Low Voltage Directive - Panasonic KW2M-A User Manual

Recommended cable
Use the transmission cables shown below for the Eco-POWER METER RS485 communication system.
Conductor
Cable
Size
Min.
1.25mm
Twisted (AWG16)
pair cable
with shield Min.
2
0.5mm
(AWG20)
Min.
VCTF 0.75mm
(AWG18)
Cable
Twisted pair
cable with
Conductor
shield
VCTF
Conductor

4.9 Low Voltage Directive

In order to use the device under the measurement category III, install varistors or SPD between the lines
of power supply and the measured voltage input. Use the varistors or SPD compliant with European
standards and specifications to meet power supply and current.
When the device is to used in applications conforming to EN61010-1/IEC61010-1, make sure to satisfy
the following conditions.
1) RS485 communication part and pulse input part ensure only basic insulation. In order to ensure
reinforced (double) insulation demanded by EN 61010-1/ IEC61010-1, use a basic insulation or better
with load side and reinforced (double) insulation with the RS485 communication system side.
2) Provide the voltage input part with an EN60947-1 or EN60947-3 compliant circuit breaker.
3) Use a wire with basic insulation or better for a wire cramped (or connected) CT.
4) The Vn terminal should be connected to a grounded N-phase.
【Environmental conditions】
・Overvoltage category III, Pollution degree 2
・Indoor use
・An ambient temperature of -10 to +50°C
・An ambient non-condensing humidity of 30 to 85%RH (at 20°C)
・Usable altitude: max. 2000m above sea level
【Mount the product in a place with】
・A minimum of dust, and an absence of corrosive gases
・No flammable, explosive gasses
・Few mechanical vibrations or shocks
・No exposure to direct sunlight
・No large capacity electromagnetic switches or cables through which large current is flowing
KW2M-A/X User's Manual
Resistance (at
20°C）
2
Max. 16.8Ω/km
Polyethylene
Max. 33.4Ω/km
Polyethylene
2
Max. 25.1Ω/km
PVC
Section
Shield
Jacket
Insulator
Jacket
Insulator
Material Thickness
Max.
0.5mm
Max.
0.5mm
Max.
0.6mm
Notes
1) Use shielded type twisted pair cables.
2) Use only one type of transmission cable.
3) Do not mix different types of cables.
4) Use twisted pair cables under a bad noise
environment.
Insulator
Cable
Applicable cable
diameter
HITACHI
Approx. KPEV-S
2
8.5mm 1.25mm ×1P
Belden Inc. 9860
HITACHI
Approx. KPEV-S
2
7.8mm 0.5mm ×1P
Belden Inc. 9207
VCTF
Approx.
2
0.75mm ×2C
6.6mm
(JIS)
Wiring
19