ComAp MainsPro - Connection with Voltage Transformers; Power Supply

MainsPro, SW version 1.4, ©ComAp – January 2013
MainsPro Installation and Operation Guide
1-8
Connection with voltage transformers
MainsPro allows connecting HV or other measurement transformers with secondary rated voltage
100V. Provide the "Star" or "Delta" arrangement on the primary windings of the transformers and
connect the secondary 100 V to the MainsPro measurement inputs. Setpoint Basic: Uin is to be set to
120V. This setting provides the guaranteed measurement accuracy for the 100V inputs with over-
range to 120V * 130% = 156 VAC.
Note:
It is recommended to use “Delta” arrangement on the HV side to avoid nuisance tripping caused by
phase voltage unbalance.
Single-phase connection
MainsPro provides support for single-phase applications. Use the U
A
terminals to connect the
measured voltage to the unit and set the setpoint Basic: System to 1ph. Use the same setting of rated
voltage selection as mentioned above.
L1
N
Power supply
MainsPro provides set of 3 terminals for the purpose of dual power supply range:
8 - 40 VDC: use the terminals + and N/-
85 - 265 VAC / 110-370 VDC: use the terminals L/+and N/-
230 VAC
L N
24 VDC
+ -
Battery