Grounding And Power Connections - NF DP420LS Instruction Manual

2. Preparation before Use
2.4

Grounding and Power Connections

 Ensure to ground.
This product uses a line filter. If this product is not grounded, an electric shock might occur.
WARNING
 Ensure to connect the protective conductor terminal of the power input terminal of this product
to an earth ground so that ground resistance is 100  or less. If the product is not certainly
grounded, an electric shock might occur.
 To prevent electric shock, ensure that the protective grounding conductor is connected before
you connect a cable to the power input terminals L1, L2 and L3.
 For grounding, use a power cable of sufficient ampacity for the maximum input current (see
Table 2-4).
 Before connecting the product to power source, check the followings.
WARNING
 The power supply for this product must be taken from the distribution board.
 Be sure to switch off the breaker at the distribution board before connecting this product to the
distribution board. Otherwise, an electric shock might occur.
 Route the wire so that the distance between this product and the distribution board breaker is
3 m or less. If the distance with the distribution board exceeds 3 m, install another switch within
3 m from this product to connect. Use a switch complying with IEC 60947-1 and IEC 60947-3
which can disconnect all L1, L2 and L3 phases (protective grounding must not be disconnected).
Mark the switch with a sign indicating that it is a disconnecting device of power input for this
product.
These are from requirements in IEC 61010-1.
CAUTION
 Condensation may form inside the product when the ambient temperature or humidity changes
suddenly, for example, after transportation in winter. In such case, leave the product in room
temperature enough time to evaporate the condensation before connecting the product to the
power source.
 Check the power source
For safety, use the product in the ranges of input voltage and frequency described below. Connect
the product to a distribution board which provides the power sufficiently higher than the maximum
input power of each model (see Table 2-4).
Voltage range: 200 V 30 V (3P3W)
Frequency range: 50 Hz/60 Hz 2 Hz
10 PROGRAMMABLE AC POWER SOURCE