Mitsubishi Electric FR-F862 Instruction Manual page 84

Appendix 2
(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-F862 inverters with the below types of converter unit have been approved as products for use in enclosure.
Design the enclosure so that the surrounding air temperature, humidity and ambience of the inverter will satisfy the
specifications. (Refer to page
 Wiring 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-CC2-[ ]
Rated fuse voltage (V)
Fuse allowable rating (A)
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) terminals of the converter unit and output (U, V, W) terminals of the inverter, use the UL
listed copper, stranded wires (rated at 75°C) and round crimp terminals. Crimp the terminals with the crimping tool
recommended by the terminal maker.
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
30 Hz
or more
20 Hz
60
10 Hz
6 Hz
0.5 Hz
50
240
180
120
60
52.5%
50
(% to the inverter rated current)
Instructions for UL and cUL
17.)
C355K C400K
575 V or more
700 800
Pr.9 = 100% setting
of inverter rating ∗2
30 Hz
Operation region
or more
Region on the right of
characteristic curve
20 Hz
Non-operation region
10 Hz
Region on the left of
6 Hz characteristic curve
0.5 Hz Characteristic when
electronic thermal relay
function for motor
protection is turned off
(When Pr.9 setting is 0(A))
Range for
the transistor
protection ∗3
105%
100
150 230
Inverter output power (%)
C560K
1000
This function detects the overload (overheat) of the motor
and trips the inverter by stopping the operation of the
transistor at the inverter output side. (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 rated inverter
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.
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APPENDIX