Edwards iH80 Instruction Manual page 28

A590-00-880 Issue D
3. On an iH160,1000 or 1800 system, the earth (ground) installation must ensure that there is an
equipotential zone around the iH system: the voltage between the protective earth (ground) stud on the
iH system and any other conducting surface within 2 metres of the iH system must be <30 V r.m.s.
4. If you connect the electrical supply to an iH160,1000 or 1800 system through ELCB relays, they must be
suitable for protection of equipment with a d.c. component in the fault current, and suitable for short
duration switch-on surges, and for high leakage current (for example, type B, according to prEN50178).
The iH160,1000 or 1800 system is for use only with equipment that has no accessible terminals.
Refer to Figure 4, item 9.
Use the following procedure to connect the electrical supply to the iH system. When you make your electrical supply
cable, ensure that the earth (ground) conductor is longer than the phase conductors. This will ensure that if the cable
is accidentally dragged and the strain relief bush on the electrical supply connector mating-half fails, the earth
(ground) conductor will be the last conductor to be pulled from the connector.
1. Refer to Figure 11. Remove the connector block from the cover (10) of the mating-half supplied for the
electrical supply connector, then pass a suitable cable (9) through the strain relief bush (8) on the cover (10).
Refer to Section 2 for suitable cable sizes.
2. Connect the cable phase wires to the pins in the connector block as shown in
3. Connect the earth (ground) wire of the cable to one of the two earth (ground) screws (7) on the side of the
connector block.
4. Refit the cover (10) to the connector block then tighten the strain relief bush (8).
5. Fit the mating-half to the electrical supply connector (2) on the Electrics Box (1).
6. Connect the other end of the electrical supply cable to your electrical supply through a suitable isolator, or via
the disconnect box (refer to
7. On iH80, 160 and 600 systems, we recommend that you fit a second protective earth (ground) conductor to the
protective earth (ground) stud on the Electrics Box
conductor to your factory earth (ground). On an iH1000 and 1800 systems, you must fit a second protective earth
(ground) conductor.
Page 22
Section 7.3).
(Figure
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Table 5.
3, item 1) and connect the other end of this
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