Mitsubishi Electric 800 Series Instruction Manual page 18

Appendix
Appendix 1
(Standard to comply with: UL 508C, CSA C22.2 No.274-13)
 General precaution
CAUTION - Risk of Electric Shock -
The bus capacitor discharge time is 10 minutes. Before starting wiring or inspection, switch power off, wait for more than 10 minutes, and check for residual
voltage between terminal P/+ and N/- with a meter etc., to avoid a hazard of electrical shock.
ATTENTION - Risque de choc électrique -
La durée de décharge du condensateur de bus est de 10 minutes. Avant de commencer le câblage ou l'inspection, mettez l'appareil hors tension et attendez plus
de 10 minutes.
 Installation
• The FR-A860-00450 and lower inverters have been approved as products for a UL type1 enclosure that is suitable for Installation in a Compartment Handling
Conditioned Air (Plenum).
Install the inverter so that the ambient temperature, humidity and ambience of the inverter will satisfy the specifications. (Refer to
• The FR-A860-00680 and higher inverters have been approved as products for use in enclosure and approval tests were conducted under the following
conditions.
Design the enclosure so that the surrounding air temperature, humidity and ambience of the inverter will satisfy the above specifications. (Refer to
 Branch circuit protection
For installation in the United States, Class T, Class J, Class CC, or Class L fuse must be provided, in accordance with the National Electrical Code and any
applicable local codes.
For installation in Canada, Class T, Class J, Class CC, or Class L fuse must be provided, in accordance with the Canadian Electrical Code and any applicable
local codes.
FR-A860-[]
Rated fuse voltage(V)
Without power
factor improving
Fuse allowable rating
reactor
(A)
With power factor
improving reactor
 Wiring to the power supply and the motor
Refer to the National Electrical Code (Article 310) regarding the allowable current of the cable. Select the cable size for 125% of the rated current according to the
National Electrical Code (Article 430).
For wiring the input (R/L1, S/L2, T/L3) and output (U, V, W) terminals of the inverter, use the UL listed copper, stranded wires (rated at 75
terminals. Crimp the crimping terminals with the crimping tool recommended by the terminal manufacturer.
 Short circuit ratings
Suitable for use in a circuit capable of delivering not more than 100 kA rms symmetrical amperes, 600 V maximum.
 Motor overload protection
When using the electronic thermal relay function as motor overload protection, set the rated motor current in Pr.9 Electronic thermal O/L relay.
Operation characteristics of electronic thermal relay function
Pr. 9 = 50% setting of
inverter rating* 1.2
70
30Hz
or more
20Hz
60
10Hz
6Hz
0.5Hz
50
240
180
120
60
52.5% 105%
50 100
Inverter output current (%)
(% to the rated output current)
NOTE
• The internal accumulated heat value of the electronic thermal relay function is reset by inverter power reset and reset signal input. Avoid unnecessary reset and power-
OFF.
• When multiple motors are driven with a single inverter or when a multi-pole motor or a special motor is driven, install an external thermal relay (OCR) between the
inverter and motors. Note that the current indicated on the motor rating plate is affected by the line-to-line leakage current (details in the Instruction Manual (Detailed))
when selecting the setting for an external thermal relay.
• The cooling effect of the motor drops during low-speed operation. Use a thermal protector or a motor with built-in thermistor.
• When the 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.
• Motor over temperature sensing is not provided by the drive.
18
Appendix
Instructions for UL and cUL
00027 00061 00090 00170
600 V or more
10 20 30 40
6 10 15 25
Pr. 9 = 100% setting
of inverter rating* 1.2
30Hz or more
20Hz
Operation range
Range on the right of
10Hz
characteristic curve
6Hz
Non-operation range
Range on the left of
0.5Hz
characteristic curve
Characteristic when electronic thermal
relay function for motor protection is
turned off (When Pr. 9 setting is 0(A))
Range for
transistor
protection
*
3
150 230
00320 00450 00680 01080
80 125 125 175
40 60 100 150
This function detects the overload (overheat) of the motor, stops the operation of the
inverter's output transistor, and stops the output. (The operation characteristic is shown on
the left.)

When a value 50% of the inverter rated output current (current value) is set in Pr.9

The % value denotes the percentage to the inverter rated current. It is not the
percentage to the rated motor current.

Transistor protection is activated depending on the temperature of the heat sink. The
protection may be activated even with less than 150% depending on the operating
conditions.
page 5.)
01440 01670 02430 02890
― ― ― ―
200 250 300 400
) and round crimping
°C
page 5.)
03360 04420
― ―
450 600