YASKAWA VARISPEED-656RC5 Manual page 2

Fully Supports Inverters
VS-656RC5 can do Three jobs with One Unit
Applications
■
When power regeneration can be
advantageous:
Cranes, elevators, centrifugal separators,
winders, etc.
Applicable Inverters
■
Varispeed G7, Varispeed F7,
VS-686SS5, VS-626MC5, etc.
■ Safety Standards
C US
LISTED
UL／cUL Standard CE marking
2
The VS-656RC5 is a power regenerative unit
with both braking and regenerative functions.
The VS-656RC5 shows great energy-saving
performance in combination with an inverter.
Because the VS-656RC5 does not require a
braking resistor unit, it requires less space and
enhances braking ability.
The VS-656RC5 will dramatically affect
applications with large minus loads such as
cranes and elevators.
Braking
Power Braking
Resistor
Regeneration Unit
Unit
Connection
Inverter
Power flow Diode
during motoring converter Inverter
Power coordinating reactor
VS-656RC5
Current
suppressing
reactor
FU
Power flow during
regenerating
Helps the Energy-Saving Drive
The VS-656RC5 operates only at power regeneration with 120˚ current conduction.
It efficiently regenerates load energy to the power supply, which results in significant energy savings.
Rated load: 10 t Rated Winding Speed: 20 m/min Applied Motor: 37 kW, 6-pole, 1150 r/min
100%
Winding
Speed
0
150%
90%
Torque
0
55.5kW
33.3kW
Power
0
2
15
sec. sec.
Operating Conditions: 5000h/year Electrical costs ＄0.12/kWh
1
Electric Power Consumption: P= (55.5kW× ×2+33.3kW×15+11.1× ×2)×
78
−(3.7kW× ×2+25.9kW×5+48.1× ×2)×0.9×0.95
=8.49kW−4.82kW=3.67kW
Electrical Costs＝3.67×5,000×0.12＝
Resistor Discharge Type P＝8.49kW
Electrical Costs＝8.49×5,000×0.12＝
Note: When using an inverter with a resistor discharge, braking resistor and
braking resistor unit require 3 times the standard rated power.
You save 5094 − 2202 ＝
Requires Less Space
The VS-656RC5 requires less than half the area and is less than half the bulk of braking resistor
systems that have a braking unit + braking resistor .
A magnetic contactor is not needed.
Braking Resistor
■
System
Braking resistor
356 （W） ×543 （H） ×260 （D）
Braking unit
140 （W） ×280 （H） ×160 （D）
IM
Dimensions in mm
Enhances Braking Ability
Dramatically improved braking ability.
Calculations of torque, time, and frequency are not needed.
■ Braking Resistor System
•Without options: Approx. 10 to 20%/continuous rating
•With standard options: Approx. 100 to 130%/max. 10sec.,
10%ED
＊ Except for conditions above, additional options will be required.
Cranes Centrifugal Separator
Speed
0
Unwinding
Torque
30%
0
10%
70%
11.1kW 130%
Power
3.7kW 0
25.9kW
55.5kW
2 20 2 2 20
15
sec. sec. sec. sec. sec. sec.
78 sec.
Motor Efficiency: 90%
Inverter Efficiency: 95%
Operating Conditions: 5000h/year Electrical costs ＄0.12/kWh
1 1 1
Electric Power Consumption: P= (39kW× ×180+6kW×180)×
2 2
0.9×0.95
1 1
−(36kW× ×180)×0.9×0.95
2 2
=7.46kW−3.85kW=3.61kW
＄2202
Electrical Costs＝3.61×5,000×0.12＝
Resistor Discharge Type
＄5094
Note: When using an inverter with a resistor discharge, braking resistor and
braking resistor unit require 2.5 times the standard rated power.
2892
＄ ／year
You save 4476 − 2166 ＝
VS-656RC5
■
Example of 200V 15kW with standard options Example of 200V 15kW
VS-656RC5
■
•80%/continuous rating
•100%/1min., 25%ED
•150%/30 sec.
＊ Except for conditions above, apply a higher capacity unit.
(for industrial waste)
Applied Motor: 30kW, 4-pole
100%
130%
20%
39kW 120%
6kW
36kW
180 sec. 180 sec. 180 sec. 180 sec.
180 sec.( approx. 12 min.)
Motor Efficiency: 90%
Inverter Efficiency: 95%
1 1 1
2
720 0.9×0.95
1
2
＄2166
P＝7.46kW
＄4476
Electrical Costs＝7.46×5,000×0.12＝
2310
＄ ／year
–63
%
Area :
–72
%
Bulk :
VS-656RC5
200 （W） ×300 （H） ×265 （D）
Power coordinating reactor
180 （W） ×90 （H） ×100 （D）
Power suppressing reactor
120 （W） ×90 （H） ×71 （D）
Dimensions in mm
3