![SCOV SV800 Series Скачать руководство пользователя страница 44](http://html.mh-extra.com/html/scov/sv800-series/sv800-series_user-manual_1219567044.webp)
4 Electrical wiring and precautions SV800/SV800A User Manual
36
Table 4-1 Main circuit terminal function definition table
Terminal
symbol
Terminal name
Terminal function definition
-
DC power terminals
DC power output, - is negative DC bus terminal, +1 or
+ is positive DC bus terminal, they can be used for
external braking unit or common DC bus.
+1 or +
+1
Brake resistor terminal
For installing external braking resistors and realize
fast stopping.
PB
+2
DC reactor terminals
Terminal +2 and +1 have been shorted by shorting
link before leaving factory. Please remove the shorting
link when need to install DC reactor. It can not be
removed when installing braking resistor or common
bus using. The inverter has built-in DC reactor as
standard for power ≥90kW.
+1
R
Inverter POWER input
terminals
Connect three phase AC power supply
S
T
U
Inverter output terminals for
MOTOR
Connect three phase AC motor
V
W
Grounding
Grounding terminal, the grounding resistance should
<10 ohms.
4.1.2 Main circuit wiring precautions
1) Input power L1, L2, L3 or R, S, T:
The wiring on the input side of the frequency inverter has no phase sequence
requirements.
The specifications and installation methods of external power wiring must comply with
local regulations and related IEC standards.
2) DC bus ter1 and -:
Please note that ter1 and – of DC bus have residual voltage after the inverter is
switched off. Wait at least 10 minutes after the CHARGE indicator goes off before operating
wiring, otherwise you may have a risk of electric shock.
When using external brake component for inverter with power above 22kW, please pay
attention to the polarity of te1 and – that it can not be reversed, otherwise the frequency
inverter will be damaged or even cause a fire.
The wiring length of the brake unit should not exceed 10m. Twisted pair wire or tight
two-wire parallel wiring should be used.
Do not connect the braking resistor directly to the DC bus terminals. Otherwise it may
cause the inverter damage or even a fire.
3) Braking resistor connection ter1, PB: