Electrical Wiring Installation - Mitsubishi Electric e Series Service Handbook

[ II Restrictions ]
II Restrictions

[1] Electrical Wiring Installation

[1] Main Power Supply Wiring and Switch Capacity
Schematic Drawing of Wiring (Example)
<A>:Switch (with current breaking capability)
<B>:Current leakage breaker
<C>:Unit
Main power supply wire size, switch capacities, and system impedance
Model
EACV/EAHV-M1500/1800YCL
1. Use a dedicated power supply for each unit. Ensure that each unit is wired individually.
2. When installing wiring, consider ambient conditions (e.g., temperature).
3. The wire size is the minimum value for metal conduit wiring. If voltage drop is a problem, use a wire that is
one size thicker.
Make sure the power-supply voltage does not drop more than 5%.
4. Specific wiring requirements should adhere to the wiring regulations of the region.
5. Power supply cords of appliances shall not be lighter than polychloroprene sheathed flexible cord
(design 60245 IEC57).
6. A switch with at least 3 mm contact separation in each pole shall be provided by the Air Conditioner installer.
7. Do not install a phase advancing capacitor on the motor. Doing so may damage the capacitor and result in fire.
Warning:
• Be sure to use specified wires and ensure no external force is imparted to terminal connections. Loose
connections may cause overheating and fire.
• Be sure to use the appropriate type of overcurrent protection switch. Note that overcurrent may include
direct current.
Caution:
• Some installation sites may require an installation of an earth leakage breaker for the inverter. If no earth
leakage breaker is installed, there is a danger of electric shock.
• Only use properly rated breakers and fuses. Using a fuse or wire of the wrong capacity may cause
malfunction or fire.
Note:
• This device is intended for the connection to a power supply system with a maximum permissible system
impedance shown in the above table at the interface point (power service box) of the user's supply.
• Ensure that this device is connected only to a power supply system that fulfills the requirements above.
If necessary, consult the public power supply company for the system impedance at the interface point.
• This equipment complies with IEC 61000-3-12 provided that the short-circuit power S
equal to S (*2) at the interface point between the user's supply and the public system. It is the
SC
responsibility of the installer or user of the equipment to ensure, in consultation with the distribution
network operator if necessary, that the equipment is connected only to a supply with a short-circuit power
S greater than or equal to S
SC
S (*2)
SC
S (MVA)
SC
10.35
Control cable specifications
Remote controller cable
M-NET cable between units
*1
External input wire size
External output wire size
*1 Use a CVVS or CPEVS cable (Max. total length of 250 m) if there is a source of electrical interference nearby (e.g., factory) or the total length of control wiring
exceeds 200 m.
HWE20010
Minimum wire size (mm 2 )
Main cable Branch Ground
35 - 35
(*2).
SC
Size
Recommended cable types
Size
Recommended cable types
<B>
3N~380–415V
L , L , L3, N
1 2
Local switch (A)
Current leakage breaker
Capacity
160 A 200 mA 0.1 sec. or less 150
0.3 mm² (Max. 250 m total)
2-core sheathed cable
Min. 1.25 mm² (Max. 200 m total)
Shielded cable CVVS, CPEVS or MVVS
Min. 0.3 mm²
1.25 mm²
- 21 -
<A>
<C>
PE
No-fuse breaker (A)
Fuse
150 160
is greater than or
SC
Max. Permissive
System Impedance
0.06 Ω
GB