Appendix 2 Instructions For Ul And Cul - Mitsubishi Electric A800 Instruction Manual

Appendix 2
(Standard to comply with: UL 508C, CSA C22.2 No.14)
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-A802 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-[ ]-P
Rated fuse voltage (V)
Fuse maximum allowable rating (A)

Maximum allowable rating by US National Electrical Code. Exact size must be chosen for each installation.
Wiring to the power supply and the motor
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 crimping 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, 500 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 Pr.9 = 100% setting
of inverter rating ∗1, 2 of inverter rating
70
30 Hz
or more ∗3
20 Hz
60
10 Hz
6 Hz
50 0.5 Hz
240
180
120
60
105%
52.5%
100
50
Inverter output power (%)
(% to the inverter rated current)
Instructions for UL and cUL
17.)
H400K H450K
500 V or more
1350 1500

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.)
∗2
• Mitsubishi constant-torque motor
30 Hz
Operation region
or more ∗3
Region on the right of
characteristic curve
20 Hz
(1) Set one of "1", "13" to "16" in Pr.71. (This setting will enable the 100%
Non-operation region
10 Hz
Region on the left of
6 Hz characteristic curve
constant-torque characteristic in the low-speed range.)
Characteristic when
0.5 Hz
electronic thermal relay
(2) Set the rated current of the motor in Pr.9.
function for motor
protection is turned off
(When Pr.9 setting is 0(A))
Range for
the transistor
protection ∗4
150 230
H500K H560K
1800 1800

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.

When you set the electronic thermal relay function dedicated to the Mitsubishi
constant-torque motor, this characteristic curve applies to operation at 6 Hz or
higher.

Transistor protection is activated depending on the temperature of the heatsink.
The protection may be activated even with less than 150% depending on the
operating conditions.
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APPENDIX