Basler Electric BE1-11m - Manual (Page 406)

394 9424200996 Rev L
The Steady State Thermal Capacity (TCU) is calculated in Equation 25.
𝑇𝐶𝑈
𝑒𝑛𝑑
= �
𝐼
𝑒𝑞
𝐼
𝑡𝑝𝑢
� × �1 −
ℎ𝑜𝑡 𝑠𝑎𝑓𝑒 𝑠𝑡𝑎𝑙𝑙 𝑡𝑖𝑚𝑒
𝑐𝑜𝑙𝑑 𝑠𝑎𝑓𝑒 𝑠𝑡𝑎𝑙𝑙 𝑡𝑖𝑚𝑒� = �
1.8
2 � × �1 −
1300
1500� = 0.12 × 100 = 12% 𝑇𝐶𝑈
Equation 25. Steady State Thermal Capacity
Where:
I
eq
= Equivalent Thermal Current
I
tpu
= Overload Pickup Current
Step 10: Apply 10 Aac three-phase current for five seconds (simulate motor starting). Step three-phase
current down to 1.8 Aac (simulate motor running). Navigate to Metering > Motor > Motor Meter
on the front-panel display and wait until the Thermal Capacity is 12% per Equation 25.
Step 11: Step the three-phase current up to 10 Aac (simulate motor starting). Verify that OUT2
(Overloaded) closes indicating an overloaded condition. Measure and record the time from
when current is raised to 10 Aac until OUT1 (Tripped) closes and the thermal capacity reaches
100%. The expected timing is 31.87 seconds (88% of 36.22 seconds because %TC starts at
12%). Reference Equation 24. The thermal capacity (12 to 100%) can be monitored at Metering
> Motor > Motor Meter on the front-panel display. Verify that there is a 49TC target on the front-
panel display at Metering > Status > Targets.
Step 12: Remove three-phase current and wait until thermal capacity falls to 0% before proceeding.
Verify that the Stopped LED lights on the front panel. Reset all targets.
Step 13: Use BESTCOMSPlus to open the Thermal Curve (49TC) settings screen. Set the Max
Emergency Thermal Capacity to 200%.
Step 14: Use BESTCOMSPlus to configure the BESTlogicPlus Programmable Logic shown in Figure
268.
Figure 268. BESTlogicPlus Settings, Standard Curve with Emergency Start
Step 15: Press and release the Start button on the BE1-11m to enable an emergency start. An
emergency start expires after one minute if current is not applied. OUT3 (STARTBUTTON)
toggles when the Start button is pressed. Apply 10 Aac three-phase current (simulate motor
Thermal Curve (49TC) Test BE1-11m