TECO SPEECON GS510 - GROUNDING (PE: Protective Earth)

11
(B) GROUNDING (PE: Protective Earth)
Ground the 7200GS/GS510 through ground terminal E (PE).
(1) Ground resistance should be 100 ohms or less.
(2) Never ground 7200GS/GS510 in common with welding machines, motors, and
other large-current electrical equipment, or ground pole. Run the ground lead
in separate conduit from leads for large-current electrical equipment.
(3) Use the ground leads which comply with AWG standards and make the sure
the length is as short as possible.
(4) Where several 7200GS/GS510 units are used side by side, it is preferable to
ground each unit separately to ground poles. However, connecting all the
ground terminals of 7200GS/GS510 in parallel while grounding only one of the
7200GS/GS510’s to the ground pole is also permissible (Fig. 3). Be sure not to
form a loop with the ground leads.
CORRECT CORRECT NOT ACCEPTABLE
(a) (b) (c)
Fig. 3 Grounding of Three 7200GS/GS510 Units
(C) CONTROL CIRCUIT
(1) Separation of control circuit leads and main circuit leads: All signal leads must
be separated from main circuit leads L1 (R), L2 (S), L3 (T), ○
+
, ○
-
, B2, T1 (U),
T2 (V), T3 (W) and other power cables to prevent erroneous operation caused
by noise interference.
(2) Control circuit leads ○
9
, ○
10
, ○
18
, ○
19
, ○
20
(contact output) must be separated from
leads 1 to 8, ○
21
, ○
22
, ○
25
, ○
26
, ○
27
and ○
11
～○
17
.
(3) Use twisted shielded or twisted pair shielded wire for the control circuit line
and connect the shield sheath to the inverter terminal E to prevent malfunction
caused by noise. See Fig.4. Wiring distance should be less than 164ft (50m).
Fig. 4 Shielded Wire Termination
PE
PE
PE
PE
PE
PE
PE
PE
PE
ARMOR
SHIELD
SHEATH
TO INVERTER SHIELD
SHEATH TERMINAL E
NEVER CONNECT
INSULATE THESE PARTS
WITH INSULATING TAPE.