GE Industrial Solutions TLE Series 225-500 Installation Guide - Manual (Page 53)

Critical Power
Modifications reserved Page 53/54
GE_UPS_ISG_TLE_SUL_M22_M50_1US_V010.docx Installation Guide TLE Series 225 - 500 UL S1
5.2.6 X1 terminal block - AUX external Maintenance Bypass
If the UPS system is equipped with an external Maintenance Bypass Switch, it is possible to connect a NO
(Normally Open) voltage-free aux. contact from the External Bypass Switch to the programmable input
X1 / 10, 21, making the UPS operate as if the internal switch Q2 has closed.
This function can be activated by changing a dedicated parameter (password required).
When this NO (Normally Open) contact closes, the output Inverter Contactor K7 it is automatically
opened and the Load transfer back to Inverter will be inhibited.
In a Parallel System, the input on the Customer Interface of each unit must be
connected to a separate AUX contact of the External Maintenance Bypass Switch.
5.2.7 X1 terminal block - eBoost/IEMi control signal
The UPS operation in either eBoost or IEMi operating modes can be controlled via an NO (Normally Open)
contact by installing the “eBoost/IEMi CONTROL” signal, routed to the programmable function contacts
(see Section 5.2.3).
When this contact closes, eBoost or IEMi operation mode is inhibited.
The Parameter for the activation of such function is password protected.
Call the nearest Service Center for its activation.
This function is particularly useful for controlling eBoost or IEMi operation following critical conditions on
either the load side or the input utility, including generator operation when the “GENERATOR ON” signal
has not been installed.
When using the “eBoost/IEMi control” function on the programmable user relays of
the Customer Interface X1 terminals in a Parallel System, a separate NO (Normally
Open) contact must be connected to each individual unit.