Mitsubishi Electric FR-V500 Series Instruction Manual page 118

Appendix2 Instructions for UL and cUL
(Conformance Standard UL 508C, CSA C22.2 No. 14)
(1) Installation
The FR-V500 is UL-listed as a product for use in an enclosure.
Design an enclosure so that the ambient temperature, humidity and atmosphere of the inverter will satisfy the specifications.
(Refer to page 6.)
Branch circuit protection
For installation in the United States, branch circuit protection must be provided in accordance with the National Electrical Code and any
applicable local codes.
For installation in Canada, branch circuit protection must be provided in accordance with the Canada Electrical Code and any applicable
provincial codes.
(2) Wiring of power supply and motor
For wiring the input (R, S, T) and output (U, V, W) terminals of the inverter, use the UL-recognized copper wires (rated at 75°C) and round
crimping terminals. To crimp the crimping terminals, use the crimping tool recommended by the terminal maker.
(3) Short circuit ratings
• 200V class
Suitable For Use in A Circuit Capable of Delivering Not More Than 100kA rms Symmetrical Amperes, 264V Maximum.
• 400V class
Suitable For Use in A Circuit Capable of Delivering Not More Than 100kA rms Symmetrical Amperes, 528V Maximum.
(4) Motor overload protection
These inverters provide solid state motor overload protection.
Set parameter 9 using the following instructions (Pr. 9 "electronic thermal O/L relay").
Parameter Name
9 Electronic thermal O/L relay
Second electronic thermal
452
O/L relay
876 Thermal relay protector input
<Setting>
• When not using an external thermal relay, set the rated current value [A] of the motor in Pr. 9 (Pr. 452) to make the electronic thermal
relay function valid.
(Normally set the rated current value at 50Hz. When the rated current value of 50Hz is not indicated on the name plate, set the value
obtained from multiplying the rated current value of 60Hz by 1.1.)
• Setting "0" in Pr. 9 (Pr. 452) deactivates the electronic thermal relay function (motor protective function). (The inverter's output
transistor protective function is activated.)
• When using a Mitsubishi constant-torque motor
• Set "10" in Pr. 71 "applied motor" to select the 100% continuous torque characteristic in the low speed range.
• Set the rated current of the motor in Pr. 9 "electronic thermal O/L relay".
• The electronic thermal relay function of the second motor (Pr. 452 "second electronic thermal O/L relay" is made valid by:
Turning on the RT signal; and
Setting other than 9999 in Pr. 450.
(The value set in Pr. 9 is valid when Pr. 452 = 9999.)
• Use Pr. 876 to select with or without an external thermal relay.
CAUTION
• When two or more motors are connected to the inverter under V/F control, they cannot be protected by the electronic
thermal relay function. Install an external thermal relay to each motor.
• When a difference between the inverter and motor capacities is large and the setting is small, the protective
characteristics of the electronic thermal relay function will be deteriorated. In this case, use an external thermal relay.
• A special motor cannot be protected by the electronic thermal relay function. Use an external thermal relay.
Factory Setting
,
50% setting * ** 100% setting **
70
900 r/min
higher ***
600 r/min
300 r/min
60
180 r/min
15 r/min
50
240
180
120
60
52.5%
0 50 100
Inverter output currect (%)
(% in reference to rated inverter output currect)
Setting Range
0 0 to 500A
0 to 500A,
9999
9999
1 0, 1
Protection activating range
Range on the right of
900 r/min
characteristic curve
higher ***
600 r/min Normal operating range
Range on the left of
300 r/min
characteristic curve
180 r/min
Electronic thermal relay setting
Set the value in terms of current value
from the parameter unit.
15 r/min
Set value = rated motor current × α (A)
α : 200V (400V) 50Hz
200/220V (400/440V) 60Hz
[Set value]
Motor: SF-V5RU 3kW 6P
Rated current = 20.0A (220V 60Hz)
Inverter: FR-V520-3.7K
Set value = 20.0 × 1.1
= 22 (A)
Hence, set to 22 (A)
Characteristic when electronic thermal relay for motor protection
is switched off (Set value = 0 (A))
Set value (current value) = 50% of rated inverter output current
*
The % value indicates % in reference to rated inverter output current.
**
The value does not indicate % in reference to rated motor current.
This characteristic curve applies only during operation at 180 r/min or
***
higher when the electronic thermal relay dedicated to Mitsubishi
constant torque motor has been set.
Electronic thermal relay
105%
for transistor protection
150 180 200
115
Remarks
Extended mode
Extended mode
9999: Without second electronic
thermal relay function
Extended mode
1.0
1.1