(1) Inverter output terminals U, V, and W and terminal G for motor grounding
1) Connect the inverter output terminals U, V, and W to the terminals U, V, and W of the three-phase motor in the correct order of phases.
2) Connect the grounding wire of the output wires (U, V, and W) to the terminal ( G) for grounding.
When multiple combinations of inverters and motors exist, do not use multicore cables for the purpose of handling the wiring together.
Inverter 1
Inverter 2
Inverter 3
Motor 1
Motor 2
Motor 3
Inverter 1
Inverter 2
Inverter 3
Motor 1
Motor 2
Motor 3
(2) Terminal G for inverter grounding
This is the grounding terminal provided with the chassis (case) of the inverter. Do not fail to connect the grounding terminal for safety and as a measure against noise. Technical standards concerning electrical equipment make it mandatory to perform grounding work of metallic frames for electrical appliances to prevent electric shock or fire.
Connect the grounding terminal on the power supply side as described below.
1) According to technical standards concerning electrical equipment, connect the grounding terminal to a grounding pole to which class C grounding work was applied.
2) Connect a thick grounding wire having a large surface area along as short a route as possible.
3) For 132 to 450 kW stacks, follow Figure 4.5.3-1 and Figure 4.5.3-2 on the connections to grounding terminals.
Table 4.5.3-1: Grounding of appliances according to technical standards concerning electrical
equipment
Type of grounding work Grounding resistance Class C grounding work 10 Ω or less
Figure 4.5.3-1: Example of grounding wiring for Frame 3 size (132 to 200 kW)
Figure 4.5.3-2: Example of grounding wiring for Frame 4 size (220 to 450 kW)
Multicore cable
Installation and WiringChapter 4 (3) Inverter DC bus bar connection terminals/converter output terminals P (+), N (-)
The inverter uses DC (direct current) input and the converter uses DC (direct current) output terminals.
Bus bar connections are assumed, but when connecting by electric lines, keep the distance between the stacks to max. 2 m.
When connecting to the DC bus bar by wires, keep the distance to max. 2 m.
Figure 4.5.3-3: Restriction when connecting P (+) and N (-) terminals by electric lines
When using long electric lines, route the P (+) and N (-) lines together and do not route beside control circuits.
(Do not route the P (+) and N (-) electric lines separately.) (4) Control power auxiliary input terminals R0 and T0
The inverter can operate even if the power is not supplied to the control power auxiliary input terminals. However, if the main power to the inverter is turned off, the control power will also be shut down, and output signals of the inverter and the keypad will be no longer displayed.
To retain an alarm output signal to be issued when the protective function operates or keep the keypad displayed even if the main power to the inverter is shut down, connect the power to the control power auxiliary input terminals.
If a magnetic contactor (MC) is used on the input side of the inverter, connect the wire from the input (primary) side of the MC.
Terminal rating: 400V series: 380 to 480 V AC, 50/60 Hz, maximum current 0.5 A 690V series: 575 to 690 V AC, 50/60 Hz, maximum current 0.5 A
DC/DC R0
N(-) DC P(+) F
N(-) L1/R L2/S L3/T
Inverter stack Converter stack
T0
Inverter control power Isolation
transformer MC
MC
Auxiliary b contact of MC AC power
Or
R1 T1
FAN FAN MCCB1 P(+)
MCCB2
Figure 4.5.3-4: Connection of terminals R0 and T0
Terminal name Recommended wire size [mm2]
Control power auxiliary input terminals R0 and T0 2.0
If wires of a larger size than a recommended wire size are used, they may not be inserted into the control cable lead-in hole in the front cover depending on the number of wires.
PN bus bar
Inverter
Within 2 m Within 2 m
Inverter
DCF (DC fuse) Stack-to-stack distance should be 2 m or smaller.
DCF (DC fuse)
When connecting the FRENIC-VG to a PWM converter by connecting the power to the control power auxiliary input terminals (R0 and T0) of the FRENIC-VG, insert an isolation transformer or the auxiliary b contact of a magnetic contactor on the power supply side as shown in Figure 4.5.3-4.
When adding an isolation transformer, select the appropriate isolation transformer based on the sum of the required capacities of the FRENIC-VG and PWM converter, referring to the following tables:
Required transformer capacity for the inverter (FRENIC-VG)
Model 30S 37S 45S 55S 90S 110S 132S 160S 200S 220S 250S 280S 315S 355S 400S 450S 630B 710B 800B
FRNVG1S-4 200 VA — 600 VA
FRNVG1S-69 — 200 VA — 200 VA —
Required transformer capacity for the converter (RHC-D series)
Model 132S 160S 200S 220S 250S 280S 315S 355S 400S 450S 500S 630B 710B 800B
RHC□-4D 200VA － 200VA － 600VA
RHC□-69D 200VA － 200VA －
(5) Fan power auxiliary input terminals R1 and T1
400V stacks with 90 kW or higher capacity and all 690V stacks are equipped with fan power supply terminals, so connect them to AC power supply. Switch the fan power supply switching connectors “U1” and “U2” according to the power supply specifications.
Terminal rating:
• 400V series: 380 to 440 VAC/50 Hz, 380 to 480 V/60 Hz, Maximum current: 1.0 A
(For phase-specific stacks, the maximum current is 3 times larger than above.)
• 690V series: 660 to 690 VAC, 50/60 Hz, maximum current 1.0A 575 to 600 VAC, 50/60 Hz, maximum current 1.0A
Inverter (FRENIC-VG) - Rated capacity of terminals R1 and T1
Model 90 110 132 160 200 220 250 280 315 355 400 450 630 710 800
FRNVG1S-4 100 VA 200 VA — 600 VA
FRNVG1S-69 100 VA — 200 VA —
Converter (RHC-D series) - Rated capacity of terminals R3 and T3
Model 132S 160S 200S 220S 250S 280S 315S 355S 400S 450S 500S 630B 710B 800B
RHC□-4D 100VA 200VA － 200VA － 600VA
RHC□-69D 100VA － 200VA －
Fan power supply switching connectors are located on "Auxiliary power supply printed circuit board" attached to the lower section of the stack.
● 400V series (90 kW or higher)
Auxiliary power supply printed circuit board
Installation and WiringChapter 4
● 690V series (all capacities)
Configuration
Applied voltage
400V series: 398 to 440 V/50 Hz, 430 to 480 V/60 Hz
690V series: 660 to 690 V, 50 Hz/60 Hz (Factory shipping state)
400V series: 380 to 398 V/50 Hz, 380 to 430 V/60 Hz
690V series: 575 to 600 V, 50 Hz/60 Hz
Figure 4.5.3-5: Description of fan power supply switching connector
DC/DC R0
N(-) DC P(+) F
N(-) L1/R L2/S L3/T
Inverter stack Converter stack
T0
Inverter control power Isolation
transformer MC
MC
Auxiliary b contact of MC AC power
Or
R1 T1
FAN FAN MCCB1 P(+)
MCCB2
Figure 4.5.3-6: Connection of terminals R1 and T1
Terminal name Recommended wire size [mm2]
Fan power auxiliary input terminals R1 and T1 2.0
• Terminals R1 and T1 are insulated from terminals R0, T0, P (+), and N (-). Thus, terminals R1 and T1 do not require an isolation transformer, unlike terminals R0 and T0.
When inserting an MCCB2 in terminals R1 and T1 as shown in Figure 4.5.3-6, assign the auxiliary a contact of this MCBB2 to the operation interlock circuit of the inverter. When the MCCB2 is turned off, the cooling fan of the inverter will not run even if the inverter is in operation, and the inverter will cause an overheat trip.
• If wires of a larger size than a recommended wire size are used, they may not be inserted into the control cable lead-in hole in the front cover depending on the number of wires.
Auxiliary power supply printed circuit board
Short circuit harness
Short circuit harness