enphase IQ8 Series User Manual

DATE :
01/04/2023
SHEET:
1 of 1
SCALE:
NTS@A4
DRAWING No: EN-IQ8-3PHN
DRAWING Name: Electrical diagram example: Multi-phase IQ8 Series Microinverter grid tied PV system
Gateway internet connection: - Ethernet LAN cable - Wi-Fi - Mobile Connect Cellular Modem Gateway internet connection: - Ethernet LAN cable - Wi-Fi - Mobile Connect Cellular Modem
Q1 1PH+N Q1 1PH+N
Q2 1PH+N Q2 1PH+N
Qn 1PH+N Qn 1PH+N
Consumption measurement CTs installed on Line Conductors
Production measurement
CT installed on Line
Conductors
AC cable 5 Core
(L1, L2, L3, N, PE)
6 mm² Minimum recommended
conductor size, see note 4
AC cable 5 Core
(L1, L2, L3, N, PE)
6 mm² Minimum recommended
conductor size, see note 4
AC cable 4x 2.5mm² (L1, L2, L3, N)AC cable 4x 2.5mm² (L1, L2, L3, N)
IQ Relay
3PH
IQ Relay
3PH
MCB 3PH+N 25 A MCB 3PH+N 25 A
MCB 3PH+N 6 A MCB 3PH+N 6 A
Utility meter See note 9 Utility meter See note 9
kWhkWh
Main breaker 3PH+N Main breaker 3PH+N
PV Sub-panelPV Sub-panel
Main PanelMain Panel
LoadsLoads
RCD - Consumption 3PH+N See note 8 RCD - Consumption 3PH+N See note 8 MCB - Consumption 3PH+N
Multi-phase IQ Cable 4x 2.5 mm²
(L1, L2, L3, N)
MCB - Production
3PH+N
40 A
MCB - Production
3PH+N
40 A
RCD - Production
3PH+N
40 A, 30 mA
See note 8
RCD - Production
3PH+N
40 A, 30 mA
See note 8
~~ ~~ ~~~~~~ ~~~~
~~
JB
L1-N L2-N L3-N
L1-N L2-N L3-N
L3-N L1-N
Maximum microinverters per 25 A circuit: 42x IQ8MC (Considering 1.20 safety factor)
Recommended maximum 18
microinverters per IQ Cable section (To
reduce Vrise in cable to <1%)
Recommended maximum 18
microinverters per IQ Cable section (To
reduce Vrise in cable to <1%)
NOTES: 1.These schematics are examples only. These schematics provide recommendations to assist the system designer and installer. 2.The design and installation of the photovoltaic power plant must be carried out in accordance with local electrical standards in the country of installation and must be carried out by competent personnel. 3.Before installing any PV equipment, check the phase-to- neutral voltage at the point of connection. The operating voltage must be within a range acceptable for the 230 V microinverters. 4.When planning the system, you must select the appropriate AC conductor size to minimize voltage rise. Select the correct conductor size based on the distance from the junction with the microinverter AC branch circuit to the circuit breaker in the electrical panel. Enphase recommends a voltage rise total of less than 2% from the start of IQ Cable to the point of supply. 5.The 2.5 mm² IQ Cable is usually protected by a 25 A B curve circuit breaker. 6. The equipotential bonding between PV module frames, array mounting structure and the metal microinverter mounting brackets must be installed in accordance with local electrical standards. 7. Optional : PV systems without Lightening Protection LPS are recommended to have Surge Protection devices SPD Type/ Class II installed, if LPS is installed Type/Class I is recommended. SPD's are recommended on all PV circuits greater than 10m in cable length. Refer Techbrief here 8. Enphase microinverters have an integrated High Frequency transformer which provides galvanic separation between DC and AC parts. Where local electrical standards require RCD protection, a Type A device can be used. Refer Techbrief here. 9. Utility meter may be located inside the main panel or as a standalone device.
Array structure earthing where required See note 6
Public electricity network
(Grid connection)
IQ Gateway
Metered
Communication
Gateway
SPD
3PH+N
See note 7
SPD 3PH+N Note 7

enphase IQ8 Series Specifications

General

Brand	enphase
Model	IQ8 Series
Category	Inverter
Language	English