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Specification of high-performance vector convertor
3.2.4 Terimal and wiring of main circuit
1) Description of terminal of main circuit for single-phase frequency convertor
Terminal marking
L1, L2
(+), (-)
(+), PB
U, V, W
PE\
2) Description of terminal of main circuit for single-phase frequency convertor
Terminal marking
R、S、T
(+), (-)
(+), PB
P1, (+)
U, V, W
PE\
Wiring precautions:
a)
Input power L1, L2 or R, S, T:
Wiring on input side of convertor has no requirement on phase sequence. Wiring precautions:
b)
1: (+) (-) terminals of DC bus: there's residual voltage for DC bus (+) (-) immediately after
outage. Contact after CHARGE light extinguishes and confirm it's <36V, otherwise there is risk of
electric shock.
2: When selecting external braking component, avoid inverse connection of (+) (-) polarity,
otherwise it will lead to damage of frequency convertor and even fire.
3: Wiring length of brake unit should not exceed 10m. Twisted pair or tight double-line should
be used for parallel wiring. Do not connect brake resistance directly to DC bus, otherwise it will
lead to damage of frequency convertor and even fire.
c)
Connection terminal (+), PB of brake resistance:
Confirm the model of built-in brake unit, and connection terminal of brake resistance is valid.
Model selection of brake resistance refers to recommended value and wiring distance should be
<5m, otherwise frequency convertor may be damaged.
Name
Input terminal of single-phase power
Positive/negative terminals of DC bus Input point of DC bus
Connection terminal of brake
resistance
Output terminal of convertor
Earthing terminal
Name
Input terminal of three-phase power
Positive/negative terminals of DC bus
Connection terminal of brake resistance
Connection terminal of external DC
reactor
Output terminal of convertor
Earthing terminal
Mechanical and electrical installation
Description
Contact poin of single-phase 220V AC power
Connect brake resistance
Connect three-phase motor
Earthing terminal
Description
Connection point of AC input three-phase
power
Input point of DC bus and brake unit
Connect brake resistance
Connection point of external DC reactor
Connect three-phase motor
Earthing terminal
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