31
9. Power supply system
• Each power supply system for heating cables should be equipped with the
residual current device of the sensitivity
∆
Ł
30mA, for anti-shock
protection. One RCD device should protect electric circuits no longer than
500 m each.
• To protect the power supply system against short circuits, it is required to
apply type C characteristics circuit breakers.
• Application of contactors is recommended for the systems with large
current load. This will protect controllers and prolong fault-free operation
of those devices.
10. Check of the ready system
After the heating cable and thermal insulation have been laid, perform the
measurements of the heating cable insulation’s resistance, and test-run the
heating circuits to assess the correctness and safety of the system’s
operation.
The heating cable insulation’s
resistance, as measured with
an appliance of the rated
voltage 1000 V
(megaohmmeter),
should not drop below
50 M
Ω
.
Enter the results
into the
Warranty Card.
Summary of Contents for SelfTec PRO 10
Page 2: ......
Page 23: ...Installation of a self regulating heating cable on a valve 23 ...
Page 36: ...ESG EN 416 Grupa V5 04 16 0 1 c www elektra eu ...
Page 38: ......
Page 59: ...Układanie przewodu samoregulującego na zaworze 59 ...
Page 72: ...ESG PL 416 Grupa V5 04 16 0 1 c www elektra pl ...
Page 74: ......
Page 95: ...Монтаж саморегулирующегося кабеля на клапане 95 ...
Page 108: ...ESG RU 416 Grupa V5 06 19 0 1 b www elektra eu ...