23
(Standard to comply with: UL 508C, CSA C22.2 No. 14)
1. General Precaution
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 te and - with a meter etc., to avoid a hazard of electrical shock.
2. Installation
The below types of inverter have been approved as products for use in enclosure and approval tests were conducted under the
following conditions. Design the enclosure so that the ambient temperature, humidity and ambience of the inverter will satisfy the
above specifications.
Wiring protection
Integral solid state short circuit protection does not provide branch circuit protection. Branch circuit protection must be provided in
accordance with the National Electrical Code for the U.S. or the Canadian Electrical Code for Canada and any additional codes. As
specified, UL Class T fuses or any faster acting fuse with the appropriate rating must be employed.
∗
Maximum allowable rating by US National Electrical Code.Exact size must be chosen for each installation.
3. Short circuit ratings
•
200V class
Suitable For Use in A Circuit Capable of Delivering Not More Than 100 kA rms Symmetrical Amperes, 264 V Maximum.
•
400V class
Suitable For Use in A Circuit Capable of Delivering Not More Than 100 kA rms Symmetrical Amperes, 528 V Maximum.
4. Wiring
⋅
The cables used should be 75°C copper cables.
⋅
Tighten the terminal screws to the specified torques.
Undertightening can cause a short or misoperation.
Overtightening can cause the screws and unit to be damaged, resulting in a short or misoperation.
⋅
Use the UL approved round crimping terminals. Crimp the terminals with the crimping tool recommended by the terminal
manufacturer.
Appendix 2 Instructions for UL and cUL
FR-D740-
-EC
012
022
036
050
080
120
160
Rated fuse voltage(V)
480V or more
Fuse Maximum
allowable rating
(A)
∗
Without power factor
improving reactor
6
10
15
20
30
40
70
With power factor
improving reactor
6
10
10
15
25
35
60
FR-D720S-
-EC
008
014
025
042
070
100
Rated fuse voltage(V)
240V or more
Fuse Maximum
allowable rating
(A)
∗
Without power factor
improving reactor
15
20
20
30
40
60
With power factor
improving reactor
15
20
20
20
30
50
D700_EC_Guideline_ib0600352ENG.book 23 ページ ２００８年４月１０日 木曜日 午後２時６分
