase loss protection. Protects motor from
burning out*
• Selectable reset mode. Manual or automatic
• Selectable trip classes. Class 5, 10, 20 or 30
• Ambient compensated. Unaffected by ambient temperature
• Includes test button and trip indicator. Easy to troubleshoot
• Motor ground fault protection. Protects motor against ground faults
due to moisture, insulation damage*
• Not suitable for use with DC circuits
*Feature can be turned on or off
Siemens Part # Adjustment Range european Part #
48ATC3S00 3 – 12 amps 3UB81234CW2
48ATE3S00 10 – 40 amps 3UB81234EW2
48BTG3S00 25 – 100 amps 3UB81334GW2
48BTH3S00 50 – 200 amps 3UB81334HW2
Overload Relays – Panel Mount Siemens
98 Access ElEvator supply • 800-266-8654 • Fax 510-652-5043 • www.aesupply.com
Access ElEvator supply • 800-266-8654 • Fax 510-652-5043 • www.aesupply.com
99
48ATC3S00
48ATE3S00
48BTG3S00
48BTH3S00
Overload Relays – Panel Mount: Siements