Hydrovar Pump Controller Installation & Operation Manual
Hydrovar Pump Controller Installation & Operation Manual
Hydrovar Pump Controller Installation & Operation Manual
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Electrical <strong>Installation</strong> and Wiring<br />
8.2 EMC – Electromagnetic Compatibility<br />
To ensure electromagnetic compatibility the following points must be observed for cable installation:<br />
Control Cables<br />
General Recommendations<br />
Motor Wires<br />
Use shielded cables, temperature rated at 60º C (140º F) or above:<br />
• Control cables must be multi-core cables with a braided copper wire screen.<br />
Double Shielded Single Shielded<br />
Example: JAMAK by Draka NK Cables Example: NOMAK by Draka NK Cables<br />
• The screen must be twisted together into a bundle not longer than five times its width and connected<br />
to terminal X1-1 (for digital and analog I/O cables) or to either X1-28 or X1-32 (for RS485<br />
cables).<br />
Route control cables to minimize radiation to the cable:<br />
• Route as far away as possible from the input power and motor cables (at least 20 cm (8 in)).<br />
• Where control cables must cross power cables make sure they are at an angle as near 90º as<br />
possible.<br />
• Stay at least 20 cm (8 in) from the sides of the drive.<br />
Use care in mixing signal types on the same cable:<br />
• Do not mix analog and digital input signals on the same cable.<br />
• Run relay-controlled signals as twisted pairs (especially if voltage > 48 V). Relay-controlled signals<br />
using less than 48 V can be run in the same cables as digital input signals.<br />
NOTE! Never mix 24 VDC and AC power signals in the same cable.<br />
To ensure the EMC compatibility and minimize noise level and leakage currents, use the shortest possible<br />
motor wires. Use shielded wires only if the total length exceeds 6 feet.)<br />
Line Reactors<br />
Line reactors are available as an option and should be mounted between the HYDROVAR and the main<br />
fuse. The Line reactor should be as close to the HYDROVAR as possible, (max. 12").<br />
Advantages:<br />
• more efficient<br />
• reduction of harmonic currents<br />
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