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10H92873 - rev. 8 - 01/2019 - pag. 11
6.4. APPENDIX B - 80-NET / 70-NET (50-60KVA)
6.4.1. PARAMETERS SETTING
6.4.1.1. ENABLE EXTERNAL SYNCHONISATION CONTROL
Once all the connections are done as per Installation Manual, switch on QS1 on the first UPS and perform the
following steps:
In PPVis -> Parameter Input -> "[10] [CU-Inverter] Inverter Init", set the following parameters:
• PNU 51.0 "Access level CU" set to "Experts - Level 3 (3)";
• PNU 799.0 "SF - Super service" set to "SF 4 (4)";
• PNU 52.0 "Function selection CU" set to "H/W Init - URL (2)";
• PNU 579.0 "Enable External synchronization" set to "Yes (1)";
• PNU 67.1 "VEC_EXT_PHI_OFFSET" set to "0";
• PNU 67.2 "VEC_EXT_SYN_F_LIM" set to "1024";
• PNU 67.3 "VEC_EXT_SYN_PHI_LIM" set to "1024";
• PNU 67.4 "VEC_DELTA_F_GAIN" set to "4096";
Send all the parameters according to the list above (use the send pushbutton);
Once the parameters are at the "Actual Value" return to normal operation as follows:
• PNU 52.0 "Function selection CU" set to "Return (0)";
• PNU 799.0 "SF - Super service" set to "SF 0 (0)";
• PNU 51.0 "Access level CU" set to "Normal Operation - Level (1)";
• Once back in normal operation open QS1 and the electronics will shut down;
Follow these steps for ALL the units connected to ESB.
6.4.2. OFFSET COMPENSATION TUNING
The parameter 67.1 has been designed to compensate the phase error, introduced by the UPS control, between
the frequency reference coming from the ESB and the inverter output signal.
To carry out this procedure an oscilloscope between reserve input and inverter output must be used. The ESB
must be already installed and interconnected to the UPS system. The PNU 579 must be already loaded and
set to 1.
The PNU 67.1 calibration must be done on each UPS composing the system.
Please, perform the following steps:
• Connect your oscilloscope to the first UPS;
(Connect "Channel 1" to "Bypass Input L1 & N" and "Channel 2" to "UPS Output L1 & N", as shown in the following
figure)
Fig. 10 -
• With NO LOAD connected, start the inverter;
• Open the reserve input switch QS2;
• Verify on the oscilloscope the phase error between inverter and bypass.
ESB
Main BUS A
Reserve input
oscilloscope
UPS An
F
ref
CH1
CH2
(L1-N)
Содержание 10H92873
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