Chapter 3 Electrical Installation
JT550 Series Inverter Manual
- 20 -
3.3 Peripheral Electrical Components Selection Guidance
Converter model
MCCB
(A)
Contactor
(A)
Power Input
Cable
(mm
2
)
Power Output
Cable
(mm
2
)
Control Circuit
Wirings (mm
2
)
JT550-S2-0R4GB
10
9
0.75
0.75
0.5
JT550-S2-0R7GB
16
12
0.75
0.75
0.5
JT550-S2-1R5GB
25
18
1.5
1.5
0.5
JT550-S2-2R2GB
32
25
2.5
2.5
0.5
JT550-T3-0R7G/1R5PB
6
9
0.75
0.75
0.5
JT550-T3-1R5G/2R2PB
10
9
0.75
0.75
0.5
JT550-T3-2R2G/4R0PB
10
9
0.75
0.75
0.5
JT550-T3-4R0G/5R5PB
16
12
1.5
1.5
0.5
JT550-T3-5R5G/7R5PB
20
18
2.5
2.5
0.75
JT550-T3-7R5G/011PB
32
25
4.0
4.0
0.75
JT550-T3-011G/015PB
40
32
4.0
4.0
0.75
JT550-T3-015G/018PB
50
38
6.0
6.0
0.75
JT550-T3-018G/022PB
50
40
10
10
1.0
JT550-T3-022G/030PB
63
50
10
10
1.0
JT550-T3-030G/037P
100
65
16
16
1.0
JT550-T3-037G/045P
100
80
25
25
1.0
JT550-T3-045G/055P
125
95
35
35
1.0
JT550-T3-055G/075P
160
115
50
50
1.0
JT550-T3-075G/090P
225
170
70
70
1.0
JT550-T3-090G/110P
250
205
95
95
1.0
JT550-T3-110G/132P
315
245
120
120
1.0
JT550-T3-132G/160P
350
300
120
120
1.0
JT550-T3-160G/185P
400
300
150
150
1.0
JT550-T3-200G/220P
500
410
185
185
1.0
JT550-T3-220G/250P
630
475
2*120
2*120
1.0
JT550-T3-250G/280P
630
475
2*120
2*120
1.0
JT550-T3-280G/315P
700
620
2*120
2*120
1.0
JT550-T3-315G /355P
800
620
2*150
2*150
1.0
JT550-T3-355G /400P
1000
800
2*185
2*185
1.0
JT550-T3-400G /450P
1250
800
2*240
2*240
1.0
JT550-T3-450G
1250
1000
2*240
2*240
1.0
JT550-T3-500G
1600
1000
2*300
2*300
1.0
JT550-T3-560G
1600
1250
2*300
2*300
1.0
JT550-T3-630G
2000
1600
2*300
2*300
1.0
JT550-T3-710G
2500
2000
2*300
2*300
1.0
3.4 Selection of Braking Unit and Braking Resistor
Value selection of the Braking Resistor
The AC drive transfers regenerative energy generated during braking of motor to external
braking resistor.
According to the formula U* U/R = Pb:
• U: the braking voltage at system stable braking.
• U: value varies with the system. The 380 VAC power system usually selects 700 V braking
• Pb: braking power.
Power selection of the Braking Resistor
In theory, power of braking resistor is the same as braking power. But in consideration of derating, power of
braking resistor is calculated from the following formula:according to the formula :0.7 * Pr = Pb* D.
